diff --git a/frontend/src/components/TradingChart.tsx b/frontend/src/components/TradingChart.tsx
index cc3ccf8..92fa550 100644
--- a/frontend/src/components/TradingChart.tsx
+++ b/frontend/src/components/TradingChart.tsx
@@ -1989,7 +1989,10 @@ function barsKey(bars: OHLCVBar[], market = ''): string {
   if (bars.length === 0) return '';
   const last = bars[bars.length - 1];
   // last.close 제외 — 틱마다 full reload 방지 (실시간은 updateBar/appendBar 경로)
-  return `${market}:${bars.length}:${bars[0].time}:${last.time}`;
+  // volume 합계 — STOMP volume=0 → Upbit 폴백 후 OBV 등 지표 재계산 유도
+  const volSum = bars.reduce((s, b) => s + (Number(b.volume) || 0), 0);
+  const volFlag = volSum > 0 ? 'v' : '0';
+  return `${market}:${bars.length}:${bars[0].time}:${last.time}:${volFlag}`;
 }
 
 /**
diff --git a/frontend/src/components/tradeNotification/TradeSignalMiniChart.tsx b/frontend/src/components/tradeNotification/TradeSignalMiniChart.tsx
index c3dd670..e34431b 100644
--- a/frontend/src/components/tradeNotification/TradeSignalMiniChart.tsx
+++ b/frontend/src/components/tradeNotification/TradeSignalMiniChart.tsx
@@ -54,7 +54,7 @@ const TradeSignalMiniChart: React.FC<Props> = ({
 }) => {
   const { getParams, getVisualConfig } = useIndicatorSettings();
   const { defaults: appDefaults } = useAppSettings();
-  const chartRealtimeSource = (appDefaults.chartRealtimeSource ?? 'BACKEND_STOMP') as ChartRealtimeSource;
+  const appChartSource = (appDefaults.chartRealtimeSource ?? 'BACKEND_STOMP') as ChartRealtimeSource;
   const managerRef = useRef<ChartManager | null>(null);
   const canvasWrapRef = useRef<HTMLDivElement | null>(null);
   const [chartReloadTick, setChartReloadTick] = useState(0);
@@ -77,6 +77,9 @@ const TradeSignalMiniChart: React.FC<Props> = ({
     [baseIndicators],
   );
 
+  /** OBV 누적값 — Upbit REST 직접 (STOMP 백엔드 volume=0 이면 본선 미표시) */
+  const chartRealtimeSource: ChartRealtimeSource = needsDeepObv ? 'UPBIT_DIRECT' : appChartSource;
+
   const {
     indicators: chartIndicators,
     candleOverlayToggles,
@@ -166,6 +169,14 @@ const TradeSignalMiniChart: React.FC<Props> = ({
   barsMarketRef.current = barsMarket;
   const barsReady = bars.length >= 2 && barsMarket === market;
 
+  const obvBarsReady = useMemo(() => {
+    if (!needsDeepObv) return true;
+    if (bars.length < 2) return false;
+    return bars.some(b => (Number(b.volume) || 0) > 0);
+  }, [needsDeepObv, bars]);
+
+  const chartDataReady = barsReady && obvBarsReady;
+
   useLayoutEffect(() => {
     chartLiveReadyRef.current = false;
     pendingBarRef.current = null;
@@ -191,7 +202,7 @@ const TradeSignalMiniChart: React.FC<Props> = ({
         if (!canvasWrapRef.current) return;
         if (managerRef.current?.hasMainSeries()) {
           syncChartLayout();
-        } else if (!chartReloadTriggeredRef.current && delay >= 600 && barsReady) {
+        } else if (!chartReloadTriggeredRef.current && delay >= 600 && chartDataReady) {
           chartReloadTriggeredRef.current = true;
           setChartReloadTick(t => t + 1);
         }
@@ -204,15 +215,15 @@ const TradeSignalMiniChart: React.FC<Props> = ({
       timers.forEach(clearTimeout);
       ro.disconnect();
     };
-  }, [market, timeframe, enabled, barsReady, syncChartLayout, fillHeight]);
+  }, [market, timeframe, enabled, chartDataReady, syncChartLayout, fillHeight]);
 
   useEffect(() => {
-    if (!enabled || !barsReady) return;
+    if (!enabled || !chartDataReady) return;
     if (!managerRef.current?.hasMainSeries() && !chartReloadTriggeredRef.current) {
       chartReloadTriggeredRef.current = true;
       setChartReloadTick(t => t + 1);
     }
-  }, [enabled, barsReady]);
+  }, [enabled, chartDataReady]);
 
