추세선 전략추가

backend/src/main/java/com/goldenchart/dto/BacktestSettingsDto.java

@@ -114,4 +114,21 @@ public class BacktestSettingsDto {
      */
     @Builder.Default
     private String tradeExecutionMode = "BACKTEST_ENGINE";
+
+    // ── 추세선 조건 (TREND_LINE_CROSS_*) ─────────────────────────────────────
+    /** TWO_POINT | REGRESSION | SWING */
+    @Builder.Default
+    private String trendLineMode = "TWO_POINT";
+
+    /** 조건에 lookback 미지정 시 기본 N봉 */
+    @Builder.Default
+    private Integer trendLineDefaultLookback = 10;
+
+    /** SWING 모드 — 스윙 저점 좌측 확인 봉 수 */
+    @Builder.Default
+    private Integer trendLineSwingPrecedingBars = 1;
+
+    /** SWING 모드 — 스윙 저점 우측 확인 봉 수 */
+    @Builder.Default
+    private Integer trendLineSwingFollowingBars = 1;
 }

backend/src/main/java/com/goldenchart/dto/TrendLineConfig.java

@@ -0,0 +1,52 @@
+package com.goldenchart.dto;
+
+import lombok.*;
+
+/**
+ * 추세선 조건 평가 설정 — gc_backtest_settings 와 동기.
+ * SWING: 스윙 피벗(저점·고점) 2개 연결 · TWO_POINT/REGRESSION: 피벗 실패 시 폴백
+ */
+@Data @Builder @NoArgsConstructor @AllArgsConstructor
+public class TrendLineConfig {
+
+    public static final String MODE_TWO_POINT = "TWO_POINT";
+    public static final String MODE_REGRESSION = "REGRESSION";
+    public static final String MODE_SWING = "SWING";
+
+    @Builder.Default
+    private String mode = MODE_SWING;
+
+    @Builder.Default
+    private int defaultLookback = 10;
+
+    @Builder.Default
+    private int swingPrecedingBars = 1;
+
+    @Builder.Default
+    private int swingFollowingBars = 1;
+
+    public static TrendLineConfig defaults() {
+        return TrendLineConfig.builder().build();
+    }
+
+    public static TrendLineConfig fromSettings(BacktestSettingsDto dto) {
+        if (dto == null) return defaults();
+        String mode = dto.getTrendLineMode();
+        if (mode == null || mode.isBlank()) mode = MODE_TWO_POINT;
+        if (!MODE_TWO_POINT.equals(mode) && !MODE_REGRESSION.equals(mode) && !MODE_SWING.equals(mode)) {
+            mode = MODE_TWO_POINT;
+        }
+        int lookback = dto.getTrendLineDefaultLookback() != null && dto.getTrendLineDefaultLookback() > 1
+                ? dto.getTrendLineDefaultLookback() : 10;
+        int prec = dto.getTrendLineSwingPrecedingBars() != null && dto.getTrendLineSwingPrecedingBars() >= 0
+                ? dto.getTrendLineSwingPrecedingBars() : 1;
+        int fol = dto.getTrendLineSwingFollowingBars() != null && dto.getTrendLineSwingFollowingBars() >= 0
+                ? dto.getTrendLineSwingFollowingBars() : 1;
+        return TrendLineConfig.builder()
+                .mode(mode)
+                .defaultLookback(lookback)
+                .swingPrecedingBars(prec)
+                .swingFollowingBars(fol)
+                .build();
+    }
+}

backend/src/main/java/com/goldenchart/dto/TrendLineKind.java

@@ -0,0 +1,23 @@
+package com.goldenchart.dto;
+
+/**
+ * 추세선 종류 — 돌파 방향과 짝을 이룸.
+ * <ul>
+ *   <li>{@link #UP} 상승(지지) 추세선 — 스윙 저점(Low) 연결, 저점이 높아져야 함</li>
+ *   <li>{@link #DOWN} 하락(저항) 추세선 — 스윙 고점(High) 연결, 고점이 낮아져야 함</li>
+ * </ul>
+ */
+public enum TrendLineKind {
+    /** 지지선 — TREND_LINE_CROSS_DOWN (하향 돌파) */
+    UP,
+    /** 저항선 — TREND_LINE_CROSS_UP (상향 돌파) */
+    DOWN;
+
+    public static TrendLineKind forCrossUp() {
+        return DOWN;
+    }
+
+    public static TrendLineKind forCrossDown() {
+        return UP;
+    }
+}

backend/src/main/java/com/goldenchart/entity/GcBacktestSettings.java

@@ -132,6 +132,23 @@ public class GcBacktestSettings {
     @Builder.Default
     private String tradeExecutionMode = "BACKTEST_ENGINE";
 
+    /** TWO_POINT | REGRESSION | SWING */
+    @Column(name = "trend_line_mode", nullable = false, length = 20)
+    @Builder.Default
+    private String trendLineMode = "TWO_POINT";
+
+    @Column(name = "trend_line_default_lookback", nullable = false)
+    @Builder.Default
+    private Integer trendLineDefaultLookback = 10;
+
+    @Column(name = "trend_line_swing_preceding_bars", nullable = false)
+    @Builder.Default
+    private Integer trendLineSwingPrecedingBars = 1;
+
+    @Column(name = "trend_line_swing_following_bars", nullable = false)
+    @Builder.Default
+    private Integer trendLineSwingFollowingBars = 1;
+
     @Column(name = "created_at", nullable = false, updatable = false)
     private LocalDateTime createdAt;
 

backend/src/main/java/com/goldenchart/service/BacktestSettingsService.java

@@ -125,6 +125,21 @@ public class BacktestSettingsService {
                 "SCAN_SIGNALS".equals(dto.getTradeExecutionMode())
                         ? "SCAN_SIGNALS"
                         : "BACKTEST_ENGINE");
+        entity.setTrendLineMode(normalizeTrendLineMode(dto.getTrendLineMode()));
+        entity.setTrendLineDefaultLookback(
+                dto.getTrendLineDefaultLookback() != null && dto.getTrendLineDefaultLookback() > 1
+                        ? dto.getTrendLineDefaultLookback() : 10);
+        entity.setTrendLineSwingPrecedingBars(
+                dto.getTrendLineSwingPrecedingBars() != null && dto.getTrendLineSwingPrecedingBars() >= 0
+                        ? dto.getTrendLineSwingPrecedingBars() : 1);
+        entity.setTrendLineSwingFollowingBars(
+                dto.getTrendLineSwingFollowingBars() != null && dto.getTrendLineSwingFollowingBars() >= 0
+                        ? dto.getTrendLineSwingFollowingBars() : 1);
+    }
+
+    private static String normalizeTrendLineMode(String mode) {
+        if ("REGRESSION".equals(mode) || "SWING".equals(mode)) return mode;
+        return "TWO_POINT";
     }
 
     // ── 변환 헬퍼 ─────────────────────────────────────────────────────────────
@@ -157,6 +172,10 @@ public class BacktestSettingsService {
                         "SCAN_SIGNALS".equals(e.getTradeExecutionMode())
                                 ? "SCAN_SIGNALS"
                                 : "BACKTEST_ENGINE")
+                .trendLineMode(normalizeTrendLineMode(e.getTrendLineMode()))
+                .trendLineDefaultLookback(e.getTrendLineDefaultLookback() != null ? e.getTrendLineDefaultLookback() : 10)
+                .trendLineSwingPrecedingBars(e.getTrendLineSwingPrecedingBars() != null ? e.getTrendLineSwingPrecedingBars() : 1)
+                .trendLineSwingFollowingBars(e.getTrendLineSwingFollowingBars() != null ? e.getTrendLineSwingFollowingBars() : 1)
                 .build();
     }
 }

backend/src/main/java/com/goldenchart/service/BacktestingService.java

@@ -132,9 +132,11 @@ public class BacktestingService {
                 series, primaryTf, buyDsl, sellDsl);
 
         String market = req.getSymbol() != null && !req.getSymbol().isBlank() ? req.getSymbol() : null;
+        com.goldenchart.dto.TrendLineConfig trendLineConfig =
+                com.goldenchart.dto.TrendLineConfig.fromSettings(cfg);
         StrategyDslToTa4jAdapter.RuleBuildContext ruleCtx =
                 new StrategyDslToTa4jAdapter.RuleBuildContext(
-                        series, params, visual, market, null, false, seriesOverrides);
+                        series, params, visual, market, null, false, seriesOverrides, trendLineConfig);
         Rule entryRule    = adapter.toRule(buyDsl, ruleCtx);
         Rule baseExitRule = (sellDsl != null && !sellDsl.isNull())
                 ? adapter.toRule(sellDsl, ruleCtx)

backend/src/main/java/com/goldenchart/service/LiveConditionStatusService.java

@@ -4,9 +4,11 @@ import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.goldenchart.dto.BacktestResponse;
+import com.goldenchart.dto.BacktestSettingsDto;
 import com.goldenchart.dto.LiveConditionRowDto;
 import com.goldenchart.dto.LiveConditionStatusDto;
 import com.goldenchart.dto.OhlcvBar;
+import com.goldenchart.dto.TrendLineConfig;
 import com.goldenchart.entity.GcStrategy;
 import com.goldenchart.repository.GcStrategyRepository;
 import com.goldenchart.storage.Ta4jStorage;
@@ -38,6 +40,8 @@ public class LiveConditionStatusService {
             Map.entry("NEQ", "다름(≠)"),
             Map.entry("CROSS_UP", "상향 돌파"),
             Map.entry("CROSS_DOWN", "하향 돌파"),
+            Map.entry("TREND_LINE_CROSS_UP", "추세선 상향 돌파"),
+            Map.entry("TREND_LINE_CROSS_DOWN", "추세선 하향 돌파"),
             Map.entry("SLOPE_UP", "상승 중"),
             Map.entry("LOWEST_LTE", "N봉 최저 ≤"),
             Map.entry("LOWEST_GTE", "N봉 최저 ≥"),
@@ -53,6 +57,27 @@ public class LiveConditionStatusService {
     private final ObjectMapper objectMapper;
     private final DynamicSubscriptionManager subscriptionManager;
     private final StrategyDslTimeframeNormalizer timeframeNormalizer;
+    private final BacktestSettingsService backtestSettingsService;
+
+    private TrendLineConfig trendLineConfigFor(Long userId, String deviceId) {
+        BacktestSettingsDto settings = backtestSettingsService.get(userId, deviceId);
+        return TrendLineConfig.fromSettings(settings);
+    }
+
+    private StrategyDslToTa4jAdapter.RuleBuildContext buildRuleCtx(
+            BarSeries series,
+            Map<String, Map<String, Object>> params,
+            Map<String, Map<String, Object>> visual,
+            String market,
+            Ta4jStorage storage,
+            boolean useConfirmedOnly,
+            Map<String, BarSeries> seriesOverrides,
+            Long userId,
+            String deviceId) {
+        return new StrategyDslToTa4jAdapter.RuleBuildContext(
+                series, params, visual, market, storage, useConfirmedOnly, seriesOverrides,
+                trendLineConfigFor(userId, deviceId));
+    }
 
     @Transactional(readOnly = true)
     public LiveConditionStatusDto evaluate(Long userId, String deviceId,
@@ -104,7 +129,7 @@ public class LiveConditionStatusService {
         }
 
         if (chartBars != null && !chartBars.isEmpty() && chartTimeframe != null && !chartTimeframe.isBlank()) {
-            return evaluateOnChartBars(strategy, market, strategyId, chartBars, chartTimeframe,
+            return evaluateOnChartBars(userId, deviceId, strategy, market, strategyId, chartBars, chartTimeframe,
                     barTimeSec, params, visual);
         }
 
@@ -142,8 +167,8 @@ public class LiveConditionStatusService {
                 wrapper.set("condition", p.condition());
 
                 StrategyDslToTa4jAdapter.RuleBuildContext ctx =
-                        new StrategyDslToTa4jAdapter.RuleBuildContext(
+                        buildRuleCtx(series, params, visual, market, ta4jStorage, false,
-                                series, params, visual, market, ta4jStorage, false, java.util.Map.of());
+                                java.util.Map.of(), userId, deviceId);
                 Rule rule = adapter.toRule(wrapper, ctx);
                 boolean satisfied = rule.isSatisfied(index, null);
                 Double current = adapter.readConditionFieldValue(
@@ -167,9 +192,9 @@ public class LiveConditionStatusService {
 
         // [항목6] 전체 논리 트리 평가 — matchRate 와 달리 AND/OR/NOT 게이트 완전 반영
         Boolean overallEntryMet = evaluateOverallRule(
-                strategy.getBuyConditionJson(), market, params, visual, barTimeSec);
+                strategy.getBuyConditionJson(), market, params, visual, barTimeSec, userId, deviceId);
         Boolean overallExitMet = evaluateOverallRule(
-                strategy.getSellConditionJson(), market, params, visual, barTimeSec);
+                strategy.getSellConditionJson(), market, params, visual, barTimeSec, userId, deviceId);
 
         return LiveConditionStatusDto.builder()
                 .market(market)
@@ -267,6 +292,8 @@ public class LiveConditionStatusService {
      * 차트·백테스트와 동일 OHLCV 로 조건 평가 — Ta4jStorage 와의 불일치 방지.
      */
     private LiveConditionStatusDto evaluateOnChartBars(
+            Long userId,
+            String deviceId,
             GcStrategy strategy,
             String market,
             long strategyId,
@@ -314,8 +341,8 @@ public class LiveConditionStatusService {
                     wrapper.set("condition", p.condition());
 
                     StrategyDslToTa4jAdapter.RuleBuildContext ctx =
-                            new StrategyDslToTa4jAdapter.RuleBuildContext(
+                            buildRuleCtx(series, params, visual, market, null, false,
-                                    series, params, visual, market, null, false, seriesOverrides);
+                                    seriesOverrides, userId, deviceId);
                     Rule rule = adapter.toRule(wrapper, ctx);
                     boolean satisfied = rule.isSatisfied(index, null);
                     Double current = adapter.readConditionFieldValue(
@@ -336,9 +363,11 @@ public class LiveConditionStatusService {
 
             int matchRate = evaluable > 0 ? Math.round(100f * met / evaluable) : 0;
             Boolean overallEntryMet = evaluateOverallRuleOnChart(
-                    buyDsl, primarySeries, seriesOverrides, market, params, visual, barTimeSec);
+                    buyDsl, primarySeries, seriesOverrides, market, params, visual, barTimeSec,
+                    userId, deviceId);
             Boolean overallExitMet = evaluateOverallRuleOnChart(
-                    sellDsl, primarySeries, seriesOverrides, market, params, visual, barTimeSec);
+                    sellDsl, primarySeries, seriesOverrides, market, params, visual, barTimeSec,
+                    userId, deviceId);
 
             return LiveConditionStatusDto.builder()
                     .market(market)
@@ -392,14 +421,16 @@ public class LiveConditionStatusService {
                                                  String market,
                                                  Map<String, Map<String, Object>> params,
                                                  Map<String, Map<String, Object>> visual,
-                                                 Long barTimeSec) {
+                                                 Long barTimeSec,
+                                                 Long userId,
+                                                 String deviceId) {
         if (dsl == null || dsl.isNull()) return null;
         try {
             if (primarySeries == null || primarySeries.isEmpty()) return null;
 
