diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 6d0c9ad..690b748 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -650,6 +650,9 @@ function App() {
     signals:   BacktestSignal[];
     showPrice: boolean;
   } | null>(null);
+  /** applyBacktestMarkersWhenReady rAF 재시도 시 최신 차트 종목·타임프레임 검증용 */
+  const chartContextRef = useRef({ symbol, timeframe });
+  chartContextRef.current = { symbol, timeframe };
 
   const syncBacktestMarkersRef = useRef<() => void>(() => {});
 
@@ -658,17 +661,23 @@ function App() {
     payload: NonNullable<typeof btMarkerPayloadRef.current>,
     attempt = 0,
   ) => {
+    btMarkerPayloadRef.current = payload;
+    const { symbol: curSym, timeframe: curTf } = chartContextRef.current;
+    if (payload.symbol !== curSym || payload.timeframe !== curTf) return;
+
     const mgr = managerRef.current;
     if (!mgr || !mgr.hasMainSeries()) {
-      if (attempt < 30) {
+      if (attempt < 120) {
         requestAnimationFrame(() => applyBacktestMarkersWhenReady(payload, attempt + 1));
       }
       return;
     }
-    btMarkerPayloadRef.current = payload;
+    if (payload.symbol !== chartContextRef.current.symbol
+        || payload.timeframe !== chartContextRef.current.timeframe) return;
     mgr.setBacktestMarkers(payload.signals, payload.showPrice);
   }, []);
 
+  /** reloadAll 직후 등 — payload 가 있을 때만 재적용 (없을 때 clear 하지 않음, 경쟁 방지) */
   const syncBacktestMarkers = useCallback(() => {
     const payload = btMarkerPayloadRef.current;
     if (
@@ -678,9 +687,7 @@ function App() {
       payload.signals.length > 0
     ) {
       applyBacktestMarkersWhenReady(payload);
-      return;
     }
-    managerRef.current?.clearBacktestMarkers();
   }, [symbol, timeframe, applyBacktestMarkersWhenReady]);
 
   syncBacktestMarkersRef.current = syncBacktestMarkers;
@@ -897,16 +904,18 @@ function App() {
   // 백테스팅 시그널 → ref 갱신 후 ChartManager 마커 동기화
   useEffect(() => {
     if (btMatchesChart && btSignals.length > 0) {
-      btMarkerPayloadRef.current = {
+      const payload = {
         symbol,
         timeframe,
         signals:   btSignals,
         showPrice: appDefaults.btShowPrice,
       };
+      btMarkerPayloadRef.current = payload;
+      applyBacktestMarkersWhenReady(payload);
     } else {
       btMarkerPayloadRef.current = null;
+      managerRef.current?.clearBacktestMarkers();
     }
-    syncBacktestMarkers();
     let innerRaf = 0;
     const outerRaf = requestAnimationFrame(() => {
       innerRaf = requestAnimationFrame(syncBacktestMarkers);
@@ -915,7 +924,7 @@ function App() {
       cancelAnimationFrame(outerRaf);
       if (innerRaf) cancelAnimationFrame(innerRaf);
     };
-  }, [btMatchesChart, btSignals, btRunSeq, symbol, timeframe, appDefaults.btShowPrice, syncBacktestMarkers]);
+  }, [btMatchesChart, btSignals, btRunSeq, symbol, timeframe, appDefaults.btShowPrice, applyBacktestMarkersWhenReady, syncBacktestMarkers]);
 
   // ── 시뮬레이션 데이터 (Upbit 아닐 때) ──────────────────────────────────
   const [simBars, setSimBars] = useState<OHLCVBar[]>(() =>
@@ -1716,12 +1725,14 @@ function App() {
                 r.signals.length > 0
               ) {
                 const showPrice = appDefaults.btShowPrice;
-                applyBacktestMarkersWhenReady({
+                const payload = {
                   symbol:    runSymbol,
                   timeframe: runTf,
                   signals:   r.signals,
                   showPrice,
-                });
+                };
+                btMarkerPayloadRef.current = payload;
+                applyBacktestMarkersWhenReady(payload);
               }
               if (appDefaults.btAutoPopup) setShowBtResult(true);
             }
@@ -1729,7 +1740,11 @@ function App() {
         onOpenBtSettings={() => setShowBtSettings(true)}
         onOpenBtResults={() => setShowBtResult(true)}
         hasBtResult={btMatchesChart}
-        onClearBtMarkers={() => { btClear(); managerRef.current?.clearBacktestMarkers(); }}
+        onClearBtMarkers={() => {
+          btMarkerPayloadRef.current = null;
+          btClear();
+          managerRef.current?.clearBacktestMarkers();
+        }}
         onToggleLiveStrategy={() => setShowLivePanel(v => !v)}
         liveStrategyActive={showLivePanel || monitoredMarkets.length > 0}
       />
@@ -2003,7 +2018,11 @@ function App() {
             <BacktestPanel
               stats={btStats}
               signalCount={btSignals.length}
-              onClear={() => { btClear(); managerRef.current?.clearBacktestMarkers(); }}
+              onClear={() => {
+                btMarkerPayloadRef.current = null;
+                btClear();
+                managerRef.current?.clearBacktestMarkers();
+              }}
             />
           )}
 
diff --git a/frontend/src/components/TradingChart.tsx b/frontend/src/components/TradingChart.tsx
index a6b266d..713207b 100644
--- a/frontend/src/components/TradingChart.tsx
+++ b/frontend/src/components/TradingChart.tsx
@@ -306,6 +306,7 @@ const TradingChart: React.FC<TradingChartProps> = ({
         m.resetPaneHeights(w.clientHeight);
         const fb = m.hasIchimoku() ? 28 : 0;
         m.setInitialVisibleRange(DISPLAY_COUNT, fb);
+        if (delay === 1400) onDataLoaded?.();
       }, delay)
     );
   }, [applyPaneLayout, onDataLoaded, displayTimezone, timeframe, market]);