diff --git a/decision/engine.go b/decision/engine.go
index bab18fb9..3d96bc50 100644
--- a/decision/engine.go
+++ b/decision/engine.go
@@ -137,6 +137,7 @@ type FullDecision struct {
 	UserPrompt   string     `json:"user_prompt"`   // Input prompt sent to AI
 	CoTTrace     string     `json:"cot_trace"`     // Chain of thought analysis (AI output)
 	Decisions    []Decision `json:"decisions"`     // Specific decision list
+	RawResponse  string     `json:"raw_response"`  // Raw AI response (for debugging when parsing fails)
 	Timestamp    time.Time  `json:"timestamp"`
 	// AIRequestDurationMs records AI API call duration (milliseconds) for troubleshooting latency issues
 	AIRequestDurationMs int64 `json:"ai_request_duration_ms,omitempty"`
@@ -212,6 +213,7 @@ func GetFullDecisionWithStrategy(ctx *Context, mcpClient mcp.AIClient, engine *S
 		decision.SystemPrompt = systemPrompt
 		decision.UserPrompt = userPrompt
 		decision.AIRequestDurationMs = aiCallDuration.Milliseconds()
+		decision.RawResponse = aiResponse // Save raw response for debugging
 	}
 
 	if err != nil {
@@ -350,15 +352,13 @@ func GetFullDecisionWithCustomPrompt(ctx *Context, mcpClient mcp.AIClient, custo
 		decision.SystemPrompt = systemPrompt // Save system prompt
 		decision.UserPrompt = userPrompt     // Save input prompt
 		decision.AIRequestDurationMs = aiCallDuration.Milliseconds()
+		decision.RawResponse = aiResponse // Save raw response for debugging
 	}
 
 	if err != nil {
 		return decision, fmt.Errorf("failed to parse AI response: %w", err)
 	}
 
-	decision.Timestamp = time.Now()
-	decision.SystemPrompt = systemPrompt // Save system prompt
-	decision.UserPrompt = userPrompt     // Save input prompt
 	return decision, nil
 }
 
@@ -581,7 +581,8 @@ func buildSystemPrompt(accountEquity float64, btcEthLeverage, altcoinLeverage in
 	sb.WriteString("## Field Descriptions\n\n")
 	sb.WriteString("- `action`: open_long | open_short | close_long | close_short | hold | wait\n")
 	sb.WriteString("- `confidence`: 0-100 (opening recommended ≥75)\n")
-	sb.WriteString("- Required for opening: leverage, position_size_usd, stop_loss, take_profit, confidence, risk_usd\n\n")
+	sb.WriteString("- Required for opening: leverage, position_size_usd, stop_loss, take_profit, confidence, risk_usd\n")
+	sb.WriteString("- **IMPORTANT**: All numeric values must be calculated numbers, NOT formulas/expressions (e.g., use `27.76` not `3000 * 0.01`)\n\n")
 
 	return sb.String()
 }
diff --git a/decision/strategy_engine.go b/decision/strategy_engine.go
index be986eca..eb7f2cef 100644
--- a/decision/strategy_engine.go
+++ b/decision/strategy_engine.go
@@ -839,7 +839,8 @@ func (e *StrategyEngine) BuildSystemPrompt(accountEquity float64, variant string
 	sb.WriteString("## Field Description\n\n")
 	sb.WriteString("- `action`: open_long | open_short | close_long | close_short | hold | wait\n")
 	sb.WriteString(fmt.Sprintf("- `confidence`: 0-100 (opening recommended ≥ %d)\n", riskControl.MinConfidence))
-	sb.WriteString("- Required when opening: leverage, position_size_usd, stop_loss, take_profit, confidence, risk_usd\n\n")
+	sb.WriteString("- Required when opening: leverage, position_size_usd, stop_loss, take_profit, confidence, risk_usd\n")
+	sb.WriteString("- **IMPORTANT**: All numeric values must be calculated numbers, NOT formulas/expressions (e.g., use `27.76` not `3000 * 0.01`)\n\n")
 
 	// 8. Custom Prompt
 	if e.config.CustomPrompt != "" {
diff --git a/store/decision.go b/store/decision.go
index 6641f9dd..be62bc79 100644
--- a/store/decision.go
+++ b/store/decision.go
@@ -22,6 +22,7 @@ type DecisionRecord struct {
 	InputPrompt         string             `json:"input_prompt"`
 	CoTTrace            string             `json:"cot_trace"`
 	DecisionJSON        string             `json:"decision_json"`
+	RawResponse         string             `json:"raw_response"` // Raw AI response for debugging
 	CandidateCoins      []string           `json:"candidate_coins"`
 	ExecutionLog        []string           `json:"execution_log"`
 	Success             bool               `json:"success"`
@@ -90,6 +91,7 @@ func (s *DecisionStore) initTables() error {
 			input_prompt TEXT DEFAULT '',
 			cot_trace TEXT DEFAULT '',
 			decision_json TEXT DEFAULT '',
+			raw_response TEXT DEFAULT '',
 			candidate_coins TEXT DEFAULT '',
 			execution_log TEXT DEFAULT '',
 			success BOOLEAN DEFAULT 0,
@@ -108,6 +110,9 @@ func (s *DecisionStore) initTables() error {
 		}
 	}
 
+	// Migration: add raw_response column if not exists
+	s.db.Exec(`ALTER TABLE decision_records ADD COLUMN raw_response TEXT DEFAULT ''`)
+
 	return nil
 }
 
@@ -127,13 +132,13 @@ func (s *DecisionStore) LogDecision(record *DecisionRecord) error {
 	result, err := s.db.Exec(`
 		INSERT INTO decision_records (
 			trader_id, cycle_number, timestamp, system_prompt, input_prompt,
-			cot_trace, decision_json, candidate_coins, execution_log,
+			cot_trace, decision_json, raw_response, candidate_coins, execution_log,
 			success, error_message, ai_request_duration_ms
-		) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+		) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
 	`,
 		record.TraderID, record.CycleNumber, record.Timestamp.Format(time.RFC3339),
 		record.SystemPrompt, record.InputPrompt, record.CoTTrace, record.DecisionJSON,
-		string(candidateCoinsJSON), string(executionLogJSON),
+		record.RawResponse, string(candidateCoinsJSON), string(executionLogJSON),
 		record.Success, record.ErrorMessage, record.AIRequestDurationMs,
 	)
 	if err != nil {
diff --git a/trader/auto_trader.go b/trader/auto_trader.go
index 087f2bf2..a0cddaf7 100644
--- a/trader/auto_trader.go
+++ b/trader/auto_trader.go
@@ -402,6 +402,7 @@ func (at *AutoTrader) runCycle() error {
 		record.SystemPrompt = aiDecision.SystemPrompt // Save system prompt
 		record.InputPrompt = aiDecision.UserPrompt
 		record.CoTTrace = aiDecision.CoTTrace
+		record.RawResponse = aiDecision.RawResponse // Save raw AI response for debugging
 		if len(aiDecision.Decisions) > 0 {
 			decisionJSON, _ := json.MarshalIndent(aiDecision.Decisions, "", "  ")
 			record.DecisionJSON = string(decisionJSON)