             StrategyDslToTa4jAdapter.RuleBuildContext ctx =
-                    new StrategyDslToTa4jAdapter.RuleBuildContext(
+                    buildRuleCtx(primarySeries, params, visual, market, null, false,
-                            primarySeries, params, visual, market, null, false, seriesOverrides);
+                            seriesOverrides, userId, deviceId);
             Rule rule = adapter.toRule(dsl, ctx);
             int index = OhlcvBarSeriesSupport.resolveBarIndex(primarySeries, barTimeSec);
             return rule.isSatisfied(index, null);
@@ -441,7 +472,9 @@ public class LiveConditionStatusService {
     private Boolean evaluateOverallRule(String conditionJson, String market,
                                         Map<String, Map<String, Object>> params,
                                         Map<String, Map<String, Object>> visual,
-                                        Long barTimeSec) {
+                                        Long barTimeSec,
+                                        Long userId,
+                                        String deviceId) {
         if (conditionJson == null || conditionJson.isBlank()) return null;
         try {
             String normalized = StrategyConditionThresholdNormalizer.normalizeJson(conditionJson, objectMapper);
@@ -461,8 +494,8 @@ public class LiveConditionStatusService {
             if (series.isEmpty()) return null;
 
             StrategyDslToTa4jAdapter.RuleBuildContext ctx =
-                    new StrategyDslToTa4jAdapter.RuleBuildContext(
+                    buildRuleCtx(series, params, visual, market, ta4jStorage, false,
-                            series, params, visual, market, ta4jStorage, false, java.util.Map.of());
+                            java.util.Map.of(), userId, deviceId);
             org.ta4j.core.Rule rule = adapter.toRule(dsl, ctx);
             return rule.isSatisfied(resolveBarIndex(series, barTimeSec), null);
         } catch (Exception e) {
@@ -798,8 +831,8 @@ public class LiveConditionStatusService {
             int startIdx = resolveChartScanStartIndex(primarySeries, evalCount);
 
             StrategyDslToTa4jAdapter.RuleBuildContext ruleCtx =
-                    new StrategyDslToTa4jAdapter.RuleBuildContext(
+                    buildRuleCtx(primarySeries, params, visual, market, null, false,
-                            primarySeries, params, visual, market, null, false, seriesOverrides);
+                            seriesOverrides, userId, deviceId);
             Rule entryRule = (buyDsl != null && !buyDsl.isNull())
                     ? adapter.toRule(buyDsl, ruleCtx)
                     : new org.ta4j.core.rules.BooleanRule(false);

backend/src/main/java/com/goldenchart/service/StrategyDslToTa4jAdapter.java

@@ -1,6 +1,8 @@
 package com.goldenchart.service;
 
 import com.fasterxml.jackson.databind.JsonNode;
+import com.goldenchart.dto.TrendLineConfig;
+import com.goldenchart.dto.TrendLineKind;
 import com.goldenchart.storage.Ta4jStorage;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Component;
@@ -122,20 +124,37 @@ public class StrategyDslToTa4jAdapter {
              * null 이 아니고 비어 있지 않으면 백테스트 모드로 동작하며
              * CrossSeriesRule 에서 타임스탬프 기반 룩업을 수행한다.
              */
-            Map<String, BarSeries> seriesOverrides
+            Map<String, BarSeries> seriesOverrides,
+            /** 추세선 조건(TREND_LINE_CROSS_*) — 전략설정 gc_backtest_settings */
+            TrendLineConfig trendLineConfig
     ) {
         /** visual 미전달 호환 (레거시) */
         public RuleBuildContext(BarSeries primarySeries,
                                 Map<String, Map<String, Object>> indicatorParams,
                                 String market,
                                 Ta4jStorage storage) {
-            this(primarySeries, indicatorParams, Map.of(), market, storage, false, Map.of());
+            this(primarySeries, indicatorParams, Map.of(), market, storage, false, Map.of(), null);
+        }
+
+        public RuleBuildContext(BarSeries primarySeries,
+                                Map<String, Map<String, Object>> indicatorParams,
+                                Map<String, Map<String, Object>> indicatorVisual,
+                                String market,
+                                Ta4jStorage storage,
+                                boolean useConfirmedOnly,
+                                Map<String, BarSeries> seriesOverrides) {
+            this(primarySeries, indicatorParams, indicatorVisual, market, storage,
+                    useConfirmedOnly, seriesOverrides, null);
+        }
+
+        public TrendLineConfig effectiveTrendLineConfig() {
+            return trendLineConfig != null ? trendLineConfig : TrendLineConfig.defaults();
         }
 
         /** primarySeries 만 교체하고 나머지 필드 복사 (하위 컨텍스트 생성용) */
         public RuleBuildContext withPrimary(BarSeries newPrimary) {
             return new RuleBuildContext(newPrimary, indicatorParams, indicatorVisual,
-                    market, storage, useConfirmedOnly, seriesOverrides);
+                    market, storage, useConfirmedOnly, seriesOverrides, trendLineConfig);
         }
 
         /** MA1~11 슬롯 → period1~11 (SMA 보조지표 설정) */
@@ -170,20 +189,20 @@ public class StrategyDslToTa4jAdapter {
 
     public Rule toRule(JsonNode node, BarSeries series,
                        Map<String, Map<String, Object>> indicatorParams) {
-        return toRule(node, new RuleBuildContext(series, indicatorParams, Map.of(), null, null, false, Map.of()));
+        return toRule(node, new RuleBuildContext(series, indicatorParams, Map.of(), null, null, false, Map.of(), null));
     }
 
     public Rule toRule(JsonNode node, BarSeries series,
                        Map<String, Map<String, Object>> indicatorParams,
                        String market, Ta4jStorage storage) {
-        return toRule(node, new RuleBuildContext(series, indicatorParams, Map.of(), market, storage, false, Map.of()));
+        return toRule(node, new RuleBuildContext(series, indicatorParams, Map.of(), market, storage, false, Map.of(), null));
     }
 
     public Rule toRule(JsonNode node, BarSeries series,
                        Map<String, Map<String, Object>> indicatorParams,
                        Map<String, Map<String, Object>> indicatorVisual,
                        String market, Ta4jStorage storage) {
-        return toRule(node, new RuleBuildContext(series, indicatorParams, indicatorVisual, market, storage, false, Map.of()));
+        return toRule(node, new RuleBuildContext(series, indicatorParams, indicatorVisual, market, storage, false, Map.of(), null));
     }
 
     /**
@@ -194,7 +213,7 @@ public class StrategyDslToTa4jAdapter {
                        Map<String, Map<String, Object>> indicatorParams,
                        Map<String, BarSeries> seriesOverrides) {
         return toRule(node, new RuleBuildContext(series, indicatorParams, Map.of(), null, null, false,
-                seriesOverrides != null ? seriesOverrides : Map.of()));
+                seriesOverrides != null ? seriesOverrides : Map.of(), null));
     }
 
     /**
@@ -204,7 +223,7 @@ public class StrategyDslToTa4jAdapter {
                                     Map<String, Map<String, Object>> indicatorParams,
                                     Map<String, Map<String, Object>> indicatorVisual,
                                     String market, Ta4jStorage storage) {
-        return toRule(node, new RuleBuildContext(series, indicatorParams, indicatorVisual, market, storage, true, Map.of()));
+        return toRule(node, new RuleBuildContext(series, indicatorParams, indicatorVisual, market, storage, true, Map.of(), null));
     }
 
     public Rule toRule(JsonNode node, RuleBuildContext ctx) {
@@ -508,6 +527,15 @@ public class StrategyDslToTa4jAdapter {
                 // 직전봉≤·현재봉> 교차 (차트·CrossTimeframeCompositeRule 과 동일, NaN 구간 제외)
                 case "CROSS_UP"   -> buildCrossUpRule(left, right);
                 case "CROSS_DOWN" -> buildCrossDownRule(left, right);
+                case "TREND_LINE_CROSS_UP", "TREND_LINE_CROSS_DOWN" -> {
+                    int lb = cond.path("lookbackPeriod").asInt(0);
+                    if (lb <= 0) lb = ctx.effectiveTrendLineConfig().getDefaultLookback();
+                    lb = Math.max(2, lb);
+                    boolean priceScale = isTrendLinePriceScaleField(leftField);
+                    yield "TREND_LINE_CROSS_UP".equals(condType)
+                            ? buildTrendLineCrossUpRule(left, series, lb, ctx.effectiveTrendLineConfig(), priceScale)
+                            : buildTrendLineCrossDownRule(left, series, lb, ctx.effectiveTrendLineConfig(), priceScale);
+                }
                 case "SLOPE_UP"   -> buildSlopeTrendRule(left, true, candleRangeMode, candleRange, slopePeriod);
                 case "SLOPE_DOWN" -> buildSlopeTrendRule(left, false, candleRangeMode, candleRange, slopePeriod);
                 case "DIFF_GT"  -> {
@@ -1657,6 +1685,66 @@ public class StrategyDslToTa4jAdapter {
         };
     }
 
+    /**
+     * N봉 추세선 돌파 — [i−N, i−1] 구간으로 고정된 동일 선을 i−1·i 에서 평가.
+     * (일반 CROSS 와 달리 추세선 창이 봉마다 밀리지 않음)
+     */
+    private Rule buildTrendLineCrossUpRule(
+            Indicator<Num> left, BarSeries series, int lookback, TrendLineConfig config, boolean priceScale) {
+        return new Rule() {
+            @Override
+            public boolean isSatisfied(int index, TradingRecord tradingRecord) {
+                if (index < 1) return false;
+                TrendLineKind kind = TrendLineKind.forCrossUp();
+                double linePrev = TrendLineMath.valueAtEval(
+                        series, left, index, index - 1, lookback, config, kind, priceScale);
+                double lineCurr = TrendLineMath.valueAtEval(
+                        series, left, index, index, lookback, config, kind, priceScale);
+                if (!Double.isFinite(linePrev) || !Double.isFinite(lineCurr)) return false;
+                Num l0 = left.getValue(index - 1);
+                Num l1 = left.getValue(index);
+                if (l0 == null || l1 == null || l0.isNaN() || l1.isNaN()) return false;
+                Num r0 = series.numFactory().numOf(linePrev);
+                Num r1 = series.numFactory().numOf(lineCurr);
+                return l0.isLessThanOrEqual(r0) && l1.isGreaterThan(r1);
+            }
+        };
+    }
+
+    private Rule buildTrendLineCrossDownRule(
+            Indicator<Num> left, BarSeries series, int lookback, TrendLineConfig config, boolean priceScale) {
+        return new Rule() {
+            @Override
+            public boolean isSatisfied(int index, TradingRecord tradingRecord) {
+                if (index < 1) return false;
+                TrendLineKind kind = TrendLineKind.forCrossDown();
+                double linePrev = TrendLineMath.valueAtEval(
+                        series, left, index, index - 1, lookback, config, kind, priceScale);
+                double lineCurr = TrendLineMath.valueAtEval(
+                        series, left, index, index, lookback, config, kind, priceScale);
+                if (!Double.isFinite(linePrev) || !Double.isFinite(lineCurr)) return false;
+                Num l0 = left.getValue(index - 1);
+                Num l1 = left.getValue(index);
+                if (l0 == null || l1 == null || l0.isNaN() || l1.isNaN()) return false;
+                Num r0 = series.numFactory().numOf(linePrev);
+                Num r1 = series.numFactory().numOf(lineCurr);
+                return l0.isGreaterThanOrEqual(r0) && l1.isLessThan(r1);
+            }
+        };
+    }
+
+    /** 추세선 — 가격축(OHLC·MA 등) vs 오실레이터 */
+    private static boolean isTrendLinePriceScaleField(String field) {
+        if (field == null || field.isBlank() || "NONE".equalsIgnoreCase(field)) return true;
+        String f = field.toUpperCase();
+        return f.contains("CLOSE") || f.contains("PRICE") || f.contains("HIGH") || f.contains("LOW")
+                || f.contains("OPEN") || f.contains("MA") || f.contains("EMA")
+                || f.contains("UPPER") || f.contains("MIDDLE") || f.contains("LOWER")
+                || f.contains("BAND") || f.contains("DC_") || f.contains("VWAP")
+                || f.contains("CONVERSION") || f.contains("BASE") || f.contains("SPAN")
+                || f.contains("LAGGING") || f.contains("CLOUD");
+    }
+
     /**
      * CCI_VALUE_20 등 좌측 본선 기간과 신호선(CCI_SIGNAL) 본선 기간을 일치시킨다.
      * sidePeriod(우측)는 신호 SMA 길이용 — 본선 CCI/RSI/TRIX 기간으로 쓰지 않는다.

