diff --git a/frontend/app/trades/page.tsx b/frontend/app/trades/page.tsx
index 3774e8b..8a55aa6 100644
--- a/frontend/app/trades/page.tsx
+++ b/frontend/app/trades/page.tsx
@@ -73,8 +73,8 @@ function LiveTrades({ symbol }: { symbol: Symbol }) {
           const existingIds = new Set(prev.map((t: TradeRow) => t.agg_id));
           const newOnes = incoming.filter((t: TradeRow) => !existingIds.has(t.agg_id));
           if (newOnes.length === 0) return prev;
-          // 最新在顶部，最多保留50条
-          return [...newOnes, ...prev].slice(0, 50);
+          // 最新在顶部，最多保留20条
+          return [...newOnes, ...prev].slice(0, 20);
         });
         setLoading(false);
       } catch {}