diff --git a/trading_system/market_scanner.py b/trading_system/market_scanner.py
index 6ac3be3..2280dd9 100644
--- a/trading_system/market_scanner.py
+++ b/trading_system/market_scanner.py
@@ -326,7 +326,16 @@ class MarketScanner:
             logger.info(f"===== 其它活跃交易对 (高波动/无明确信号) ({len(others)}) =====")
             for i, symbol_info in enumerate(others, 1):
                 self._log_single_symbol(i, symbol_info)
-        
+
+        # 当所有标的趋势信号强度均为 0 时打一行说明，避免误以为异常
+        strong_count = sum(1 for s in top_n if s.get('signal_strength', 0) > 0)
+        if top_n and strong_count == 0:
+            logger.info(
+                "本轮扫描: 所有 %d 个标的趋势信号强度均为 0（可能原因：1h 与 4H 方向冲突被清零、或无明确 MACD 金叉/死叉、或多空冲突）。"
+                "仅当趋势信号≥5 才会生成合约推荐与自动交易。",
+                len(top_n),
+            )
+
         return top_n
 
     def _log_single_symbol(self, index: int, symbol_info: Dict):