backend/src/main/java/com/goldenchart/service/TrendLineMath.java

@@ -0,0 +1,294 @@
+package com.goldenchart.service;
+
+import com.goldenchart.dto.TrendLineConfig;
+import com.goldenchart.dto.TrendLineKind;
+import org.ta4j.core.BarSeries;
+import org.ta4j.core.Indicator;
+import org.ta4j.core.num.Num;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * N봉 구간 추세선 — 스윙 피벗(Pivot) 기준.
+ * <p>
+ * fit 구간 [anchor−N, anchor−1] (현재 봉 제외).
+ * 상승 추세선(UP): 스윙 저점 2개(Low, Low₂&gt;Low₁) · 하락 추세선(DOWN): 스윙 고점 2개(High, High₂&lt;High₁).
+ * anchor 봉 i 돌파 판정: 동일 선을 i−1·i 에 extrapolation.
+ * 차트 선분: 피벗 A → anchor(i)까지 연장.
+ */
+public final class TrendLineMath {
+
+    private TrendLineMath() {}
+
+    private record PivotPair(int indexA, double yA, int indexB, double yB) {}
+
+    /** anchor 봉 기준 [anchor−N, anchor−1] 추세선을 evalIndex 에서 평가 */
+    public static double valueAtEval(
+            BarSeries series,
+            Indicator<Num> source,
+            int anchorIndex,
+            int evalIndex,
+            int lookback,
+            TrendLineConfig config,
+            TrendLineKind kind,
+            boolean priceScale) {
+        if (series == null || source == null || config == null || kind == null
+                || anchorIndex < 1 || lookback < 2) {
+            return Double.NaN;
+        }
+        int start = anchorIndex - lookback;
+        int end = anchorIndex - 1;
+        if (start < series.getBeginIndex() || end < start) return Double.NaN;
+
+        PivotPair pivots = resolvePivots(series, source, start, end, config, kind, priceScale);
+        if (pivots != null) {
+            return lineAt(pivots, evalIndex);
+        }
+        return fallbackValueAt(series, source, start, end, evalIndex, config, kind, priceScale);
+    }
+
+    /** anchor = index — i 봉 돌파 판정용 */
+    public static double valueAt(
+            BarSeries series,
+            Indicator<Num> source,
+            int index,
+            int lookback,
+            TrendLineConfig config,
+            TrendLineKind kind,
+            boolean priceScale) {
+        return valueAtEval(series, source, index, index, lookback, config, kind, priceScale);
+    }
+
+    /** 시그널 차트용 — 피벗 기준 fit 후 index(시그널 봉)까지 연장 */
+    public record Segment(long startTimeSec, double startPrice, long endTimeSec, double endPrice) {}
+
+    public static Segment segmentAt(
+            BarSeries series,
+            Indicator<Num> source,
+            int index,
+            int lookback,
+            TrendLineConfig config,
+            TrendLineKind kind,
+            boolean priceScale) {
+        if (series == null || source == null || config == null || kind == null
+                || index < 1 || lookback < 2) {
+            return null;
+        }
+        int start = index - lookback;
+        int end = index - 1;
+        if (start < series.getBeginIndex() || end < start) return null;
+
+        PivotPair pivots = resolvePivots(series, source, start, end, config, kind, priceScale);
+        if (pivots != null) {
+            double yAt = lineAt(pivots, index);
+            if (!Double.isFinite(yAt)) return null;
+            return new Segment(
+                    barTimeSec(series, pivots.indexA()), pivots.yA(),
+                    barTimeSec(series, index), yAt);
+        }
+        return fallbackSegment(series, source, start, end, index, config, kind, priceScale);
+    }
+
+    // ── 피벗 선정 ───────────────────────────────────────────────────────────
+
+    private static PivotPair resolvePivots(
+            BarSeries series,
+            Indicator<Num> source,
+            int start,
+            int end,
+            TrendLineConfig config,
+            TrendLineKind kind,
+            boolean priceScale) {
+        int kLeft = Math.max(0, config.getSwingPrecedingBars());
+        int kRight = Math.max(0, config.getSwingFollowingBars());
+        List<Integer> swings = collectSwingIndices(series, source, start, end, kLeft, kRight, kind, priceScale);
+        if (swings.size() < 2) return null;
+
+        int swingA = swings.get(0);
+        for (int j = 1; j < swings.size(); j++) {
+            int swingB = swings.get(j);
+            if (swingB <= swingA) continue;
+            double yA = yAtPivot(series, source, swingA, kind, priceScale);
+            double yB = yAtPivot(series, source, swingB, kind, priceScale);
+            if (!Double.isFinite(yA) || !Double.isFinite(yB)) continue;
+            if (kind == TrendLineKind.UP && yB > yA) {
+                return new PivotPair(swingA, yA, swingB, yB);
+            }
+            if (kind == TrendLineKind.DOWN && yB < yA) {
+                return new PivotPair(swingA, yA, swingB, yB);
+            }
+        }
+        return null;
+    }
+
+    private static List<Integer> collectSwingIndices(
+            BarSeries series,
+            Indicator<Num> source,
+            int start,
+            int end,
+            int kLeft,
+            int kRight,
+            TrendLineKind kind,
+            boolean priceScale) {
+        List<Integer> out = new ArrayList<>();
+        for (int i = start + kLeft; i <= end - kRight; i++) {
+            boolean isSwing = kind == TrendLineKind.UP
+                    ? isSwingLow(series, source, i, kLeft, kRight, priceScale)
+                    : isSwingHigh(series, source, i, kLeft, kRight, priceScale);
+            if (isSwing) out.add(i);
+        }
+        return out;
+    }
+
+    private static double yAtPivot(
+            BarSeries series, Indicator<Num> source, int index, TrendLineKind kind, boolean priceScale) {
+        if (priceScale) {
+            return kind == TrendLineKind.UP
+                    ? series.getBar(index).getLowPrice().doubleValue()
+                    : series.getBar(index).getHighPrice().doubleValue();
+        }
+        Double v = numAt(source, index);
+        return v != null ? v : Double.NaN;
+    }
+
+    private static boolean isSwingLow(
+            BarSeries series, Indicator<Num> source, int i, int prec, int fol, boolean priceScale) {
+        double low = priceScale
+                ? series.getBar(i).getLowPrice().doubleValue()
+                : requireNum(source, i);
+        if (!Double.isFinite(low)) return false;
+        for (int j = i - prec; j <= i + fol; j++) {
+            if (j == i) continue;
+            if (j < series.getBeginIndex() || j > series.getEndIndex()) return false;
+            double v = priceScale
+                    ? series.getBar(j).getLowPrice().doubleValue()
+                    : requireNum(source, j);
+            if (!Double.isFinite(v) || v < low) return false;
+        }
+        return true;
+    }
+
+    private static boolean isSwingHigh(
+            BarSeries series, Indicator<Num> source, int i, int prec, int fol, boolean priceScale) {
+        double high = priceScale
+                ? series.getBar(i).getHighPrice().doubleValue()
+                : requireNum(source, i);
+        if (!Double.isFinite(high)) return false;
+        for (int j = i - prec; j <= i + fol; j++) {
+            if (j == i) continue;
+            if (j < series.getBeginIndex() || j > series.getEndIndex()) return false;
+            double v = priceScale
+                    ? series.getBar(j).getHighPrice().doubleValue()
+                    : requireNum(source, j);
+            if (!Double.isFinite(v) || v > high) return false;
+        }
+        return true;
+    }
+
+    private static double lineAt(PivotPair p, int evalIndex) {
+        if (p.indexB() == p.indexA()) return p.yA();
+        double t = (evalIndex - p.indexA()) / (double) (p.indexB() - p.indexA());
+        return p.yA() + (p.yB() - p.yA()) * t;
+    }
+
+    // ── 모드별 폴백 (피벗 2개 미충족 시) ─────────────────────────────────────
+
+    private static double fallbackValueAt(
+            BarSeries series,
+            Indicator<Num> source,
+            int start,
+            int end,
+            int evalIndex,
+            TrendLineConfig config,
+            TrendLineKind kind,
+            boolean priceScale) {
+        if (TrendLineConfig.MODE_SWING.equals(normalizeMode(config.getMode()))) {
+            return Double.NaN;
+        }
+        if (TrendLineConfig.MODE_REGRESSION.equals(normalizeMode(config.getMode()))) {
+            return regressionAt(series, source, start, end, evalIndex, kind, priceScale);
+        }
+        return twoPointAt(series, source, start, end, evalIndex, kind, priceScale);
+    }
+
+    private static Segment fallbackSegment(
+            BarSeries series,
+            Indicator<Num> source,
+            int start,
+            int end,
+            int anchorIndex,
+            TrendLineConfig config,
+            TrendLineKind kind,
+            boolean priceScale) {
+        if (TrendLineConfig.MODE_SWING.equals(normalizeMode(config.getMode()))) {
+            return null;
+        }
+        double y0 = yAtEndpoint(series, source, start, kind, priceScale);
+        if (!Double.isFinite(y0)) return null;
+        double yAt = fallbackValueAt(series, source, start, end, anchorIndex, config, kind, priceScale);
+        if (!Double.isFinite(yAt)) return null;
+        return new Segment(barTimeSec(series, start), y0, barTimeSec(series, anchorIndex), yAt);
+    }
+
+    private static double yAtEndpoint(
+            BarSeries series, Indicator<Num> source, int index, TrendLineKind kind, boolean priceScale) {
+        return yAtPivot(series, source, index, kind, priceScale);
+    }
+
+    private static double twoPointAt(
+            BarSeries series, Indicator<Num> source, int start, int end, int evalIndex,
+            TrendLineKind kind, boolean priceScale) {
+        double y0 = yAtEndpoint(series, source, start, kind, priceScale);
+        double y1 = yAtEndpoint(series, source, end, kind, priceScale);
+        if (!Double.isFinite(y0) || !Double.isFinite(y1) || end == start) return Double.NaN;
+        double t = (evalIndex - start) / (double) (end - start);
+        return y0 + (y1 - y0) * t;
+    }
+
+    private static double regressionAt(
+            BarSeries series, Indicator<Num> source, int start, int end, int evalIndex,
+            TrendLineKind kind, boolean priceScale) {
+        double sumX = 0, sumY = 0, sumXY = 0, sumXX = 0;
+        int count = 0;
+        for (int i = start; i <= end; i++) {
+            double y = yAtEndpoint(series, source, i, kind, priceScale);
+            if (!Double.isFinite(y)) continue;
+            double x = i - start;
+            sumX += x;
+            sumY += y;
+            sumXY += x * y;
+            sumXX += x * x;
+            count++;
+        }
+        if (count < 2) return Double.NaN;
+        double denom = count * sumXX - sumX * sumX;
+        if (Math.abs(denom) < 1e-12) return Double.NaN;
+        double b = (count * sumXY - sumX * sumY) / denom;
+        double a = (sumY - b * sumX) / count;
+        return a + b * (evalIndex - start);
+    }
+
+    private static String normalizeMode(String mode) {
+        if (TrendLineConfig.MODE_REGRESSION.equals(mode)) return TrendLineConfig.MODE_REGRESSION;
+        if (TrendLineConfig.MODE_SWING.equals(mode)) return TrendLineConfig.MODE_SWING;
+        return TrendLineConfig.MODE_TWO_POINT;
+    }
+
+    private static double requireNum(Indicator<Num> source, int index) {
+        Double v = numAt(source, index);
+        return v != null ? v : Double.NaN;
+    }
+
+    private static Double numAt(Indicator<Num> source, int index) {
+        if (index < 0) return null;
+        Num n = source.getValue(index);
+        if (n == null) return null;
+        double v = n.doubleValue();
+        return Double.isFinite(v) ? v : null;
+    }
+
+    private static long barTimeSec(BarSeries series, int index) {
+        return series.getBar(index).getEndTime().getEpochSecond();
+    }
+}

backend/src/main/java/com/goldenchart/service/TrendLineValueIndicator.java

@@ -0,0 +1,51 @@
+package com.goldenchart.service;
+
+import com.goldenchart.dto.TrendLineConfig;
+import com.goldenchart.dto.TrendLineKind;
+import org.ta4j.core.BarSeries;
+import org.ta4j.core.Indicator;
+import org.ta4j.core.indicators.AbstractIndicator;
+import org.ta4j.core.num.Num;
+
+import static org.ta4j.core.num.NaN.NaN;
+
+/** bar index 에서 N봉 추세선 Y값 — left 지표·종가와 CROSS 비교용 */
+public class TrendLineValueIndicator extends AbstractIndicator<Num> {
+
+    private final Indicator<Num> source;
+    private final BarSeries series;
+    private final int lookback;
+    private final TrendLineConfig config;
+    private final TrendLineKind kind;
+    private final boolean priceScale;
+
+    public TrendLineValueIndicator(
+            Indicator<Num> source,
+            BarSeries series,
+            int lookback,
+            TrendLineConfig config,
+            TrendLineKind kind,
+            boolean priceScale) {
+        super(series);
+        this.source = source;
+        this.series = series;
+        this.lookback = Math.max(2, lookback);
+        this.config = config != null ? config : TrendLineConfig.defaults();
+        this.kind = kind != null ? kind : TrendLineKind.DOWN;
+        this.priceScale = priceScale;
+    }
+
+    @Override
+    public Num getValue(int index) {
+        double v = TrendLineMath.valueAt(series, source, index, lookback, config, kind, priceScale);
+        if (!Double.isFinite(v)) {
+            return NaN;
+        }
+        return series.numFactory().numOf(v);
+    }
+
+    @Override
+    public int getCountOfUnstableBars() {
+        return lookback + 1;
+    }
+}

backend/src/main/resources/db/migration/V71__backtest_trend_line_settings.sql

@@ -0,0 +1,7 @@
+-- 추세선 전략 조건 — 백테스트/전략평가 공통 설정
+ALTER TABLE gc_backtest_settings
+    ADD COLUMN trend_line_mode VARCHAR(20) NOT NULL DEFAULT 'TWO_POINT'
+        COMMENT 'TWO_POINT | REGRESSION | SWING',
+    ADD COLUMN trend_line_default_lookback INT NOT NULL DEFAULT 10,
+    ADD COLUMN trend_line_swing_preceding_bars INT NOT NULL DEFAULT 1,
+    ADD COLUMN trend_line_swing_following_bars INT NOT NULL DEFAULT 1;

