추세선 전략추가

2026-06-25 02:45:39 +09:00
parent ee8cd50781
commit f9447ea52f
31 changed files with 1793 additions and 49 deletions
@@ -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;
+    }
+}