diff --git a/backend/main.py b/backend/main.py
index 36f6632..7dbc0ad 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -449,7 +449,14 @@ async def get_market_indicators(user: dict = Depends(get_current_user)):
                 ind_type,
             )
             if row:
-                indicators[ind_type] = {"value": row["value"], "ts": row["timestamp_ms"]}
+                val = row["value"]
+                if isinstance(val, str):
+                    import json as _json
+                    try:
+                        val = _json.loads(val)
+                    except Exception:
+                        pass
+                indicators[ind_type] = {"value": val, "ts": row["timestamp_ms"]}
         result[sym.replace("USDT", "")] = indicators
     return result
 
diff --git a/frontend/app/signals/page.tsx b/frontend/app/signals/page.tsx
index a23e32c..52a16a3 100644
--- a/frontend/app/signals/page.tsx
+++ b/frontend/app/signals/page.tsx
@@ -115,11 +115,18 @@ function MarketIndicatorsCards({ symbol }: { symbol: Symbol }) {
 
   if (!data) return <div className="text-center text-slate-400 text-sm py-3">等待市场指标数据...</div>;
 
-  // value是JSONB对象，需要取具体字段
-  const lsVal = data.long_short_ratio?.value as Record<string, string> | undefined;
-  const topVal = data.top_trader_position?.value as Record<string, string> | undefined;
-  const oiVal = data.open_interest_hist?.value as Record<string, string> | undefined;
-  const premVal = data.coinbase_premium?.value as Record<string, unknown> | undefined;
+  // value可能是JSON字符串或对象，统一解析
+  const parseVal = (v: unknown): Record<string, unknown> => {
+    if (!v) return {};
+    if (typeof v === "string") { try { return JSON.parse(v); } catch { return {}; } }
+    if (typeof v === "object") return v as Record<string, unknown>;
+    return {};
+  };
+
+  const lsVal = parseVal(data.long_short_ratio?.value);
+  const topVal = parseVal(data.top_trader_position?.value);
+  const oiVal = parseVal(data.open_interest_hist?.value);
+  const premVal = parseVal(data.coinbase_premium?.value);
 
   const longPct = Number(lsVal?.longAccount ?? 0.5) * 100;
   const shortPct = Number(lsVal?.shortAccount ?? 0.5) * 100;