backend/src/test/java/com/goldenchart/service/TrendLineCrossRuleTest.java

@@ -0,0 +1,179 @@
+package com.goldenchart.service;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.goldenchart.dto.TrendLineConfig;
+import com.goldenchart.dto.TrendLineKind;
+import org.junit.jupiter.api.Test;
+import org.ta4j.core.BarSeries;
+import org.ta4j.core.BaseBarSeriesBuilder;
+import org.ta4j.core.Rule;
+import org.ta4j.core.TradingRecord;
+import org.ta4j.core.indicators.helpers.ClosePriceIndicator;
+import org.ta4j.core.num.DecimalNum;
+import org.ta4j.core.num.Num;
+
+import java.time.Duration;
+import java.time.Instant;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/** N봉 추세선 돌파 — 스윙 피벗 (상승 지지 / 하락 저항) */
+class TrendLineCrossRuleTest {
+
+    private final StrategyDslToTa4jAdapter adapter = new StrategyDslToTa4jAdapter();
+    private final ObjectMapper om = new ObjectMapper();
+
+    @Test
+    void trendLineCrossUp_swingPivot_breaksDescendingResistance() throws Exception {
+        BarSeries series = buildDescendingHighsThenBreakUp();
+        Rule rule = buildTrendLineRule(series, "TREND_LINE_CROSS_UP", 8, TrendLineConfig.builder()
+                .mode(TrendLineConfig.MODE_SWING)
+                .defaultLookback(8)
+                .swingPrecedingBars(1)
+                .swingFollowingBars(1)
+                .build());
+
+        int last = series.getEndIndex();
+        assertTrue(rule.isSatisfied(last, null), "저항(하락) 추세선 상향 돌파");
+        assertFalse(rule.isSatisfied(last - 1, null), "직전 봉은 미돌파");
+    }
+
+    @Test
+    void trendLineCrossDown_swingPivot_breaksAscendingSupport() throws Exception {
+        BarSeries series = buildAscendingLowsThenBreakDown();
+        Rule rule = buildTrendLineRule(series, "TREND_LINE_CROSS_DOWN", 8, TrendLineConfig.builder()
+                .mode(TrendLineConfig.MODE_SWING)
+                .defaultLookback(8)
+                .swingPrecedingBars(1)
+                .swingFollowingBars(1)
+                .build());
+
+        int last = series.getEndIndex();
+        assertTrue(rule.isSatisfied(last, null), "지지(상승) 추세선 하향 돌파");
+    }
+
+    @Test
+    void trendLineValueIndicator_matchesMath() {
+        BarSeries series = buildDescendingHighsThenBreakUp();
+        ClosePriceIndicator close = new ClosePriceIndicator(series);
+        TrendLineConfig cfg = TrendLineConfig.builder()
+                .mode(TrendLineConfig.MODE_SWING)
+                .defaultLookback(8)
+                .swingPrecedingBars(1)
+                .swingFollowingBars(1)
+                .build();
+        TrendLineValueIndicator ind = new TrendLineValueIndicator(
+                close, series, 8, cfg, TrendLineKind.DOWN, true);
+        int idx = series.getEndIndex();
+        double expected = TrendLineMath.valueAt(series, close, idx, 8, cfg, TrendLineKind.DOWN, true);
+        Num v = ind.getValue(idx);
+        assertEquals(expected, v.doubleValue(), 1e-9);
+    }
+
+    @Test
+    void trendLineCross_usesFixedWindow_notCurrentBarInFit() {
+        BarSeries series = buildDescendingHighsThenBreakUp();
+        ClosePriceIndicator close = new ClosePriceIndicator(series);
+        TrendLineConfig cfg = TrendLineConfig.builder()
+                .mode(TrendLineConfig.MODE_SWING)
+                .defaultLookback(8)
+                .swingPrecedingBars(1)
+                .swingFollowingBars(1)
+                .build();
+        int idx = series.getEndIndex();
+        TrendLineKind kind = TrendLineKind.DOWN;
+
+        double lineAtPrev = TrendLineMath.valueAtEval(series, close, idx, idx - 1, 8, cfg, kind, true);
+        double lineAtCurr = TrendLineMath.valueAtEval(series, close, idx, idx, 8, cfg, kind, true);
+        assertTrue(Double.isFinite(lineAtPrev));
+        assertTrue(Double.isFinite(lineAtCurr));
+
+        double shiftedWrong = TrendLineMath.valueAtEval(series, close, idx - 1, idx - 1, 8, cfg, kind, true);
+        assertNotEquals(lineAtPrev, shiftedWrong, 1e-6,
+                "i−1·i는 동일 [idx−N, idx−1] 창의 추세선이어야 함");
+    }
+
+    @Test
+    void pivotUp_requiresHigherSecondLow() {
+        BarSeries series = buildInvalidUpTrendFlatLows();
+        ClosePriceIndicator close = new ClosePriceIndicator(series);
+        TrendLineConfig cfg = TrendLineConfig.builder()
+                .mode(TrendLineConfig.MODE_SWING)
+                .defaultLookback(8)
+                .swingPrecedingBars(1)
+                .swingFollowingBars(1)
+                .build();
+        int idx = series.getEndIndex();
+        double v = TrendLineMath.valueAtEval(
+                series, close, idx, idx, 8, cfg, TrendLineKind.UP, true);
+        assertTrue(Double.isNaN(v), "두 번째 저점이 더 높지 않으면 피벗 추세선 없음");
+    }
+
+    private Rule buildTrendLineRule(BarSeries series, String condType, int lookback, TrendLineConfig cfg)
+            throws Exception {
+        String json = """
+                {
+                  "type": "CONDITION",
+                  "condition": {
+                    "indicatorType": "MA",
+                    "conditionType": "%s",
+                    "leftField": "CLOSE_PRICE",
+                    "rightField": "NONE",
+                    "lookbackPeriod": %d
+                  }
+                }
+                """.formatted(condType, lookback);
+        var dsl = om.readTree(json);
+        var ctx = new StrategyDslToTa4jAdapter.RuleBuildContext(
+                series, Map.of(), Map.of(), null, null, false, Map.of(), cfg);
+        return adapter.toRule(dsl, ctx);
+    }
+
+    /** 하락 저항선(고점↓) — 마지막 봉 종가 상향 돌파 */
+    private static BarSeries buildDescendingHighsThenBreakUp() {
+        double[] highs = {100, 101, 102, 115, 110, 108, 106, 104, 102, 108, 105, 112};
+        double[] closes = {99, 100, 101, 113, 108, 106, 104, 102, 100, 106, 104, 111};
+        return toSeriesFromHighs(highs, closes);
+    }
+
+    /** 상승 지지선(저점↑) — 마지막 봉 종가 하향 돌파 */
+    private static BarSeries buildAscendingLowsThenBreakDown() {
+        double[] lows = {108, 109, 110, 95, 96, 97, 98, 99, 100, 101, 102, 108};
+        double[] closes = {110, 111, 112, 97, 98, 99, 100, 101, 102, 103, 104, 101};
+        return toSeriesFromLows(lows, closes);
+    }
+
+    /** 두 스윙 저점이 같은 높이 — UP 피벗 불성립 */
+    private static BarSeries buildInvalidUpTrendFlatLows() {
+        double[] lows = {98, 98, 98, 95, 95, 95, 95, 95, 95, 95, 95, 94};
+        double[] closes = {100, 100, 100, 97, 97, 97, 97, 97, 97, 97, 97, 96};
+        return toSeriesFromLows(lows, closes);
+    }
+
+    private static BarSeries toSeriesFromHighs(double[] highs, double[] closes) {
+        BarSeries series = new BaseBarSeriesBuilder().withNumTypeOf(DecimalNum.class).build();
+        Instant t = Instant.parse("2024-01-01T00:00:00Z");
+        for (int i = 0; i < highs.length; i++) {
+            double c = closes[i];
+            double h = highs[i];
+            double l = Math.min(c, h) - 1;
+            series.addBar(t, t.plus(Duration.ofMinutes(1)), c, h, l, c, 1);
+            t = t.plus(Duration.ofMinutes(1));
+        }
+        return series;
+    }
+
+    private static BarSeries toSeriesFromLows(double[] lows, double[] closes) {
+        BarSeries series = new BaseBarSeriesBuilder().withNumTypeOf(DecimalNum.class).build();
+        Instant t = Instant.parse("2024-01-01T00:00:00Z");
+        for (int i = 0; i < lows.length; i++) {
+            double c = closes[i];
+            double l = lows[i];
+            double h = Math.max(c, l) + 1;
+            series.addBar(t, t.plus(Duration.ofMinutes(1)), c, h, l, c, 1);
+            t = t.plus(Duration.ofMinutes(1));
+        }
+        return series;
+    }
+}

frontend/src/components/SettingsPage.tsx

@@ -6,11 +6,15 @@ import React, { useState, useEffect, useCallback } from 'react';
 import type { Theme } from '../types';
 import {
   loadBacktestSettings,
+  saveBacktestSettings,
   saveLiveStrategySettings,
+  type BacktestSettingsDto,
   type LiveStrategySettingsDto,
+  DEFAULT_BACKTEST_SETTINGS,
 } from '../utils/backendApi';
 import { syncStrategyTimeframesFromLayoutIfNeeded } from '../utils/strategyTimeframeSync';
 import { BacktestSettingsPanel } from './BacktestSettingsPanel';
+import TrendLineSettingsFields from './TrendLineSettingsFields';
 import IndicatorMainDefaultsPanel, {
   type IndicatorSaveUiState,
 } from './IndicatorMainDefaultsPanel';
@@ -1366,15 +1370,32 @@ const StrategyPanel: React.FC<StrategyPanelProps> = ({
   );
   const [liveSaving, setLiveSaving] = useState(false);
   const [backtestPositionMode, setBacktestPositionMode] = useState<'LONG_ONLY' | 'SIGNAL_ONLY'>('LONG_ONLY');
+  const [trendLineCfg, setTrendLineCfg] = useState<BacktestSettingsDto>(DEFAULT_BACKTEST_SETTINGS);
+  const [trendLineSaving, setTrendLineSaving] = useState(false);
 
   useEffect(() => {
     void loadBacktestSettings().then(s => {
-      if (s?.positionMode === 'SIGNAL_ONLY' || s?.positionMode === 'LONG_ONLY') {
+      if (s) {
+        setTrendLineCfg(s);
+        if (s.positionMode === 'SIGNAL_ONLY' || s.positionMode === 'LONG_ONLY') {
           setBacktestPositionMode(s.positionMode);
         }
+      }
     });
   }, []);
 
+  const persistTrendLine = useCallback(async (patch: Partial<BacktestSettingsDto>) => {
+    const next = { ...trendLineCfg, ...patch };
+    setTrendLineCfg(next);
+    setTrendLineSaving(true);
+    try {
+      const saved = await saveBacktestSettings(next);
+      if (saved) setTrendLineCfg(saved);
+    } finally {
+      setTrendLineSaving(false);
+    }
+  }, [trendLineCfg]);
+
   useEffect(() => {
     if (liveSettingsProp) setLiveSettings(liveSettingsProp);
   }, [liveSettingsProp]);
@@ -1582,6 +1603,19 @@ const StrategyPanel: React.FC<StrategyPanelProps> = ({
         )}
       </SettingSection>
 
+      {/* ── 추세선 설정 ──────────────────────────────────────────────────── */}
+      <SettingSection title="추세선 설정">
+        <p className="stg-hint" style={{ marginBottom: 12 }}>
+          추세선 돌파 조건에서 이전 N봉 구간 추세선을 계산하는 방식입니다.
+          2점·회귀·스윙 중 하나로 고정되며, 시그널 발생 봉마다 해당 시점의 선으로 평가합니다.
+          {trendLineSaving && <span style={{ marginLeft: 8, color: 'var(--text3)' }}>저장 중…</span>}
+        </p>
+        <TrendLineSettingsFields
+          cfg={trendLineCfg}
+          onChange={patch => { void persistTrendLine(patch); }}
+        />
+      </SettingSection>
+
       {/* ── 리스크 관리 ──────────────────────────────────────────────────── */}
       <SettingSection title="리스크 관리" grid>
         <StgCard label="기본 리스크 비율 (%)" desc="진입 시 포지션당 기본 리스크 비율 (자본 대비).">

frontend/src/components/StrategyEditorPage.tsx

@@ -48,6 +48,8 @@ import {
 import IndicatorPaletteTab from './strategyEditor/IndicatorPaletteTab';
 import TemplatePaletteTab, { type TemplatePaletteRow } from './strategyEditor/TemplatePaletteTab';
 import SidewaysFilterPaletteTab from './strategyEditor/SidewaysFilterPaletteTab';
+import TrendLinePaletteTab from './strategyEditor/TrendLinePaletteTab';
+import { buildTrendLineConditionNode } from '../utils/trendLinePalette';
 import { buildSidewaysFilterNode, loadSidewaysPaletteItems } from '../utils/sidewaysFilterPaletteStorage';
 import {
   BAND_PALETTE_CHIP_ITEMS,
@@ -319,7 +321,7 @@ export default function StrategyEditorPage({
   const [sellCondition, setSellCondition] = useState<LogicNode | null>(null);
   const [signalTab, setSignalTab] = useState<SignalTab>('buy');
   const [rightTab, setRightTab] = useState<'indicators' | 'templates'>('indicators');
-  const [indicatorSubTab, setIndicatorSubTab] = useState<'auxiliary' | 'composite' | 'range'>('auxiliary');
+  const [indicatorSubTab, setIndicatorSubTab] = useState<'auxiliary' | 'composite' | 'range' | 'trendline'>('auxiliary');
   const [auxiliaryPalette, setAuxiliaryPalette] = useState<PaletteItem[]>(() => loadPaletteItems('auxiliary'));
   const [compositePalette, setCompositePalette] = useState<PaletteItem[]>(() => loadPaletteItems('composite'));
   const [sidewaysPalette, setSidewaysPalette] = useState(() => loadSidewaysPaletteItems());
@@ -1436,6 +1438,15 @@ export default function StrategyEditorPage({
     scheduleStrategyPersist();
   }, [DEF, currentRoot, setCurrentRoot, scheduleStrategyPersist, sidewaysPalette]);
 
+  const applyTrendLine = useCallback((item: { indicatorType: string; leftField?: string }, lookback: number) => {
+    const newNode = buildTrendLineConditionNode(item, buySellTab(signalTab), DEF, lookback);
+    handleEditorStateChange(prev => {
+      const root = prev.root;
+      if (!root) return updateBranchRoot(prev, START_NODE_ID, newNode);
+      return updateBranchRoot(prev, START_NODE_ID, mergeAtRoot(root, newNode, false));
+    });
+  }, [signalTab, DEF, handleEditorStateChange]);
+
   const templateRows = useMemo(
     () => buildStrategyTemplatePaletteRows({
       def: DEF,
@@ -2487,6 +2498,16 @@ export default function StrategyEditorPage({
                 >
                   횡보필터
                 </button>
+                <button
+                  type="button"
+                  className={`se-palette-subtab se-palette-subtab--trendline${indicatorSubTab === 'trendline' ? ' se-palette-subtab--on' : ''}`}
+                  onClick={() => {
+                    setIndicatorSubTab('trendline');
+                    setSelectedPaletteKey(null);
+                  }}
+                >
+                  추세
+                </button>
               </div>
               {indicatorSubTab === 'auxiliary' ? (
                 <IndicatorPaletteTab
@@ -2524,7 +2545,7 @@ export default function StrategyEditorPage({
                     applyPaletteItem(item);
                   }}
                 />
-              ) : (
+              ) : indicatorSubTab === 'range' ? (
                 <SidewaysFilterPaletteTab
                   def={DEF}
                   items={sidewaysPalette}
@@ -2541,6 +2562,21 @@ export default function StrategyEditorPage({
                     applySidewaysFilter(item.id);
                   }}
                 />
+              ) : (
+                <TrendLinePaletteTab
+                  signalType={buySellTab(signalTab)}
+                  searchQuery={paletteSearch}
+                  selectedItemId={
+                    selectedPaletteKey?.startsWith('trendline:')
+                      ? selectedPaletteKey.slice('trendline:'.length)
+                      : null
+                  }
+                  onSelectItem={id => setSelectedPaletteKey(id ? paletteKey('trendline', id) : null)}
+                  onAddToCanvas={(item, lookback) => {
+                    selectPalette('trendline', item.id);
+                    applyTrendLine(item, lookback);
+                  }}
+                />
               )}
             </>
           )}