   useEffect(() => {
     if (!enabled) return;
@@ -246,13 +257,17 @@ const TradeSignalMiniChart: React.FC<Props> = ({
       ].filter(Boolean).join(' ')}
     >
       {isLoading && <div className="tnl-mini-chart-loading">로딩…</div>}
+      {needsDeepObv && !isLoading && !obvBarsReady && (
+        <div className="tnl-mini-chart-loading">OBV 거래량 데이터 로딩…</div>
+      )}
       {isLoadingMore && (
         <div className="chart-history-loading">
           <div className="loading-spinner" style={{ width: 12, height: 12 }} />
         </div>
       )}
+      {chartDataReady && (
       <TradingChart
-        key={`${market}-${timeframe}-${chartReloadTick}-${chartIndicators.map(i => i.id).join(',')}`}
+        key={`${market}-${timeframe}-${chartReloadTick}-${chartRealtimeSource}-${needsDeepObv ? 'obv' : 'std'}-${chartIndicators.map(i => i.id).join(',')}`}
         chartVisible
         bars={bars}
         barsMarket={barsMarket}
@@ -283,6 +298,7 @@ const TradeSignalMiniChart: React.FC<Props> = ({
         onToggleCandleOverlay={handleToggleCandleOverlay}
         crosshairInfoVisible={false}
       />
+      )}
     </div>
   );
 };
diff --git a/frontend/src/hooks/useStompChartData.ts b/frontend/src/hooks/useStompChartData.ts
index 2cf73e1..245b86a 100644
--- a/frontend/src/hooks/useStompChartData.ts
+++ b/frontend/src/hooks/useStompChartData.ts
@@ -15,6 +15,10 @@ import { fetchUpbitCandlesCached } from '../utils/requestCache';
 /** 초기 렌더 최소 봉 수 — 미만이면 업비트 REST 폴백 */
 const MIN_INITIAL_BARS = Math.min(50, Math.floor(DISPLAY_COUNT / 4));
 
+function barsHaveVolume(bars: OHLCVBar[]): boolean {
+  return bars.some(b => (Number(b.volume) || 0) > 0);
+}
+
 /** 백엔드 BarBuilder 는 틱마다 1m 만 STOMP 발행 — 차트 분봉은 클라이언트에서 집계 */
 const STOMP_TICK_CANDLE_TYPE = '1m';
 
@@ -106,29 +110,45 @@ async function fetchInitialBarsWithRetry(
   throw lastErr ?? new Error('history fetch failed');
 }
 
-/** 백엔드 history → 부족·실패 시 업비트 REST 폴백 (종목별 Ta4j 미적재 대응) */
+/** 백엔드 history → 부족·거래량 0·실패 시 업비트 REST 폴백 */
 async function loadInitialBars(
   market: string,
   timeframe: Timeframe,
   count: number,
   marketChanged: boolean,
+  preferUpbit = false,
 ): Promise<OHLCVBar[]> {
   const candleType = timeframeToCandleType(timeframe);
+  const upbitCount = Math.min(count, OBV_DEEP_HISTORY);
+
+  if (preferUpbit) {
+    try {
+      const upbit = await fetchUpbitCandlesCached(market, timeframe, upbitCount, marketChanged);
+      if (upbit.length >= MIN_INITIAL_BARS && barsHaveVolume(upbit)) return upbit;
+    } catch {
+      /* Upbit 실패 시 backend 시도 */
+    }
+  }
+
   let bars: OHLCVBar[] = [];
   try {
     bars = await fetchInitialBarsWithRetry(market, candleType, count);
   } catch {
     bars = [];
   }
-  if (bars.length < MIN_INITIAL_BARS) {
+
+  const needsUpbitFallback = bars.length < MIN_INITIAL_BARS || !barsHaveVolume(bars);
+  if (needsUpbitFallback) {
     try {
       const fallback = await fetchUpbitCandlesCached(
         market,
         timeframe,
-        Math.min(count, 200),
+        upbitCount,
         marketChanged,
       );
-      if (fallback.length > bars.length) bars = fallback;
+      if (fallback.length > bars.length || (barsHaveVolume(fallback) && !barsHaveVolume(bars))) {
+        bars = fallback;
+      }
     } catch {
       /* 폴백 실패 시 backend 결과 유지 */
     }
@@ -182,7 +202,7 @@ export function useStompChartData(
     const count = opts.deepObvHistory
       ? OBV_DEEP_HISTORY
       : DISPLAY_COUNT + WARMUP_COUNT;
-    loadInitialBars(market, timeframe, count, marketChanged)
+    loadInitialBars(market, timeframe, count, marketChanged, opts.deepObvHistory === true)
       .then(newBars => {
         if (cancelled) return;
         barsRef.current = newBars;
diff --git a/frontend/src/utils/indicatorRegistry.ts b/frontend/src/utils/indicatorRegistry.ts
index 89f3f9b..e80bb56 100644
--- a/frontend/src/utils/indicatorRegistry.ts
+++ b/frontend/src/utils/indicatorRegistry.ts
@@ -472,7 +472,13 @@ function normalizeSignalLineIndicatorPlots(
   if (type === 'OBV') {
     const nextPlots = merged.map(p => {
       const reg = registryPlots.find(r => r.id === p.id);
-      return reg ? normalizeDualLinePlotDef(p, reg) : p;
+      if (!reg) return p;
+      const normalized = normalizeDualLinePlotDef(p, reg);
+      // OBV 본선 — DB 저장색(투명·신호선과 동일) 무시, registry 기본색 유지
+      if (p.id === 'plot0') {
+        return { ...normalized, color: reg.color };
+      }
+      return normalized;
     });
     return {
       plots: nextPlots,