diff --git a/apps/web/src/components/TradingViewChart.tsx b/apps/web/src/components/TradingViewChart.tsx
index 948606f..6a9cd48 100644
--- a/apps/web/src/components/TradingViewChart.tsx
+++ b/apps/web/src/components/TradingViewChart.tsx
@@ -26,6 +26,8 @@ export const TradingViewChart: React.FC<TradingViewChartProps> = ({
   // 用 ref 保活最新真实价格，避免 5s 定时器闭包捕获到过期值
   const priceRef = useRef<number>(currentPrice);
   const lastTickRef = useRef<{ time: number; price: number } | null>(null);
+  // 已绘制到哪根柱（防止轮询/心跳重复写入同一根柱）
+  const lastBarTimeRef = useRef<number>(0);
   const [timeframe, setTimeframe] = useState<string>('5s');
 
   // 同步最新真实价格到 ref（同时立即打点一次，保证首根柱出现）
@@ -91,35 +93,61 @@ export const TradingViewChart: React.FC<TradingViewChartProps> = ({
     seriesRef.current = candlestickSeries;
 
     // 2. 从后端 API 异步获取真实 K 线（Indexer 聚合链上成交）
-    const loadRealKlines = async () => {
+    const fetchKlines = async (): Promise<any[] | null> => {
       try {
         const res = await fetch(
           `${API_BASE}/api/v1/charts/klines?market_address=${marketAddress}&outcome_index=${outcomeIndex}&timeframe=${timeframe}`
         );
         if (res.ok) {
           const data = await res.json();
-          if (data.bars && data.bars.length > 0) {
-            candlestickSeries.setData(data.bars);
-            chart.timeScale().fitContent();
-            const last = data.bars[data.bars.length - 1];
-            lastTickRef.current = { time: last.time, price: Number(last.close) };
-            return;
-          }
+          if (data.bars && data.bars.length > 0) return data.bars;
         }
       } catch (e) {
         console.warn('Load klines failed:', e);
       }
-      // 无历史成交：不画任何假柱，等 5s 心跳用真实边际价打点
+      return null;
+    };
+
+    const loadRealKlines = async () => {
+      const bars = await fetchKlines();
+      if (bars && bars.length > 0) {
+        candlestickSeries.setData(bars as any);
+        chart.timeScale().fitContent();
+        const last = bars[bars.length - 1];
+        lastBarTimeRef.current = last.time;
+        lastTickRef.current = { time: last.time, price: Number(last.close) };
+      }
+      // 无历史成交：不画任何假柱，等心跳用真实边际价打点
     };
 
     loadRealKlines();
 
-    // 3. 每 5 秒用最新真实边际价打点（价格未变化则不重复写入，绝不伪造曲线）
-    const interval = setInterval(() => {
+    // 3. 每 5 秒轮询后端：把 indexer 最新聚合出的成交柱增量追加/更新到图表
+    const refreshInterval = setInterval(async () => {
+      const bars = await fetchKlines();
+      if (!bars || bars.length === 0) return;
+      const series = seriesRef.current;
+      if (!series) return;
+      const lastBarTime = lastBarTimeRef.current;
+      // 仅处理「当前已绘制柱」与「其后新增柱」，避免重复写历史
+      for (const b of bars) {
+        if (b.time < lastBarTime) continue;
+        series.update({ time: b.time, open: b.open, high: b.high, low: b.low, close: b.close });
+      }
+      const newest = bars[bars.length - 1];
+      if (newest.time >= lastBarTime) {
+        lastBarTimeRef.current = newest.time;
+        lastTickRef.current = { time: newest.time, price: Number(newest.close) };
+      }
+    }, BAR_SECONDS * 1000);
+
+    // 4. 每 5 秒用最新真实边际价打点（仅在最新成交柱之后，价格未变化则不重复写入，绝不伪造曲线）
+    const heartbeatInterval = setInterval(() => {
       const p = priceRef.current;
       const series = seriesRef.current;
       if (p <= 0 || !series) return;
       const barTime = barTimeOfNow();
+      if (barTime < lastBarTimeRef.current) return;
       const last = lastTickRef.current;
       if (last && last.time === barTime && last.price === p) return;
       series.update({
@@ -129,6 +157,9 @@ export const TradingViewChart: React.FC<TradingViewChartProps> = ({
         low: p,
         close: p,
       });
+      if (barTime > lastBarTimeRef.current) {
+        lastBarTimeRef.current = barTime;
+      }
       lastTickRef.current = { time: barTime, price: p };
     }, BAR_SECONDS * 1000);
 
@@ -140,11 +171,13 @@ export const TradingViewChart: React.FC<TradingViewChartProps> = ({
     window.addEventListener('resize', handleResize);
 
     return () => {
-      clearInterval(interval);
+      clearInterval(refreshInterval);
+      clearInterval(heartbeatInterval);
       window.removeEventListener('resize', handleResize);
       chart.remove();
       chartRef.current = null;
       seriesRef.current = null;
+      lastBarTimeRef.current = 0;
     };
   }, [marketAddress, outcomeIndex, timeframe]);