frontend/src/components/TrendLineSettingsFields.tsx

@@ -0,0 +1,103 @@
+/**
+ * 설정 화면 — 전략 설정 · 추세선 조건
+ */
+import React from 'react';
+import type { BacktestSettingsDto } from '../utils/backendApi';
+
+export const TREND_LINE_MODE_OPTIONS = [
+  {
+    value: 'SWING' as const,
+    label: '스윙 피벗 (권장)',
+    desc: 'N봉 내 스윙 고/저점 2개 — 상승=저점↑·하락=고점↓',
+  },
+  {
+    value: 'TWO_POINT' as const,
+    label: '2점 폴백',
+    desc: '피벗 미충족 시 구간 양端(Low/High) 직선',
+  },
+  {
+    value: 'REGRESSION' as const,
+    label: '회귀 폴백',
+    desc: '피벗 미충족 시 N봉 Low/High OLS',
+  },
+];
+
+interface Props {
+  cfg: BacktestSettingsDto;
+  onChange: (patch: Partial<BacktestSettingsDto>) => void;
+}
+
+export const TrendLineSettingsFields: React.FC<Props> = ({ cfg, onChange }) => {
+  const mode = cfg.trendLineMode ?? 'SWING';
+
+  return (
+    <>
+      <div className="stg-row">
+        <div className="stg-row-label">
+          <span className="stg-row-title">추세선 정의</span>
+          <span className="stg-row-desc">
+            매수(상향 돌파)=하락 저항선(스윙 고점↓) · 매도(하향 돌파)=상승 지지선(스윙 저점↑).
+            가격축은 Low/High, 오실레이터는 지표값 기준 스윙을 사용합니다.
+          </span>
+        </div>
+        <select
+          className="stg-select stg-select--wide"
+          value={mode}
+          onChange={e => onChange({ trendLineMode: e.target.value as BacktestSettingsDto['trendLineMode'] })}
+        >
+          {TREND_LINE_MODE_OPTIONS.map(o => (
+            <option key={o.value} value={o.value}>{o.label}</option>
+          ))}
+        </select>
+      </div>
+      <div className="stg-row">
+        <div className="stg-row-label">
+          <span className="stg-row-title">기본 lookback (봉)</span>
+          <span className="stg-row-desc">
+            [i−N, i−1] 구간에서 피벗을 찾고 i 봉까지 연장합니다. 단기 30~50·중기 100~120 권장.
+          </span>
+        </div>
+        <input
+          className="stg-input stg-input--wide"
+          type="number"
+          min={2}
+          max={500}
+          value={cfg.trendLineDefaultLookback ?? 10}
+          onChange={e => onChange({ trendLineDefaultLookback: Number(e.target.value) })}
+        />
+      </div>
+      <div className="stg-row">
+        <div className="stg-row-label">
+          <span className="stg-row-title">스윙 — 좌측 k봉</span>
+          <span className="stg-row-desc">
+            피벗 판정: 해당 봉 Low/High가 좌·우 각 k봉보다 극단적일 때 스윙으로 인정
+          </span>
+        </div>
+        <input
+          className="stg-input stg-input--wide"
+          type="number"
+          min={0}
+          max={20}
+          value={cfg.trendLineSwingPrecedingBars ?? 1}
+          onChange={e => onChange({ trendLineSwingPrecedingBars: Number(e.target.value) })}
+        />
+      </div>
+      <div className="stg-row">
+        <div className="stg-row-label">
+          <span className="stg-row-title">스윙 — 우측 k봉</span>
+          <span className="stg-row-desc">피벗 판정 우측 비교 봉 수 (k)</span>
+        </div>
+        <input
+          className="stg-input stg-input--wide"
+          type="number"
+          min={0}
+          max={20}
+          value={cfg.trendLineSwingFollowingBars ?? 1}
+          onChange={e => onChange({ trendLineSwingFollowingBars: Number(e.target.value) })}
+        />
+      </div>
+    </>
+  );
+};
+
+export default TrendLineSettingsFields;

frontend/src/components/strategyEditor/PaletteChip.tsx

@@ -31,6 +31,11 @@ interface Props {
   stableStrategy?: boolean;
   ichimokuSituation?: boolean;
   secondaryIndicator?: string;
+  /** 추세선 돌파 — 드래그 payload type: trendLine */
+  trendLine?: boolean;
+  trendLineIndicatorType?: string;
+  trendLineLeftField?: string;
+  trendLineLookback?: number;
   selected?: boolean;
   onSelect?: () => void;
   onAdd: () => void;
@@ -38,9 +43,22 @@ interface Props {
 
 export default function PaletteChip({
   type, value, label, desc, color, period, periodValue, shortPeriod, longPeriod,
-  composite = false, stochPair = false, priceExtremeBreakout = false, inflection33 = false, ichimokuBb = false, stableStrategy = false, ichimokuSituation = false, secondaryIndicator, selected = false, onSelect, onAdd,
+  composite = false, stochPair = false, priceExtremeBreakout = false, inflection33 = false, ichimokuBb = false, stableStrategy = false, ichimokuSituation = false, secondaryIndicator,
+  trendLine = false, trendLineIndicatorType, trendLineLeftField, trendLineLookback,
+  selected = false, onSelect, onAdd,
 }: Props) {
-  const buildPayload = (): PaletteDragPayload => ({
+  const buildPayload = (): PaletteDragPayload => {
+    if (trendLine) {
+      return {
+        type: 'trendLine',
+        value,
+        label,
+        indicatorType: trendLineIndicatorType,
+        leftField: trendLineLeftField,
+        lookback: trendLineLookback,
+      };
+    }
+    return {
       type, value, label,
     composite: composite || undefined,
     stochPair: stochPair || undefined,
@@ -53,7 +71,8 @@ export default function PaletteChip({
     period: periodValue,
     shortPeriod,
     longPeriod,
-  });
+    };
+  };
 
   const pointerMode = needsPointerPaletteDrag();
 

frontend/src/components/strategyEditor/StrategyEditorCanvas.tsx

@@ -31,6 +31,7 @@ import {
   type DefType,
 } from '../../utils/strategyEditorShared';
 import { buildSidewaysFilterNode } from '../../utils/sidewaysFilterPaletteStorage';
+import { buildTrendLineConditionNodeFromDrag } from '../../utils/trendLinePalette';
 import {
   isPaletteHtmlDrag,
   isPaletteHtmlDragActive,
@@ -608,11 +609,14 @@ function StrategyEditorCanvasInner({
   }, [setNodes]);
 
   const resolvePaletteDropNode = useCallback((
-    data: { type: string; value: string; label: string; composite?: boolean },
+    data: { type: string; value: string; label: string; composite?: boolean; lookback?: number; indicatorType?: string; leftField?: string },
   ): LogicNode | null => {
     if (data.type === 'sidewaysFilter') {
       return buildSidewaysFilterNode(data.value, def);
     }
+    if (data.type === 'trendLine') {
+      return buildTrendLineConditionNodeFromDrag(data, signalTab, def);
+    }
     return makeNode(data.type, data.value, signalTab, def, makeNodeOptionsFromPalette(data));
   }, [signalTab, def]);
 

frontend/src/components/strategyEditor/StrategyListEditor.tsx

@@ -36,6 +36,7 @@ import LogicGateOpToggle from './LogicGateOpToggle';
 import { formatStartCandleTypesLabel } from '../../utils/strategyStartNodes';
 import { START_NODE_ID } from '../../utils/strategyFlowLayout';
 import { buildSidewaysFilterNode } from '../../utils/sidewaysFilterPaletteStorage';
+import { buildTrendLineConditionNodeFromDrag } from '../../utils/trendLinePalette';
 import {
   clearPaletteDropHighlights,
   findPaletteDropKeyAtPoint,
@@ -403,11 +404,14 @@ export default function StrategyListEditor({
   }, [onEditorStateChange, onOrphansChange, orphans]);
 
   const resolvePaletteNode = useCallback((
-    data: { type: string; value: string; label: string; composite?: boolean },
+    data: { type: string; value: string; label: string; composite?: boolean; lookback?: number; indicatorType?: string; leftField?: string },
   ) => {
     if (data.type === 'sidewaysFilter') {
       return buildSidewaysFilterNode(data.value, def);
     }
+    if (data.type === 'trendLine') {
+      return buildTrendLineConditionNodeFromDrag(data, signalTab, def);
+    }
     return makeNode(data.type, data.value, signalTab, def, makeNodeOptionsFromPalette(data));
   }, [signalTab, def]);
 

frontend/src/components/strategyEditor/TrendLinePaletteTab.tsx

@@ -0,0 +1,79 @@
+import React, { useEffect, useMemo, useState } from 'react';
+import PaletteChip from './PaletteChip';
+import { loadBacktestSettings } from '../../utils/backendApi';
+import {
+  filterTrendLinePaletteItems,
+  type TrendLinePaletteItem,
+} from '../../utils/trendLinePalette';
+
+interface Props {
+  signalType: 'buy' | 'sell';
+  searchQuery: string;
+  selectedItemId: string | null;
+  onSelectItem: (id: string | null) => void;
+  onAddToCanvas: (item: TrendLinePaletteItem, lookback: number) => void;
+}
+
+function trendLinePeriodLabel(lookback: number, signalType: 'buy' | 'sell'): string {
+  const dir = signalType === 'buy' ? '상향' : '하향';
+  return `${lookback}봉 · ${dir}`;
+}
+
+export default function TrendLinePaletteTab({
+  signalType,
+  searchQuery,
+  selectedItemId,
+  onSelectItem,
+  onAddToCanvas,
+}: Props) {
+  const [defaultLookback, setDefaultLookback] = useState(10);
+
+  useEffect(() => {
+    void loadBacktestSettings().then(s => {
+      if (s?.trendLineDefaultLookback != null && s.trendLineDefaultLookback > 1) {
+        setDefaultLookback(s.trendLineDefaultLookback);
+      }
+    });
+  }, []);
+
+  const items = useMemo(
+    () => filterTrendLinePaletteItems(searchQuery),
+    [searchQuery],
+  );
+
+  return (
+    <div className="se-palette-section se-palette-section--trendline se-palette-section--scroll">
+      <div className="se-palette-toolbar">
+        <span className="se-palette-toolbar-title">추세선 돌파</span>
+        <span className="se-palette-toolbar-hint">
+          {signalType === 'buy' ? '매수: 상향 돌파' : '매도: 하향 돌파'}
+        </span>
+      </div>
+
+      <div className="se-palette-grid se-palette-grid--3">
+        {items.map(item => (
+          <PaletteChip
+            key={item.id}
+            type="indicator"
+            value={item.id}
+            label={item.label}
+            desc={item.desc}
+            color="trendline"
+            trendLine
+            trendLineIndicatorType={item.indicatorType}
+            trendLineLeftField={item.leftField}
+            trendLineLookback={defaultLookback}
+            period={trendLinePeriodLabel(defaultLookback, signalType)}
+            selected={selectedItemId === item.id}
+            onSelect={() => onSelectItem(item.id)}
+            onAdd={() => onAddToCanvas(item, defaultLookback)}
+          />
+        ))}
+      </div>
+
+      {items.length === 0 && (
+        <p className="se-palette-empty">검색 결과가 없습니다.</p>
+      )}
+    </div>
+  );
+}

frontend/src/components/strategyEvaluation/StrategyEvaluationChart.tsx

@@ -3,7 +3,7 @@ import ReactDOM from 'react-dom';
 import TradingChart from '../TradingChart';
 import ChartCustomOverlaySettingsModal from '../ChartCustomOverlaySettingsModal';
 import { MarketSearchPanel } from '../MarketSearchPanel';
-import type { ChartType, IndicatorConfig, OHLCVBar, Theme, Timeframe } from '../../types';
+import type { ChartType, IndicatorConfig, OHLCVBar, Theme, Timeframe, Drawing } from '../../types';
 import type { ChartManager } from '../../utils/ChartManager';
 import { useIndicatorSettings } from '../../hooks/useIndicatorSettings';
 import { useAppSettings } from '../../hooks/useAppSettings';
@@ -14,8 +14,10 @@ import {
 import { getIndicatorDef } from '../../utils/indicatorRegistry';
 import { DEFAULT_DISPLAY_TIMEZONE } from '../../utils/timezone';
 import { getKoreanName } from '../../utils/marketNameCache';
-import type { BacktestSignal, StrategyDto } from '../../utils/backendApi';
+import type { BacktestSettingsDto, BacktestSignal, StrategyDto } from '../../utils/backendApi';
 import { fetchStrategyEvaluationSignals } from '../../utils/strategyEvaluationSignals';
+import { buildSignalTrendLineDrawings } from '../../utils/buildSignalTrendLineDrawings';
+import { setIndicatorChartContext } from '../../utils/indicatorRegistry';
 import type { MarketInfo, TickerData } from '../../hooks/useMarketTicker';
 import {
   BACKTEST_DISPLAY_BAR_COUNT,
@@ -197,6 +199,8 @@ const StrategyEvaluationChart: React.FC<Props> = ({
   const [marketSortDir, setMarketSortDir] = useState<MarketSortDir>('desc');
   const [marketFavs, setMarketFavs] = useState<Set<string>>(() => new Set(getFavorites()));
   const [signals, setSignals] = useState<BacktestSignal[]>([]);
+  const [evalSettings, setEvalSettings] = useState<BacktestSettingsDto | null>(null);
+  const [signalDrawings, setSignalDrawings] = useState<Drawing[]>([]);
   const [backtestRunning, setBacktestRunning] = useState(false);
   const [backtestError, setBacktestError] = useState<string | null>(null);
   const [magnifierActive, setMagnifierActive] = useState(false);
@@ -415,7 +419,7 @@ const StrategyEvaluationChart: React.FC<Props> = ({
     setBacktestRunning(true);
     setBacktestError(null);
     try {
-      const { signals: nextSignals } = await fetchStrategyEvaluationSignals({
+      const result = await fetchStrategyEvaluationSignals({
         strategyId: strategy.id,
         strategy,
         market,
@@ -426,7 +430,8 @@ const StrategyEvaluationChart: React.FC<Props> = ({
         useDraftDsl,
       });
       if (gen !== backtestGenRef.current) return;
-      setSignals(nextSignals);
+      setEvalSettings(result.settings);
+      setSignals(result.signals);
       applyMarkers();
     } catch (e) {
       if (gen !== backtestGenRef.current) return;
@@ -461,6 +466,29 @@ const StrategyEvaluationChart: React.FC<Props> = ({
     onSignalsChange?.(signals);
   }, [signals, onSignalsChange]);
 
