diff --git a/frontend/src/components/tradeNotification/TradeSignalMiniChart.tsx b/frontend/src/components/tradeNotification/TradeSignalMiniChart.tsx
index 604e968..c2a9675 100644
--- a/frontend/src/components/tradeNotification/TradeSignalMiniChart.tsx
+++ b/frontend/src/components/tradeNotification/TradeSignalMiniChart.tsx
@@ -300,7 +300,6 @@ const TradeSignalMiniChart: React.FC<Props> = ({
         candleOverlayToggles={candleOverlayToggles}
         onToggleCandleOverlay={handleToggleCandleOverlay}
         crosshairInfoVisible={false}
-        resolveInitialDisplayCount={needsDeepObv ? () => 50 : undefined}
       />
       )}
     </div>
diff --git a/frontend/src/utils/ChartManager.ts b/frontend/src/utils/ChartManager.ts
index dc8fa00..b8b1e78 100644
--- a/frontend/src/utils/ChartManager.ts
+++ b/frontend/src/utils/ChartManager.ts
@@ -911,6 +911,14 @@ export class ChartManager {
           }, pane);
           series.setData(filtered.map(p => ({ time: p.time as Time, value: p.value })));
           seriesMeta.push({ plotId: plotDef.id, isHistogram: false, color: plotDef.color });
+
+          // OBV 디버그: 마지막 5개 값 출력
+          if (config.type === 'OBV') {
+            const last5 = filtered.slice(-5).map(p => p.value.toFixed(2));
+            const minV = Math.min(...filtered.map(p => p.value));
+            const maxV = Math.max(...filtered.map(p => p.value));
+            console.warn(`[OBV-DATA] ${plotDef.id} | last5=${last5.join(',')} | min=${minV.toFixed(2)} max=${maxV.toFixed(2)} | totalPts=${filtered.length}`);
+          }
         }
 
         seriesList.push(series);