fix: OI Top API response parsing and quant data URL validation

- Fix OITopAPIResponse struct to use Code int (0=success) instead of Success bool
- Add all response fields from actual API (time_range_param, rank_type, limit)
- Add {symbol} placeholder validation warning in FetchQuantData
- Add API-level validation in strategy create/update to warn about missing {symbol}

api/strategy.go

@@ -8,12 +8,27 @@ import (
 	"nofx/market"
 	"nofx/mcp"
 	"nofx/store"
+	"strings"
 	"time"
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
 )
 
+// validateStrategyConfig validates strategy configuration and returns warnings
+func validateStrategyConfig(config *store.StrategyConfig) []string {
+	var warnings []string
+
+	// Validate quant data URL if enabled
+	if config.Indicators.EnableQuantData && config.Indicators.QuantDataAPIURL != "" {
+		if !strings.Contains(config.Indicators.QuantDataAPIURL, "{symbol}") {
+			warnings = append(warnings, "Quant data URL does not contain {symbol} placeholder. The same data will be used for all coins, which may not be correct.")
+		}
+	}
+
+	return warnings
+}
+
 // handleGetStrategies Get strategy list
 func (s *Server) handleGetStrategies(c *gin.Context) {
 	userID := c.GetString("user_id")
@@ -123,10 +138,18 @@ func (s *Server) handleCreateStrategy(c *gin.Context) {
 		return
 	}
 
-	c.JSON(http.StatusOK, gin.H{
+	// Validate configuration and collect warnings
+	warnings := validateStrategyConfig(&req.Config)
+
+	response := gin.H{
 		"id":      strategy.ID,
 		"message": "Strategy created successfully",
-	})
+	}
+	if len(warnings) > 0 {
+		response["warnings"] = warnings
+	}
+
+	c.JSON(http.StatusOK, response)
 }
 
 // handleUpdateStrategy Update strategy
@@ -181,7 +204,15 @@ func (s *Server) handleUpdateStrategy(c *gin.Context) {
 		return
 	}
 
-	c.JSON(http.StatusOK, gin.H{"message": "Strategy updated successfully"})
+	// Validate configuration and collect warnings
+	warnings := validateStrategyConfig(&req.Config)
+
+	response := gin.H{"message": "Strategy updated successfully"}
+	if len(warnings) > 0 {
+		response["warnings"] = warnings
+	}
+
+	c.JSON(http.StatusOK, response)
 }
 
 // handleDeleteStrategy Delete strategy

decision/strategy_engine.go

@@ -215,8 +215,14 @@ func (e *StrategyEngine) FetchQuantData(symbol string) (*QuantData, error) {
 		return nil, nil
 	}
 
+	// Check if URL contains {symbol} placeholder
+	apiURL := e.config.Indicators.QuantDataAPIURL
+	if !strings.Contains(apiURL, "{symbol}") {
+		logger.Infof("⚠️  Quant data URL does not contain {symbol} placeholder, data may be incorrect for %s", symbol)
+	}
+
 	// Replace {symbol} placeholder
-	url := strings.Replace(e.config.Indicators.QuantDataAPIURL, "{symbol}", symbol, -1)
+	url := strings.Replace(apiURL, "{symbol}", symbol, -1)
 
 	client := &http.Client{Timeout: 10 * time.Second}
 	resp, err := client.Get(url)

pool/coin_pool.go

@@ -392,12 +392,15 @@ type OIPosition struct {
 
 // OITopAPIResponse data structure returned by OI Top API
 type OITopAPIResponse struct {
-	Success bool `json:"success"`
-	Data    struct {
-		Positions []OIPosition `json:"positions"`
-		Count     int          `json:"count"`
-		Exchange  string       `json:"exchange"`
-		TimeRange string       `json:"time_range"`
+	Code int `json:"code"` // 0 = success
+	Data struct {
+		Positions      []OIPosition `json:"positions"`
+		Count          int          `json:"count"`
+		Exchange       string       `json:"exchange"`
+		TimeRange      string       `json:"time_range"`
+		TimeRangeParam string       `json:"time_range_param"`
+		RankType       string       `json:"rank_type"`
+		Limit          int          `json:"limit"`
 	} `json:"data"`
 }
 
@@ -494,16 +497,16 @@ func fetchOITop() ([]OIPosition, error) {
 		return nil, fmt.Errorf("OI Top JSON parsing failed: %w", err)
 	}
 
-	if !response.Success {
-		return nil, fmt.Errorf("OI Top API returned failure status")
+	if response.Code != 0 {
+		return nil, fmt.Errorf("OI Top API returned error code: %d", response.Code)
 	}
 
 	if len(response.Data.Positions) == 0 {
 		return nil, fmt.Errorf("OI Top position list is empty")
 	}
 
-	log.Printf("✓ Successfully fetched %d OI Top coins (time range: %s)",
-		len(response.Data.Positions), response.Data.TimeRange)
+	log.Printf("✓ Successfully fetched %d OI Top coins (time range: %s, type: %s)",
+		len(response.Data.Positions), response.Data.TimeRange, response.Data.RankType)
 	return response.Data.Positions, nil
 }