+  useEffect(() => {
+    setIndicatorChartContext(market, timeframe);
+    if (!strategy || bars.length === 0) {
+      setSignalDrawings([]);
+      return;
+    }
+    if (selectedBarIndex < 0 || selectedBarIndex >= bars.length) {
+      setSignalDrawings([]);
+      return;
+    }
+    let cancelled = false;
+    void buildSignalTrendLineDrawings({
+      bars,
+      barIndex: selectedBarIndex,
+      strategy,
+      settings: evalSettings,
+      getParams,
+    }).then(drawings => {
+      if (!cancelled) setSignalDrawings(drawings);
+    });
+    return () => { cancelled = true; };
+  }, [bars, strategy, evalSettings, getParams, market, timeframe, selectedBarIndex]);
+
   useEffect(() => {
     onBacktestRunningChange?.(backtestRunning);
   }, [backtestRunning, onBacktestRunningChange]);
@@ -972,7 +1000,7 @@ const StrategyEvaluationChart: React.FC<Props> = ({
               mode="chart"
               indicators={indicators}
               drawingTool="cursor"
-              drawings={[]}
+              drawings={signalDrawings}
               logScale={false}
               onCrosshair={() => {}}
               onManagerReady={onManagerReady}

frontend/src/components/strategyEvaluation/StrategyEvaluationIndicatorPalettePanel.tsx

@@ -5,6 +5,7 @@ import React, { useMemo, useState } from 'react';
 import PaletteChip from '../strategyEditor/PaletteChip';
 import IndicatorPaletteTab from '../strategyEditor/IndicatorPaletteTab';
 import SidewaysFilterPaletteTab from '../strategyEditor/SidewaysFilterPaletteTab';
+import TrendLinePaletteTab from '../strategyEditor/TrendLinePaletteTab';
 import { getIndicatorPeriodLabel } from '../../utils/strategyFlowLayout';
 import {
   BAND_PALETTE_CHIP_ITEMS,
@@ -17,7 +18,7 @@ import type { useStrategyEvaluationEditor } from '../../hooks/useStrategyEvaluat
 
 type EditorApi = Pick<
   ReturnType<typeof useStrategyEvaluationEditor>,
-  'def' | 'applyPalette' | 'applyPaletteItem' | 'applySidewaysFilter'
+  'def' | 'signalTab' | 'applyPalette' | 'applyPaletteItem' | 'applySidewaysFilter' | 'applyTrendLine'
 >;
 
 interface Props {
@@ -35,10 +36,10 @@ function paletteKey(type: string, id: string) {
 }
 
 const StrategyEvaluationIndicatorPalettePanel: React.FC<Props> = ({ editor }) => {
-  const { def, applyPalette, applyPaletteItem, applySidewaysFilter } = editor;
+  const { def, signalTab, applyPalette, applyPaletteItem, applySidewaysFilter, applyTrendLine } = editor;
 
   const [paletteSearch, setPaletteSearch] = useState('');
-  const [indicatorSubTab, setIndicatorSubTab] = useState<'auxiliary' | 'composite' | 'range'>('auxiliary');
+  const [indicatorSubTab, setIndicatorSubTab] = useState<'auxiliary' | 'composite' | 'range' | 'trendline'>('auxiliary');
   const [auxiliaryPalette, setAuxiliaryPalette] = useState<PaletteItem[]>(() => loadPaletteItems('auxiliary'));
   const [compositePalette, setCompositePalette] = useState<PaletteItem[]>(() => loadPaletteItems('composite'));
   const [sidewaysPalette, setSidewaysPalette] = useState(() => loadSidewaysPaletteItems());
@@ -141,6 +142,16 @@ const StrategyEvaluationIndicatorPalettePanel: React.FC<Props> = ({ editor }) =>
         >
           횡보필터
         </button>
+        <button
+          type="button"
+          className={`se-palette-subtab se-palette-subtab--trendline${indicatorSubTab === 'trendline' ? ' se-palette-subtab--on' : ''}`}
+          onClick={() => {
+            setIndicatorSubTab('trendline');
+            setSelectedPaletteKey(null);
+          }}
+        >
+          추세
+        </button>
       </div>
       {indicatorSubTab === 'auxiliary' ? (
         <IndicatorPaletteTab
@@ -178,7 +189,7 @@ const StrategyEvaluationIndicatorPalettePanel: React.FC<Props> = ({ editor }) =>
             applyPaletteItem(item);
           }}
         />
-      ) : (
+      ) : indicatorSubTab === 'range' ? (
         <SidewaysFilterPaletteTab
           def={def as DefType}
           items={sidewaysPalette}
@@ -195,6 +206,21 @@ const StrategyEvaluationIndicatorPalettePanel: React.FC<Props> = ({ editor }) =>
             applySidewaysFilter(item.id);
           }}
         />
+      ) : (
+        <TrendLinePaletteTab
+          signalType={signalTab}
+          searchQuery={paletteSearch}
+          selectedItemId={
+            selectedPaletteKey?.startsWith('trendline:')
+              ? selectedPaletteKey.slice('trendline:'.length)
+              : null
+          }
+          onSelectItem={id => setSelectedPaletteKey(id ? paletteKey('trendline', id) : null)}
+          onAddToCanvas={(item, lookback) => {
+            selectPalette('trendline', item.id);
+            applyTrendLine(item, lookback);
+          }}
+        />
       )}
     </div>
   );

frontend/src/hooks/useStrategyEvaluationEditor.ts

@@ -59,6 +59,7 @@ import {
   buildSidewaysFilterNode,
   loadSidewaysPaletteItems,
 } from '../utils/sidewaysFilterPaletteStorage';
+import { buildTrendLineConditionNode } from '../utils/trendLinePalette';
 import type { PlotDef, HLineDef } from '../utils/indicatorRegistry';
 import type { IndicatorVisualConfig } from './useIndicatorSettings';
 import type { PaletteItem } from '../utils/strategyPaletteStorage';
@@ -490,6 +491,18 @@ export function useStrategyEvaluationEditor({
     });
   }, [def, handleEditorStateChange]);
 
+  const applyTrendLine = useCallback((
+    item: { indicatorType: string; leftField?: string },
+    lookback: number,
+  ) => {
+    const newNode = buildTrendLineConditionNode(item, signalTab, def, lookback);
+    handleEditorStateChange(prev => {
+      const root = prev.root;
+      if (!root) return updateBranchRoot(prev, START_NODE_ID, newNode);
+      return updateBranchRoot(prev, START_NODE_ID, mergeAtRoot(root, newNode, false));
+    });
+  }, [signalTab, def, handleEditorStateChange]);
+
   const applyTemplateForEvaluation = useCallback(async (row: TemplatePaletteRow): Promise<StrategyDto | null> => {
     const payload = buildTemplateEvaluationPayload(row, def);
     if (!payload) {
@@ -541,6 +554,7 @@ export function useStrategyEvaluationEditor({
     applyPalette,
     applyPaletteItem,
     applySidewaysFilter,
+    applyTrendLine,
     applyTemplateForEvaluation,
     saving,
     saveNow,

frontend/src/styles/strategyEditor.css

@@ -1961,6 +1961,15 @@
   color: var(--se-palette-section-range, #f59e0b);
   box-shadow: inset 0 -2px 0 var(--se-palette-section-range, #f59e0b);
 }
+.se-palette-subtab--trendline.se-palette-subtab--on {
+  color: var(--se-palette-section-trendline, #38bdf8);
+  box-shadow: inset 0 -2px 0 var(--se-palette-section-trendline, #38bdf8);
+}
+
+.se-palette-section--trendline h3,
+.se-palette-section--trendline .se-palette-toolbar-title {
+  color: var(--se-palette-section-trendline, #38bdf8);
+}
 
 .se-palette-section--range .se-palette-toolbar-title {
   color: var(--se-palette-section-range, #f59e0b);
@@ -2471,6 +2480,31 @@ body.se-palette-drag-armed .se-palette-section--scroll {
     0 4px 14px color-mix(in srgb, var(--se-palette-ind-accent) 22%, transparent);
 }
 
+/* ── 추세선 돌파 ── */
+.se-palette-card--trendline {
+  --se-palette-trendline-accent: var(--se-palette-section-trendline, #38bdf8);
+  border-color: color-mix(in srgb, var(--se-palette-trendline-accent) 42%, transparent);
+  background: color-mix(in srgb, var(--se-palette-trendline-accent) 10%, var(--bg2));
+  box-shadow:
+    inset 3px 0 0 var(--se-palette-trendline-accent),
+    inset 0 1px 0 color-mix(in srgb, var(--se-text) 6%, transparent);
+  --se-palette-chip-caption: color-mix(in srgb, var(--se-palette-trendline-accent) 34%, #fff 66%);
+  --se-palette-chip-period-value: color-mix(in srgb, var(--se-palette-trendline-accent) 18%, #fff 82%);
+  --se-palette-chip-period-bg: color-mix(in srgb, #000 34%, transparent);
+  --se-palette-chip-period-border: color-mix(in srgb, var(--se-palette-trendline-accent) 40%, transparent);
+}
+.se-palette-card--trendline .se-palette-card-icon {
+  background: color-mix(in srgb, var(--se-palette-trendline-accent) 22%, transparent);
+  color: var(--se-palette-trendline-accent);
+}
+.se-palette-card--trendline:hover {
+  border-color: color-mix(in srgb, var(--se-palette-trendline-accent) 65%, transparent);
+  box-shadow:
+    inset 3px 0 0 var(--se-palette-trendline-accent),
+    inset 0 1px 0 color-mix(in srgb, var(--se-text) 6%, transparent),
+    0 4px 14px color-mix(in srgb, var(--se-palette-trendline-accent) 22%, transparent);
+}
+
 /* ── 복합지표 ── */
 .se-palette-card--composite {
   border-color: color-mix(in srgb, #c084fc 42%, transparent);
@@ -2581,6 +2615,7 @@ body.se-palette-drag-armed .se-palette-section--scroll {
 /* 지표 탭 — 전략·보조 지표 컨트롤 이름 (오렌지) */
 .se-palette-panel .se-palette-card--band .se-palette-card-name,
 .se-palette-panel .se-palette-card--ind .se-palette-card-name,
+.se-palette-panel .se-palette-card--trendline .se-palette-card-name,
 .se-palette-panel .se-palette-card--composite .se-palette-card-name,
 .se-palette-panel .se-palette-card.se-palette-card--range .se-palette-card-name,
 .se-palette-panel .se-palette-card.se-palette-card--range-include .se-palette-card-name,
@@ -2592,6 +2627,7 @@ body.se-palette-drag-armed .se-palette-section--scroll {
 /* 지표 탭 — 설명·기간 보조 텍스트 가독성 */
 .se-palette-panel .se-palette-card--band .se-palette-card-desc,
 .se-palette-panel .se-palette-card--ind .se-palette-card-desc,
+.se-palette-panel .se-palette-card--trendline .se-palette-card-desc,
 .se-palette-panel .se-palette-card--composite .se-palette-card-desc,
 .se-palette-panel .se-palette-card.se-palette-card--range .se-palette-card-desc,
 .se-palette-panel .se-palette-card.se-palette-card--range-include .se-palette-card-desc,
@@ -2607,6 +2643,7 @@ body.se-palette-drag-armed .se-palette-section--scroll {
 
 .se-palette-panel .se-palette-card--band .se-palette-card-period,
 .se-palette-panel .se-palette-card--ind .se-palette-card-period,
+.se-palette-panel .se-palette-card--trendline .se-palette-card-period,
 .se-palette-panel .se-palette-card--composite .se-palette-card-period,
 .se-palette-panel .se-palette-card.se-palette-card--range .se-palette-card-period,
 .se-palette-panel .se-palette-card.se-palette-card--range-include .se-palette-card-period,

frontend/src/styles/strategyEditorTheme.css

@@ -77,6 +77,7 @@
   --se-palette-section-band: #a78bfa;
   --se-palette-section-ind: #34d399;
   --se-palette-section-range: #f59e0b;
+  --se-palette-section-trendline: #38bdf8;
   --se-palette-strategy-name: #f59e0b;
   --se-palette-chip-caption: color-mix(in srgb, var(--se-text-muted) 82%, #fff 18%);
   --se-palette-chip-period-value: color-mix(in srgb, var(--se-text) 90%, #fff 10%);
@@ -221,6 +222,7 @@
   --se-palette-section-band: #7b1fa2;
   --se-palette-section-ind: #2e7d32;
   --se-palette-section-range: #e65100;
+  --se-palette-section-trendline: #0288d1;
   --se-palette-strategy-name: #e65100;
   --se-palette-chip-caption: color-mix(in srgb, var(--se-text) 78%, #000 22%);
   --se-palette-chip-period-value: color-mix(in srgb, var(--se-text) 92%, #000 8%);
@@ -290,6 +292,7 @@
   --se-palette-section-band: #ce93d8;
   --se-palette-section-ind: #69f0ae;
   --se-palette-section-range: #ffb74d;
+  --se-palette-section-trendline: #4fc3f7;
   --se-palette-strategy-name: #ffb74d;
   --se-palette-chip-caption: color-mix(in srgb, var(--se-text-muted) 80%, #fff 20%);
   --se-palette-chip-period-value: color-mix(in srgb, var(--se-text) 88%, #fff 12%);

frontend/src/utils/backendApi.ts

@@ -1440,6 +1440,14 @@ export interface BacktestSettingsDto {
   analysisMethod?:      'MARK_TO_MARKET' | 'REALIZED_ONLY';
   /** SCAN_SIGNALS | BACKTEST_ENGINE — 매매 체결·시그널 생성 방식 */
   tradeExecutionMode?:  'SCAN_SIGNALS' | 'BACKTEST_ENGINE';
+  /** 추세선 조건 — TWO_POINT | REGRESSION | SWING */
+  trendLineMode?:       'TWO_POINT' | 'REGRESSION' | 'SWING';
+  /** 조건 lookbackPeriod 미지정 시 기본 N봉 */
+  trendLineDefaultLookback?: number;
+  /** SWING 모드 — 스윙 저점 판정 좌측 봉 수 */
+  trendLineSwingPrecedingBars?: number;
+  /** SWING 모드 — 스윙 저점 판정 우측 봉 수 */
+  trendLineSwingFollowingBars?: number;
 }
 
 export const DEFAULT_BACKTEST_SETTINGS: BacktestSettingsDto = {
@@ -1465,6 +1473,10 @@ export const DEFAULT_BACKTEST_SETTINGS: BacktestSettingsDto = {
   positionMode:        'LONG_ONLY',
   analysisMethod:      'MARK_TO_MARKET',
   tradeExecutionMode:  'BACKTEST_ENGINE',
+  trendLineMode:       'TWO_POINT',
+  trendLineDefaultLookback: 10,
+  trendLineSwingPrecedingBars: 1,
+  trendLineSwingFollowingBars: 1,
 };
 
