투자분석 레포트 로직 수정

frontend/src/utils/backendApi.ts

@@ -1141,6 +1141,8 @@ export interface BacktestSignal {
   type:     'BUY' | 'SELL' | 'SHORT_ENTRY' | 'SHORT_EXIT' | 'PARTIAL_SELL';
   price:    number;
   barIndex: number;
+  /** 체결 수량 (코인/주식 단위) */
+  quantity?: number;
 }
 
 export interface BacktestStats {

frontend/src/utils/backtestEquity.ts

@@ -61,8 +61,9 @@ export function buildEquityFromSignals(
   pushCurve(sorted[0].time, sorted[0].price);
 
   for (const s of sorted) {
+    const qtyHint = s.quantity != null && s.quantity > 0 ? s.quantity : undefined;
     if (BUY_TYPES.has(s.type) && qty === 0 && cash > 0) {
-      qty = cash / s.price;
+      qty = qtyHint ?? cash / s.price;
       entryPrice = s.price;
       cash = 0;
       tradeId += 1;
@@ -78,8 +79,9 @@ export function buildEquityFromSignals(
       markers.push({ time: s.time, equity: eq, type: 'buy', price: s.price });
       pushCurve(s.time, s.price);
     } else if (SELL_TYPES.has(s.type) && qty > 0) {
+      const sellQty = qtyHint ?? qty;
       const pnlPct = entryPrice > 0 ? (s.price - entryPrice) / entryPrice : 0;
-      cash = qty * s.price;
+      cash = sellQty * s.price;
       tradeId += 1;
       trades.push({
         id: tradeId,
@@ -87,7 +89,7 @@ export function buildEquityFromSignals(
         symbol,
         side: 'sell',
         price: s.price,
-        quantity: qty,
+        quantity: sellQty,
         pnlPct,
       });
       markers.push({ time: s.time, equity: cash, type: 'sell', price: s.price, pnlPct });