fixed porfolio value

apps/stock/orchestrator/src/backtest/BacktestEngine.ts

@@ -668,10 +668,17 @@ export class BacktestEngine extends EventEmitter {
   private async updateEquityCurve(): Promise<void> {
     const totalEquity = await this.getPortfolioValue();
     
-    this.equityCurve.push({
-      timestamp: this.currentTime,
-      value: totalEquity
-    });
+    // Don't add duplicate points at the same timestamp
+    const lastPoint = this.equityCurve[this.equityCurve.length - 1];
+    if (lastPoint && lastPoint.timestamp === this.currentTime) {
+      // Update the value instead of adding a duplicate
+      lastPoint.value = totalEquity;
+    } else {
+      this.equityCurve.push({
+        timestamp: this.currentTime,
+        value: totalEquity
+      });
+    }
   }
   
   private async getPortfolioValue(): Promise<number> {
@@ -680,9 +687,23 @@ export class BacktestEngine extends EventEmitter {
       return this.initialCapital;
     }
     
-    // Get current P&L
-    const [realized, unrealized] = tradingEngine.getTotalPnl();
-    return this.initialCapital + realized + unrealized;
+    try {
+      // Get current P&L
+      const [realized, unrealized] = tradingEngine.getTotalPnl();
+      const totalValue = this.initialCapital + realized + unrealized;
+      
+      // Ensure we never return 0 or negative values that would cause spikes
+      // This handles the case where getTotalPnl might not be initialized yet
+      if (totalValue <= 0 || isNaN(totalValue)) {
+        return this.initialCapital;
+      }
+      
+      return totalValue;
+    } catch (error) {
+      // If getTotalPnl fails, return initial capital
+      this.container.logger.warn('Failed to get total P&L, using initial capital:', error);
+      return this.initialCapital;
+    }
   }
 
   private calculatePerformance(closedTrades: any[] = []): PerformanceMetrics {