 /** 백테스팅 설정 로드 */

frontend/src/utils/buildSignalTrendLineDrawings.ts

@@ -0,0 +1,154 @@
+/**
+ * 전략평가 차트 — 선택 봉 기준 N봉 추세선 Drawing 생성
+ */
+import type { Drawing } from '../types';
+import type { OHLCVBar } from '../types';
+import type { BacktestSettingsDto, StrategyDto } from './backendApi';
+import type { ConditionDSL, LogicNode } from './strategyTypes';
+import { trendLineConfigFromSettings, trendLineSegmentAt, trendLineKindForCross, isTrendLinePriceScaleField } from './trendLineGeometry';
+import { calculateIndicator } from './indicatorRegistry';
+import { DSL_TO_REGISTRY } from './strategyToChartIndicators';
+
+function walkTrendLineConditions(
+  node: LogicNode | null | undefined,
+  side: 'buy' | 'sell',
+  out: Array<{ side: 'buy' | 'sell'; cond: ConditionDSL }>,
+): void {
+  if (!node) return;
+  if (node.type === 'TIMEFRAME') {
+    node.children?.forEach(c => walkTrendLineConditions(c, side, out));
+    return;
+  }
+  if (node.type === 'NOT') {
+    const child = node.children?.[0];
+    if (child) walkTrendLineConditions(child, side, out);
+    return;
+  }
+  if (node.type === 'AND' || node.type === 'OR') {
+    node.children?.forEach(c => walkTrendLineConditions(c, side, out));
+    return;
+  }
+  if ((!node.type || node.type === 'CONDITION') && node.condition) {
+    const ct = node.condition.conditionType;
+    if (ct === 'TREND_LINE_CROSS_UP' || ct === 'TREND_LINE_CROSS_DOWN') {
+      out.push({ side, cond: node.condition });
+    }
+  }
+}
+
+function registryType(dslType: string): string {
+  return DSL_TO_REGISTRY[dslType] ?? dslType;
+}
+
+function isPriceScaleField(field?: string): boolean {
+  if (!field) return true;
+  const f = field.toUpperCase();
+  return f.includes('CLOSE') || f.includes('PRICE') || f.includes('HIGH') || f.includes('LOW')
+    || f.includes('OPEN') || f.includes('MA') || f.includes('EMA')
+    || f.includes('UPPER') || f.includes('MIDDLE') || f.includes('LOWER')
+    || f.includes('BAND') || f.includes('DC_');
+}
+
+async function resolveSourceValues(
+  bars: OHLCVBar[],
+  cond: ConditionDSL,
+  getParams: (type: string) => Record<string, number | string | boolean>,
+): Promise<number[] | null> {
+  const lf = (cond.leftField ?? 'CLOSE_PRICE').toUpperCase();
+  if (lf === 'CLOSE_PRICE' || lf === 'CURRENT') {
+    return bars.map(b => b.close);
+  }
+  if (lf === 'HIGH_PRICE') return bars.map(b => b.high);
+  if (lf === 'LOW_PRICE') return bars.map(b => b.low);
+  if (lf === 'OPEN_PRICE') return bars.map(b => b.open);
+
+  const regType = registryType(cond.indicatorType);
+  try {
+    const params = { ...getParams(regType), ...(cond.params ?? {}) };
+    const { plots } = await calculateIndicator(regType, bars, params);
+    const plotKeys = Object.keys(plots);
+    if (plotKeys.length === 0) return null;
+
+    let plotKey = plotKeys[0]!;
+    if (lf.includes('K') && plots.plot0) plotKey = 'plot0';
+    else if (lf.includes('SIGNAL') && plots.plot1) plotKey = 'plot1';
+    else if (lf.includes('MACD') && plots.plot0) plotKey = 'plot0';
+    else if (lf.includes('UPPER') && plots.plot2) plotKey = 'plot2';
+    else if (lf.includes('LOWER') && plots.plot0) plotKey = 'plot0';
+    else if (lf.includes('MIDDLE') && plots.plot1) plotKey = 'plot1';
+
+    const plot = plots[plotKey as keyof typeof plots];
+    if (!plot || !Array.isArray(plot)) return null;
+    const byTime = new Map(plot.map((p: { time: number; value: number }) => [p.time, p.value]));
+    return bars.map(b => {
+      const v = byTime.get(b.time);
+      return v != null && Number.isFinite(v) ? v : NaN;
+    });
+  } catch {
+    return bars.map(b => b.close);
+  }
+}
+
+/** 선택 봉(barIndex) 기준 추세선만 반환 — 시그널 전체 순회하지 않음 */
+export async function buildSignalTrendLineDrawings(opts: {
+  bars: OHLCVBar[];
+  /** 캔들 선택봉 인덱스 */
+  barIndex: number;
+  strategy: StrategyDto | null;
+  settings?: BacktestSettingsDto | null;
+  getParams: (type: string) => Record<string, number | string | boolean>;
+}): Promise<Drawing[]> {
+  const { bars, barIndex, strategy, settings, getParams } = opts;
+  if (!strategy || bars.length === 0 || barIndex < 0 || barIndex >= bars.length) return [];
+
+  const conditions: Array<{ side: 'buy' | 'sell'; cond: ConditionDSL }> = [];
+  walkTrendLineConditions(strategy.buyCondition as LogicNode | null, 'buy', conditions);
+  walkTrendLineConditions(strategy.sellCondition as LogicNode | null, 'sell', conditions);
+  if (conditions.length === 0) return [];
+
+  const priceConds = conditions.filter(c => isPriceScaleField(c.cond.leftField));
+  if (priceConds.length === 0) return [];
+
+  const config = trendLineConfigFromSettings(settings);
+  const barTimes = bars.map(b => b.time);
+  const drawings: Drawing[] = [];
+
+  const sourceCache = new Map<string, number[]>();
+  for (const { cond } of priceConds) {
+    const key = `${cond.indicatorType}:${cond.leftField}:${JSON.stringify(cond.params ?? {})}`;
+    if (!sourceCache.has(key)) {
+      const values = await resolveSourceValues(bars, cond, getParams);
+      if (values) sourceCache.set(key, values);
+    }
+  }
+
+  for (const { side, cond } of priceConds) {
+    const cacheKey = `${cond.indicatorType}:${cond.leftField}:${JSON.stringify(cond.params ?? {})}`;
+    const sourceValues = sourceCache.get(cacheKey);
+    if (!sourceValues) continue;
+
+    const lookback = Math.max(2, cond.lookbackPeriod ?? config.defaultLookback);
+    const kind = trendLineKindForCross(cond.conditionType, side);
+    const priceScale = isTrendLinePriceScaleField(cond.leftField);
+    const seg = trendLineSegmentAt(
+      barTimes, sourceValues, bars, barIndex, lookback, config, kind, priceScale,
+    );
+    if (!seg) continue;
+
+    const id = `tl-${barIndex}-${side}-${cond.conditionType}-${lookback}-${config.mode}`;
+    drawings.push({
+      id,
+      type: 'trendline',
+      points: [
+        { time: seg.startTimeSec, price: seg.startPrice },
+        { time: seg.endTimeSec, price: seg.endPrice },
+      ],
+      color: side === 'buy' ? '#26a69a' : '#ef5350',
+      lineWidth: 2,
+      style: 'dashed',
+      visible: true,
+    });
+  }
+
+  return drawings;
+}

frontend/src/utils/strategyEditorShared.tsx

@@ -418,6 +418,8 @@ const COND_OPTIONS = [
   { v: 'NEQ',          l: '다름 (!=)'       },
   { v: 'CROSS_UP',     l: '상향 돌파'       },
   { v: 'CROSS_DOWN',   l: '하향 돌파'       },
+  { v: 'TREND_LINE_CROSS_UP',   l: '추세선 상향 돌파' },
+  { v: 'TREND_LINE_CROSS_DOWN', l: '추세선 하향 돌파' },
   { v: 'SLOPE_UP',     l: '상승 기울기'     },
   { v: 'SLOPE_DOWN',   l: '하락 기울기'     },
   { v: 'DIFF_GT',      l: '차이 > 값'       },
@@ -444,6 +446,7 @@ export const getCondOptionsForIndicator = (ind: string): CondTypeOpt[] => {
 
 const COMMON_COND_KEYS = [
   'GT', 'LT', 'GTE', 'LTE', 'EQ', 'NEQ', 'CROSS_UP', 'CROSS_DOWN',
+  'TREND_LINE_CROSS_UP', 'TREND_LINE_CROSS_DOWN',
   'SLOPE_UP', 'SLOPE_DOWN', 'DIFF_GT', 'DIFF_LT', 'HOLD_N_DAYS',
 ];
 
@@ -899,6 +902,10 @@ export const applyCondTypeDefaults = (cond: ConditionDSL, newCondType: string, D
     if (!isValid(updated.leftField)) updated.leftField = def.l;
     updated.rightField = 'NONE';
     updated.slopePeriod = updated.slopePeriod ?? 3;
+  } else if (['TREND_LINE_CROSS_UP', 'TREND_LINE_CROSS_DOWN'].includes(newCondType)) {
+    if (!isValid(updated.leftField)) updated.leftField = def.l;
+    updated.rightField = 'NONE';
+    updated.lookbackPeriod = updated.lookbackPeriod ?? 10;
   } else if (newCondType === 'HOLD_N_DAYS') {
     updated.leftField = 'NONE'; updated.rightField = 'NONE';
     updated.holdDays = updated.holdDays ?? 3;
@@ -1004,6 +1011,11 @@ export const nodeToText = (node: LogicNode, DEF: DefType = DEF_DEFAULTS): string
       const op = c.conditionType === 'LOWEST_LTE' ? '≤' : '≥';
       return `${indName} - 최근 ${n}봉 ${L} 최저 ${op} ${R || '침체선'}`;
     }
+    if (['TREND_LINE_CROSS_UP', 'TREND_LINE_CROSS_DOWN'].includes(c.conditionType)) {
+      const n = c.lookbackPeriod ?? 10;
+      const dir = c.conditionType === 'TREND_LINE_CROSS_UP' ? '상향 돌파' : '하향 돌파';
+      return `${indName} - 이전 ${n}봉 추세선 ${dir} · ${L}`;
+    }
     const rangeClause = formatCandleRangeClause(c);
     if (R && R !== '선택안함') return `${indName} - ${rangeClause}${L} ${C} ${R}`;
     return `${indName} - ${rangeClause}${L} ${C}`;
@@ -1215,11 +1227,12 @@ export const CondEditor: React.FC<CondEditorProps> = ({
   };
 
   const isSlopeType = ['SLOPE_UP','SLOPE_DOWN'].includes(normalized.conditionType);
+  const isTrendLineType = ['TREND_LINE_CROSS_UP', 'TREND_LINE_CROSS_DOWN'].includes(normalized.conditionType);
   const isHoldType  = normalized.conditionType === 'HOLD_N_DAYS';
-  const isLookbackType = ['LOWEST_LTE', 'LOWEST_GTE'].includes(normalized.conditionType);
+  const isLookbackType = ['LOWEST_LTE', 'LOWEST_GTE'].includes(normalized.conditionType) || isTrendLineType;
   const isDiffType  = ['DIFF_GT','DIFF_LT'].includes(normalized.conditionType);
 
-  const rightValue = isSlopeType ? 'NONE' : isHoldType ? 'NONE' : getRightValue();
+  const rightValue = isSlopeType || isTrendLineType ? 'NONE' : isHoldType ? 'NONE' : getRightValue();
 
   const handleCondType = (newType: string) => onChange(applyCondTypeDefaults(normalized, newType, def));
   const handleRight = (v: string) => {

frontend/src/utils/strategyToChartIndicators.ts

@@ -25,7 +25,7 @@ import {
   type StrategyIndicatorRef,
 } from './strategyIndicatorSync';
 
-const DSL_TO_REGISTRY: Record<string, string> = {
+export const DSL_TO_REGISTRY: Record<string, string> = {
   RSI: 'RSI',
   MACD: 'MACD',
   MA: 'SMA',

frontend/src/utils/strategyTypes.ts

@@ -104,6 +104,7 @@ export const CONDITION_LABEL: Record<string, string> = {
   GT: '초과(>)', LT: '미만(<)', GTE: '이상(≥)', LTE: '이하(≤)',
   EQ: '같음(=)', NEQ: '다름(≠)',
   CROSS_UP: '상향 돌파', CROSS_DOWN: '하향 돌파',
+  TREND_LINE_CROSS_UP: '추세선 상향 돌파', TREND_LINE_CROSS_DOWN: '추세선 하향 돌파',
   SLOPE_UP: '상승 중', SLOPE_DOWN: '하락 중',
   DIFF_GT: '차이>값', DIFF_LT: '차이<값',
   HOLD_N_DAYS: 'N일 유지',
@@ -118,7 +119,7 @@ export const CONDITION_LABEL: Record<string, string> = {
   VOLUME_GT_MA_RATIO: '거래량 ≥ MA×비율',
 };
 
-const COMMON_CONDITIONS = ['GT', 'LT', 'GTE', 'LTE', 'EQ', 'NEQ', 'CROSS_UP', 'CROSS_DOWN', 'SLOPE_UP', 'SLOPE_DOWN', 'DIFF_GT', 'DIFF_LT', 'HOLD_N_DAYS'];
+const COMMON_CONDITIONS = ['GT', 'LT', 'GTE', 'LTE', 'EQ', 'NEQ', 'CROSS_UP', 'CROSS_DOWN', 'TREND_LINE_CROSS_UP', 'TREND_LINE_CROSS_DOWN', 'SLOPE_UP', 'SLOPE_DOWN', 'DIFF_GT', 'DIFF_LT', 'HOLD_N_DAYS'];
 const OSCILLATOR_LOOKBACK_CONDITIONS = ['LOWEST_LTE', 'LOWEST_GTE'];
 const OSCILLATOR_CONDITIONS = [...COMMON_CONDITIONS, ...OSCILLATOR_LOOKBACK_CONDITIONS];
 

