obv 그래프 오류

frontend/src/hooks/useStompChartData.ts

@@ -15,6 +15,10 @@ import { fetchUpbitCandlesCached } from '../utils/requestCache';
 /** 초기 렌더 최소 봉 수 — 미만이면 업비트 REST 폴백 */
 const MIN_INITIAL_BARS = Math.min(50, Math.floor(DISPLAY_COUNT / 4));
 
+function barsHaveVolume(bars: OHLCVBar[]): boolean {
+  return bars.some(b => (Number(b.volume) || 0) > 0);
+}
+
 /** 백엔드 BarBuilder 는 틱마다 1m 만 STOMP 발행 — 차트 분봉은 클라이언트에서 집계 */
 const STOMP_TICK_CANDLE_TYPE = '1m';
 
@@ -106,29 +110,45 @@ async function fetchInitialBarsWithRetry(
   throw lastErr ?? new Error('history fetch failed');
 }
 
-/** 백엔드 history → 부족·실패 시 업비트 REST 폴백 (종목별 Ta4j 미적재 대응) */
+/** 백엔드 history → 부족·거래량 0·실패 시 업비트 REST 폴백 */
 async function loadInitialBars(
   market: string,
   timeframe: Timeframe,
   count: number,
   marketChanged: boolean,
+  preferUpbit = false,
 ): Promise<OHLCVBar[]> {
   const candleType = timeframeToCandleType(timeframe);
+  const upbitCount = Math.min(count, OBV_DEEP_HISTORY);
+
+  if (preferUpbit) {
+    try {
+      const upbit = await fetchUpbitCandlesCached(market, timeframe, upbitCount, marketChanged);
+      if (upbit.length >= MIN_INITIAL_BARS && barsHaveVolume(upbit)) return upbit;
+    } catch {
+      /* Upbit 실패 시 backend 시도 */
+    }
+  }
+
   let bars: OHLCVBar[] = [];
   try {
     bars = await fetchInitialBarsWithRetry(market, candleType, count);
   } catch {
     bars = [];
   }
-  if (bars.length < MIN_INITIAL_BARS) {
+
+  const needsUpbitFallback = bars.length < MIN_INITIAL_BARS || !barsHaveVolume(bars);
+  if (needsUpbitFallback) {
     try {
       const fallback = await fetchUpbitCandlesCached(
         market,
         timeframe,
-        Math.min(count, 200),
+        upbitCount,
         marketChanged,
       );
-      if (fallback.length > bars.length) bars = fallback;
+      if (fallback.length > bars.length || (barsHaveVolume(fallback) && !barsHaveVolume(bars))) {
+        bars = fallback;
+      }
     } catch {
       /* 폴백 실패 시 backend 결과 유지 */
     }
@@ -182,7 +202,7 @@ export function useStompChartData(
     const count = opts.deepObvHistory
       ? OBV_DEEP_HISTORY
       : DISPLAY_COUNT + WARMUP_COUNT;
-    loadInitialBars(market, timeframe, count, marketChanged)
+    loadInitialBars(market, timeframe, count, marketChanged, opts.deepObvHistory === true)
       .then(newBars => {
         if (cancelled) return;
         barsRef.current = newBars;