diff --git a/backend/api/routes/recommendations.py b/backend/api/routes/recommendations.py
index 31e5a1a..bdf6257 100644
--- a/backend/api/routes/recommendations.py
+++ b/backend/api/routes/recommendations.py
@@ -273,6 +273,92 @@ async def get_recommendations(
                         # 保留推荐生成时的 current_price，但给出来源/时间（用于提示“可能过时”）
                         rec.setdefault("current_price_source", rec.get("current_price_source") or "snapshot")
                         rec.setdefault("price_updated", False)
+
+            # 4) 过滤“过期/不再适用”的推荐（短期可借鉴）
+            # 规则：
+            # - 时间过期：超过 max_age_sec 直接丢弃
+            # - 价格偏离：当前价偏离 planned_entry_price / suggested_limit_price 过大丢弃
+            # - 合法性校验：BUY 需要 SL < entry < TP；SELL 需要 SL > entry > TP
+            import time as _time
+            now_s = _time.time()
+            try:
+                max_age_sec = int(os.getenv("RECOMMENDATIONS_MAX_AGE_SEC", "1800"))  # 默认30分钟
+            except Exception:
+                max_age_sec = 1800
+            try:
+                max_price_drift_pct = float(os.getenv("RECOMMENDATIONS_MAX_PRICE_DRIFT_PCT", "1.5"))  # 默认1.5%
+            except Exception:
+                max_price_drift_pct = 1.5
+
+            dropped_age = 0
+            dropped_drift = 0
+            dropped_invalid = 0
+
+            def _f(v):
+                try:
+                    return float(v)
+                except Exception:
+                    return None
+
+            filtered_recs: List[Dict[str, Any]] = []
+            for rec in recommendations:
+                if not isinstance(rec, dict):
+                    continue
+
+                # 4.1 时间过期
+                ts = rec.get("timestamp", 0)
+                try:
+                    ts = float(ts) if ts is not None else 0.0
+                except Exception:
+                    ts = 0.0
+                if ts and max_age_sec > 0 and (now_s - ts) > max_age_sec:
+                    dropped_age += 1
+                    continue
+
+                direction_u = str(rec.get("direction", "") or "").upper()
+                cur = _f(rec.get("current_price"))
+                # 基准入场价：优先 planned_entry_price（新逻辑），再 suggested_limit_price
+                entry_base = _f(rec.get("planned_entry_price"))
+                if entry_base is None:
+                    entry_base = _f(rec.get("suggested_limit_price"))
+                if entry_base is None:
+                    entry_base = _f(rec.get("analysis_price")) or cur
+
+                # 4.2 价格偏离过大（挂单参考已失效）
+                if max_price_drift_pct > 0 and cur and entry_base and entry_base > 0:
+                    drift = abs((cur - entry_base) / entry_base) * 100
+                    if drift > max_price_drift_pct:
+                        dropped_drift += 1
+                        continue
+
+                # 4.3 合法性校验：止损/止盈相对关系
+                sl = _f(rec.get("suggested_stop_loss"))
+                tp1 = _f(rec.get("suggested_take_profit_1"))
+                tp2 = _f(rec.get("suggested_take_profit_2"))
+                if direction_u == "BUY":
+                    if entry_base and sl and sl >= entry_base:
+                        dropped_invalid += 1
+                        continue
+                    if entry_base and tp1 and tp1 <= entry_base:
+                        dropped_invalid += 1
+                        continue
+                    if entry_base and tp2 and tp2 <= entry_base:
+                        dropped_invalid += 1
+                        continue
+                elif direction_u == "SELL":
+                    if entry_base and sl and sl <= entry_base:
+                        dropped_invalid += 1
+                        continue
+                    if entry_base and tp1 and tp1 >= entry_base:
+                        dropped_invalid += 1
+                        continue
+                    if entry_base and tp2 and tp2 >= entry_base:
+                        dropped_invalid += 1
+                        continue
+
+                filtered_recs.append(rec)
+
+            recommendations = filtered_recs
             
             # 方向过滤
             if direction:
@@ -291,6 +377,13 @@ async def get_recommendations(
                     "price_source": "mark_price" if mark_items else None,
                     "price_updated_at": mark_updated_at,
                     "price_updated_at_ms": mark_updated_at_ms,
+                    "recommendations_max_age_sec": max_age_sec,
+                    "recommendations_max_price_drift_pct": max_price_drift_pct,
+                    "dropped": {
+                        "age": dropped_age,
+                        "price_drift": dropped_drift,
+                        "invalid": dropped_invalid,
+                    },
                 },
                 "data": recommendations
             }