diff --git a/frontend/app/trades/page.tsx b/frontend/app/trades/page.tsx
index 85e84b6..da4be42 100644
--- a/frontend/app/trades/page.tsx
+++ b/frontend/app/trades/page.tsx
@@ -184,6 +184,14 @@ function FlowAnalysis({ symbol }: { symbol: Symbol }) {
   const totalDelta = totalBuy - totalSell;
   const buyPct = totalBuy + totalSell > 0 ? (totalBuy / (totalBuy + totalSell) * 100) : 50;
 
+  // 价格轴范围：只显示实际波动区间（±0.3%缓冲）
+  const prices = chartData.map(d => d.vwap).filter(v => v > 0);
+  const priceMin = prices.length > 0 ? Math.min(...prices) : 0;
+  const priceMax = prices.length > 0 ? Math.max(...prices) : 0;
+  const pricePad = (priceMax - priceMin) * 0.3 || priceMax * 0.001;
+  const priceYMin = Math.floor(priceMin - pricePad);
+  const priceYMax = Math.ceil(priceMax + pricePad);
+
   return (
     <div className="rounded-xl border border-slate-200 bg-white shadow-sm overflow-hidden">
       <div className="px-4 py-3 border-b border-slate-100">
@@ -262,8 +270,9 @@ function FlowAnalysis({ symbol }: { symbol: Symbol }) {
                 <XAxis dataKey="time" tick={{ fill: "#94a3b8", fontSize: 10 }} tickLine={false} interval="preserveStartEnd" />
                 {/* 左轴：Delta */}
                 <YAxis yAxisId="delta" tick={{ fill: "#94a3b8", fontSize: 10 }} tickLine={false} axisLine={false} width={55} />
-                {/* 右轴：价格 */}
+                {/* 右轴：价格，自适应波动范围 */}
                 <YAxis yAxisId="price" orientation="right" tick={{ fill: "#f59e0b", fontSize: 10 }} tickLine={false} axisLine={false} width={65}
+                  domain={[priceYMin, priceYMax]}
                   tickFormatter={(v: number) => v >= 1000 ? `$${(v/1000).toFixed(1)}k` : `$${v.toFixed(0)}`}
                 />
                 <Tooltip