frontend/src/utils/trendLineGeometry.ts

@@ -0,0 +1,305 @@
+/**
+ * N봉 추세선 — backend TrendLineMath 와 동기 (스윙 피벗).
+ * fit [anchor−N, anchor−1], 상승(UP)=스윙 저점·하락(DOWN)=스윙 고점, anchor까지 연장.
+ */
+import type { BacktestSettingsDto } from './backendApi';
+
+export type TrendLineMode = 'TWO_POINT' | 'REGRESSION' | 'SWING';
+export type TrendLineKind = 'UP' | 'DOWN';
+
+export interface TrendLineConfig {
+  mode: TrendLineMode;
+  defaultLookback: number;
+  swingPrecedingBars: number;
+  swingFollowingBars: number;
+}
+
+export interface TrendLineSegment {
+  startTimeSec: number;
+  startPrice: number;
+  endTimeSec: number;
+  endPrice: number;
+}
+
+interface PivotPair {
+  indexA: number;
+  yA: number;
+  indexB: number;
+  yB: number;
+}
+
+export function trendLineKindForCross(conditionType?: string, side?: 'buy' | 'sell'): TrendLineKind {
+  if (conditionType === 'TREND_LINE_CROSS_UP') return 'DOWN';
+  if (conditionType === 'TREND_LINE_CROSS_DOWN') return 'UP';
+  return side === 'buy' ? 'DOWN' : 'UP';
+}
+
+export function isTrendLinePriceScaleField(field?: string): boolean {
+  if (!field) return true;
+  const f = field.toUpperCase();
+  return f.includes('CLOSE') || f.includes('PRICE') || f.includes('HIGH') || f.includes('LOW')
+    || f.includes('OPEN') || f.includes('MA') || f.includes('EMA')
+    || f.includes('UPPER') || f.includes('MIDDLE') || f.includes('LOWER')
+    || f.includes('BAND') || f.includes('DC_') || f.includes('VWAP')
+    || f.includes('CONVERSION') || f.includes('BASE') || f.includes('SPAN')
+    || f.includes('LAGGING') || f.includes('CLOUD');
+}
+
+export function trendLineConfigFromSettings(
+  settings?: Pick<
+    BacktestSettingsDto,
+    | 'trendLineMode'
+    | 'trendLineDefaultLookback'
+    | 'trendLineSwingPrecedingBars'
+    | 'trendLineSwingFollowingBars'
+  > | null,
+): TrendLineConfig {
+  let mode = settings?.trendLineMode ?? 'SWING';
+  if (mode !== 'TWO_POINT' && mode !== 'REGRESSION' && mode !== 'SWING') {
+    mode = 'SWING';
+  }
+  const defaultLookback =
+    settings?.trendLineDefaultLookback != null && settings.trendLineDefaultLookback > 1
+      ? settings.trendLineDefaultLookback
+      : 10;
+  return {
+    mode,
+    defaultLookback,
+    swingPrecedingBars: settings?.trendLineSwingPrecedingBars ?? 1,
+    swingFollowingBars: settings?.trendLineSwingFollowingBars ?? 1,
+  };
+}
+
+function numAt(values: number[], index: number): number | null {
+  if (index < 0 || index >= values.length) return null;
+  const v = values[index];
+  return Number.isFinite(v) ? v : null;
+}
+
+function yAtPivot(
+  bars: { low: number; high: number }[],
+  sourceValues: number[],
+  index: number,
+  kind: TrendLineKind,
+  priceScale: boolean,
+): number {
+  if (priceScale) {
+    return kind === 'UP' ? bars[index]!.low : bars[index]!.high;
+  }
+  return numAt(sourceValues, index) ?? NaN;
+}
+
+function isSwingLow(
+  bars: { low: number; high: number }[],
+  sourceValues: number[],
+  i: number,
+  prec: number,
+  fol: number,
+  priceScale: boolean,
+): boolean {
+  const low = yAtPivot(bars, sourceValues, i, 'UP', priceScale);
+  if (!Number.isFinite(low)) return false;
+  for (let j = i - prec; j <= i + fol; j++) {
+    if (j === i) continue;
+    if (j < 0 || j >= bars.length) return false;
+    const v = yAtPivot(bars, sourceValues, j, 'UP', priceScale);
+    if (!Number.isFinite(v) || v < low) return false;
+  }
+  return true;
+}
+
+function isSwingHigh(
+  bars: { low: number; high: number }[],
+  sourceValues: number[],
+  i: number,
+  prec: number,
+  fol: number,
+  priceScale: boolean,
+): boolean {
+  const high = yAtPivot(bars, sourceValues, i, 'DOWN', priceScale);
+  if (!Number.isFinite(high)) return false;
+  for (let j = i - prec; j <= i + fol; j++) {
+    if (j === i) continue;
+    if (j < 0 || j >= bars.length) return false;
+    const v = yAtPivot(bars, sourceValues, j, 'DOWN', priceScale);
+    if (!Number.isFinite(v) || v > high) return false;
+  }
+  return true;
+}
+
+function collectSwingIndices(
+  bars: { low: number; high: number }[],
+  sourceValues: number[],
+  start: number,
+  end: number,
+  kLeft: number,
+  kRight: number,
+  kind: TrendLineKind,
+  priceScale: boolean,
+): number[] {
+  const out: number[] = [];
+  for (let i = start + kLeft; i <= end - kRight; i++) {
+    const isSwing = kind === 'UP'
+      ? isSwingLow(bars, sourceValues, i, kLeft, kRight, priceScale)
+      : isSwingHigh(bars, sourceValues, i, kLeft, kRight, priceScale);
+    if (isSwing) out.push(i);
+  }
+  return out;
+}
+
+function resolvePivots(
+  bars: { low: number; high: number }[],
+  sourceValues: number[],
+  start: number,
+  end: number,
+  config: TrendLineConfig,
+  kind: TrendLineKind,
+  priceScale: boolean,
+): PivotPair | null {
+  const kLeft = Math.max(0, config.swingPrecedingBars);
+  const kRight = Math.max(0, config.swingFollowingBars);
+  const swings = collectSwingIndices(bars, sourceValues, start, end, kLeft, kRight, kind, priceScale);
+  if (swings.length < 2) return null;
+
+  const swingA = swings[0]!;
+  for (let j = 1; j < swings.length; j++) {
+    const swingB = swings[j]!;
+    if (swingB <= swingA) continue;
+    const yA = yAtPivot(bars, sourceValues, swingA, kind, priceScale);
+    const yB = yAtPivot(bars, sourceValues, swingB, kind, priceScale);
+    if (!Number.isFinite(yA) || !Number.isFinite(yB)) continue;
+    if (kind === 'UP' && yB > yA) return { indexA: swingA, yA, indexB: swingB, yB };
+    if (kind === 'DOWN' && yB < yA) return { indexA: swingA, yA, indexB: swingB, yB };
+  }
+  return null;
+}
+
+function lineAt(p: PivotPair, evalIndex: number): number {
+  if (p.indexB === p.indexA) return p.yA;
+  const t = (evalIndex - p.indexA) / (p.indexB - p.indexA);
+  return p.yA + (p.yB - p.yA) * t;
+}
+
+function twoPointAt(
+  bars: { low: number; high: number }[],
+  sourceValues: number[],
+  start: number,
+  end: number,
+  evalIndex: number,
+  kind: TrendLineKind,
+  priceScale: boolean,
+): number {
+  const y0 = yAtPivot(bars, sourceValues, start, kind, priceScale);
+  const y1 = yAtPivot(bars, sourceValues, end, kind, priceScale);
+  if (!Number.isFinite(y0) || !Number.isFinite(y1) || end === start) return NaN;
+  const t = (evalIndex - start) / (end - start);
+  return y0 + (y1 - y0) * t;
+}
+
+function regressionAt(
+  bars: { low: number; high: number }[],
+  sourceValues: number[],
+  start: number,
+  end: number,
+  evalIndex: number,
+  kind: TrendLineKind,
+  priceScale: boolean,
+): number {
+  let sumX = 0;
+  let sumY = 0;
+  let sumXY = 0;
+  let sumXX = 0;
+  let count = 0;
+  for (let i = start; i <= end; i++) {
+    const y = yAtPivot(bars, sourceValues, i, kind, priceScale);
+    if (!Number.isFinite(y)) continue;
+    const x = i - start;
+    sumX += x;
+    sumY += y;
+    sumXY += x * y;
+    sumXX += x * x;
+    count++;
+  }
+  if (count < 2) return NaN;
+  const denom = count * sumXX - sumX * sumX;
+  if (Math.abs(denom) < 1e-12) return NaN;
+  const b = (count * sumXY - sumX * sumY) / denom;
+  const a = (sumY - b * sumX) / count;
+  return a + b * (evalIndex - start);
+}
+
+function fallbackValueAt(
+  bars: { low: number; high: number }[],
+  sourceValues: number[],
+  start: number,
+  end: number,
+  evalIndex: number,
+  config: TrendLineConfig,
+  kind: TrendLineKind,
+  priceScale: boolean,
+): number {
+  if (config.mode === 'SWING') return NaN;
+  if (config.mode === 'REGRESSION') {
+    return regressionAt(bars, sourceValues, start, end, evalIndex, kind, priceScale);
+  }
+  return twoPointAt(bars, sourceValues, start, end, evalIndex, kind, priceScale);
+}
+
+export function trendLineValueAtEval(
+  sourceValues: number[],
+  bars: { low: number; high: number }[],
+  anchorIndex: number,
+  evalIndex: number,
+  lookback: number,
+  config: TrendLineConfig,
+  kind: TrendLineKind,
+  priceScale: boolean,
+): number {
+  if (anchorIndex < 1 || lookback < 2) return NaN;
+  const start = anchorIndex - lookback;
+  const end = anchorIndex - 1;
+  if (start < 0 || end < start) return NaN;
+
+  const pivots = resolvePivots(bars, sourceValues, start, end, config, kind, priceScale);
+  if (pivots) return lineAt(pivots, evalIndex);
+  return fallbackValueAt(bars, sourceValues, start, end, evalIndex, config, kind, priceScale);
+}
+
+export function trendLineSegmentAt(
+  barTimes: number[],
+  sourceValues: number[],
+  bars: { low: number; high: number }[],
+  index: number,
+  lookback: number,
+  config: TrendLineConfig,
+  kind: TrendLineKind,
+  priceScale: boolean,
+): TrendLineSegment | null {
+  if (index < 1 || lookback < 2 || sourceValues.length !== barTimes.length) return null;
+  const start = index - lookback;
+  const end = index - 1;
+  if (start < 0 || end < start) return null;
+
+  const pivots = resolvePivots(bars, sourceValues, start, end, config, kind, priceScale);
+  if (pivots) {
+    const yAt = lineAt(pivots, index);
+    if (!Number.isFinite(yAt)) return null;
+    return {
+      startTimeSec: barTimes[pivots.indexA]!,
+      startPrice: pivots.yA,
+      endTimeSec: barTimes[index]!,
+      endPrice: yAt,
+    };
+  }
+
+  if (config.mode === 'SWING') return null;
+  const y0 = yAtPivot(bars, sourceValues, start, kind, priceScale);
+  const yAt = fallbackValueAt(bars, sourceValues, start, end, index, config, kind, priceScale);
+  if (!Number.isFinite(y0) || !Number.isFinite(yAt)) return null;
+  return {
+    startTimeSec: barTimes[start]!,
+    startPrice: y0,
+    endTimeSec: barTimes[index]!,
+    endPrice: yAt,
+  };
+}

frontend/src/utils/trendLinePalette.ts

@@ -0,0 +1,90 @@
+/**
+ * 전략편집기 — 추세선 돌파 조건 팔레트
+ */
+import type { LogicNode } from './strategyTypes';
+import {
+  applyCondTypeDefaults,
+  genId,
+  getDefaultConditionFields,
+  type DefType,
+} from './strategyEditorShared';
+import { initConditionPeriodsInherit } from './conditionPeriods';
+
+export interface TrendLinePaletteItem {
+  id: string;
+  indicatorType: string;
+  label: string;
+  desc: string;
+  leftField?: string;
+}
+
+export const TREND_LINE_PALETTE_ITEMS: TrendLinePaletteItem[] = [
+  { id: 'tl-close', indicatorType: 'MA', label: '종가', desc: '종가 vs N봉 추세선', leftField: 'CLOSE_PRICE' },
+  { id: 'tl-ma', indicatorType: 'MA', label: 'MA', desc: '이동평균 vs N봉 추세선', leftField: 'MA20' },
+  { id: 'tl-ema', indicatorType: 'EMA', label: 'EMA', desc: '지수이동평균 vs N봉 추세선', leftField: 'EMA20' },
+  { id: 'tl-boll', indicatorType: 'BOLLINGER', label: '볼린저', desc: '종가 vs N봉 추세선', leftField: 'CLOSE_PRICE' },
+  { id: 'tl-rsi', indicatorType: 'RSI', label: 'RSI', desc: 'RSI vs N봉 추세선' },
+  { id: 'tl-macd', indicatorType: 'MACD', label: 'MACD', desc: 'MACD선 vs N봉 추세선', leftField: 'MACD_LINE' },
+  { id: 'tl-stoch', indicatorType: 'STOCHASTIC', label: 'Stochastic', desc: '%K vs N봉 추세선', leftField: 'K' },
+  { id: 'tl-cci', indicatorType: 'CCI', label: 'CCI', desc: 'CCI vs N봉 추세선' },
+  { id: 'tl-adx', indicatorType: 'ADX', label: 'ADX', desc: 'ADX vs N봉 추세선' },
+  { id: 'tl-obv', indicatorType: 'OBV', label: 'OBV', desc: 'OBV vs N봉 추세선' },
+];
+
+export function findTrendLinePaletteItem(id: string): TrendLinePaletteItem | undefined {
+  return TREND_LINE_PALETTE_ITEMS.find(i => i.id === id);
+}
+
+export function filterTrendLinePaletteItems(query: string): TrendLinePaletteItem[] {
+  const q = query.trim().toLowerCase();
+  if (!q) return TREND_LINE_PALETTE_ITEMS;
+  return TREND_LINE_PALETTE_ITEMS.filter(
+    i => i.label.toLowerCase().includes(q)
+      || i.desc.toLowerCase().includes(q)
+      || i.indicatorType.toLowerCase().includes(q),
+  );
+}
+
+export function buildTrendLineConditionNode(
+  item: Pick<TrendLinePaletteItem, 'indicatorType' | 'leftField'>,
+  signalType: 'buy' | 'sell',
+  def: DefType,
+  lookback = 10,
+): LogicNode {
+  const defaults = getDefaultConditionFields(item.indicatorType, signalType, def);
+  const condType = signalType === 'buy' ? 'TREND_LINE_CROSS_UP' : 'TREND_LINE_CROSS_DOWN';
+  let condition = applyCondTypeDefaults(
+    {
+      indicatorType: item.indicatorType,
+      conditionType: condType,
+      leftField: item.leftField ?? defaults.l,
+      rightField: 'NONE',
+      lookbackPeriod: Math.max(2, lookback),
+      candleRange: 1,
+      valuePeriodOverride: false,
+      thresholdOverride: false,
+      rightPeriodOverride: false,
+    },
+    condType,
+    def,
+  );
+  condition = initConditionPeriodsInherit(item.indicatorType, condition, def);
+  return { id: genId(), type: 'CONDITION', condition };
+}
+
+export function buildTrendLineConditionNodeFromDrag(data: {
+  value: string;
+  indicatorType?: string;
+  leftField?: string;
+  lookback?: number;
+}, signalType: 'buy' | 'sell', def: DefType): LogicNode | null {
+  const item = findTrendLinePaletteItem(data.value);
+  const indicatorType = item?.indicatorType ?? data.indicatorType;
+  if (!indicatorType) return null;
+  return buildTrendLineConditionNode(
+    { indicatorType, leftField: item?.leftField ?? data.leftField },
+    signalType,
+    def,
+    data.lookback ?? 10,
+  );
+}