diff --git a/frontend/app/trades/page.tsx b/frontend/app/trades/page.tsx
index 702d5b4..59bed67 100644
--- a/frontend/app/trades/page.tsx
+++ b/frontend/app/trades/page.tsx
@@ -238,7 +238,7 @@ function FlowAnalysis({ symbol }: { symbol: Symbol }) {
                 <XAxis dataKey="time" tick={{ fill: "#94a3b8", fontSize: 10 }} tickLine={false} interval="preserveStartEnd" />
                 <YAxis tick={{ fill: "#94a3b8", fontSize: 10 }} tickLine={false} axisLine={false} width={50} />
                 <Tooltip
-                  formatter={(v: number) => [v.toFixed(2), "Delta"]}
+                  formatter={(v: number) => [`${v.toFixed(2)}`, "Delta"]}
                   contentStyle={{ background: "#fff", border: "1px solid #e2e8f0", borderRadius: 8, fontSize: 11 }}
                 />
                 <ReferenceLine y={0} stroke="#94a3b8" strokeDasharray="4 2" />
@@ -259,7 +259,7 @@ function FlowAnalysis({ symbol }: { symbol: Symbol }) {
                 <XAxis dataKey="time" tick={{ fill: "#94a3b8", fontSize: 10 }} tickLine={false} interval="preserveStartEnd" />
                 <YAxis tick={{ fill: "#94a3b8", fontSize: 10 }} tickLine={false} axisLine={false} width={50} />
                 <Tooltip
-                  formatter={(v: number, name: string) => [v.toFixed(2), name === "buy" ? "主动买" : "主动卖"]}
+                  formatter={(v: number, name: string) => [`${v.toFixed(2)}`, name === "buy" ? "主动买" : "主动卖"]}
                   contentStyle={{ background: "#fff", border: "1px solid #e2e8f0", borderRadius: 8, fontSize: 11 }}
                 />
                 <Area type="monotone" dataKey="buy" stroke="#16a34a" fill="#f0fdf4" strokeWidth={1.5} dot={false} connectNulls />