가상투자 화면 목록 선택 동작

frontend/src/utils/virtualSignalMetrics.ts

@@ -143,6 +143,29 @@ export function getTrafficLightState(matchRate: number, metrics: ConditionMetric
   return 'red';
 }
 
+/** 매수·매도 조건 충족률 기준 타이밍 (TradeAlertModal: 매수=블루, 매도=레드) */
+export type VirtualTradeTiming = 'buy' | 'sell' | 'neutral';
+
+function sideMatchRate(metrics: ConditionMetric[], side: 'buy' | 'sell'): number {
+  const rows = metrics.filter(m => m.row.side === side && m.status !== 'unknown');
+  if (rows.length === 0) return 0;
+  const met = rows.filter(m => m.status === 'match').length;
+  return Math.round((met / rows.length) * 100);
+}
+
+export function resolveVirtualTradeTiming(metrics: ConditionMetric[]): VirtualTradeTiming {
+  const buyRate = sideMatchRate(metrics, 'buy');
+  const sellRate = sideMatchRate(metrics, 'sell');
+  if (buyRate === 0 && sellRate === 0) return 'neutral';
+  if (buyRate >= 100 && buyRate > sellRate) return 'buy';
+  if (sellRate >= 100 && sellRate > buyRate) return 'sell';
+  if (buyRate >= 100 && sellRate < 100) return 'buy';
+  if (sellRate >= 100 && buyRate < 100) return 'sell';
+  if (buyRate > sellRate && buyRate >= 50) return 'buy';
+  if (sellRate > buyRate && sellRate >= 50) return 'sell';
+  return 'neutral';
+}
+
 export function formatUpdatedTime(ts: number | undefined): string {
   if (!ts) return '—';
   return new Date(ts).toLocaleTimeString('ko-KR', {