diff --git a/frontend/src/App.css b/frontend/src/App.css
index 36579d8..b9d6a6f 100644
--- a/frontend/src/App.css
+++ b/frontend/src/App.css
@@ -947,6 +947,10 @@ html.theme-blue {
 .tv-chart-wrap--candle-only {
   overflow-y: hidden;
 }
+/* 초기 로드 중 LWC pane·구분선이 순차 노출되는 것 방지 */
+.tv-chart-wrap--bootstrapping .chart-container {
+  visibility: hidden;
+}
 .tv-chart-wrap::-webkit-scrollbar       { width: 6px; }
 .tv-chart-wrap::-webkit-scrollbar-track { background: transparent; }
 .tv-chart-wrap::-webkit-scrollbar-thumb { background: var(--bg4); border-radius: 3px; }
@@ -1142,6 +1146,12 @@ html.theme-blue {
   color: var(--text2);
   font-size: 13px;
 }
+/* 실시간 차트 영역 중앙 단일 로딩 (tv-chart-wrap 내부) */
+.tv-chart-wrap .chart-loading--chart-area {
+  z-index: 920;
+  background: var(--bg, #131722);
+  pointer-events: none;
+}
 .loading-spinner {
   width: 32px; height: 32px;
   border: 3px solid var(--bg4);
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 2863567..ae0de4c 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -2274,23 +2274,10 @@ function App() {
             legend={legend}
           />
 
-          {/* 로딩 오버레이 */}
-          {useUpbit && isLoading && (
-            <div className="chart-loading">
-              <div className="loading-spinner" />
-              <span>업비트 데이터 로딩 중...</span>
-            </div>
-          )}
-          {isSingleLoadingMore && (
-            <div className="chart-history-loading">
-              <div className="loading-spinner" style={{ width: 14, height: 14 }} />
-              <span>과거 데이터 로딩...</span>
-            </div>
-          )}
-
           <TradingChart
             key={chartMountKey}
             chartVisible={chartVisible}
+            dataLoading={useUpbit && isLoading}
             bars={bars} barsMarket={barsMarket} market={symbol} timeframe={timeframe} displayTimezone={displayTimezone}
             chartType={chartType} theme={theme} mode={mode}
             indicators={effectiveIndicators} drawingTool={drawingTool}
@@ -2362,6 +2349,12 @@ function App() {
             volumeVisible={chartVolumeVisible}
             paneSeparatorOptions={chartPaneSeparator}
           />
+          {isSingleLoadingMore && (
+            <div className="chart-history-loading">
+              <div className="loading-spinner" style={{ width: 14, height: 14 }} />
+              <span>과거 데이터 로딩...</span>
+            </div>
+          )}
 
           {/* 백테스팅 결과 통계 배지 */}
           {btMatchesChart && layoutDef.count === 1 && (
diff --git a/frontend/src/components/TradingChart.tsx b/frontend/src/components/TradingChart.tsx
index 71e641f..6595f1a 100644
--- a/frontend/src/components/TradingChart.tsx
+++ b/frontend/src/components/TradingChart.tsx
@@ -59,6 +59,7 @@ import CandlePaneControls from './CandlePaneControls';
 import { getKoreanName } from '../utils/marketNameCache';
 import { DEFAULT_DISPLAY_TIMEZONE } from '../utils/timezone';
 import { chartHasStaleIndicators, classifyIndicatorChartChange, singleIndParamKey } from '../utils/indicatorChartSync';
+import { sortIndicatorsForPaneLoad } from '../utils/indicatorPaneMerge';
 import type { ChartPaneSeparatorOptions } from '../types/chartPaneSeparator';
 import PaneSeparatorOverlay from './PaneSeparatorOverlay';
 
@@ -148,6 +149,8 @@ interface TradingChartProps {
   showPaneLegend?: boolean;
   /** 크로스헤어 이동 시 OHLC·보조지표 수치 표시 (기본 true) */
   crosshairInfoVisible?: boolean;
+  /** 외부 캔들 데이터 fetch 중 (실시간 차트 초기 로딩) */
+  dataLoading?: boolean;
 }
 
 const TradingChart: React.FC<TradingChartProps> = ({
@@ -184,6 +187,7 @@ const TradingChart: React.FC<TradingChartProps> = ({
   paneLayoutClamp = false,
   showPaneLegend = true,
   crosshairInfoVisible = true,
+  dataLoading = false,
 }) => {
   const containerRef  = useRef<HTMLDivElement>(null);
   const wrapperRef    = useRef<HTMLDivElement>(null);   // 스크롤 래퍼
@@ -252,6 +256,8 @@ const TradingChart: React.FC<TradingChartProps> = ({
 
   const chartTimeFormat = useChartTimeFormat();
   const [chartMgr, setChartMgr] = useState<ChartManager | null>(null);
+  /** 초기 reloadAll 완료 전 — pane 구분선·부분 레이아웃 노출 방지 */
+  const [chartPaintReady, setChartPaintReady] = useState(false);
   /** 캔들 pane 전체보기 (오버레이 지표 유지, 하단 보조지표 pane 숨김) */
   const [candleOnlyMode, setCandleOnlyMode] = useState(false);
   const paneDragRef = useRef<((id: string, e: React.PointerEvent) => void) | null>(null);
@@ -637,6 +643,7 @@ const TradingChart: React.FC<TradingChartProps> = ({
 
     barsRef.current = newBars;
     reloadInFlightRef.current = true;
+    setChartPaintReady(false);
 
     try {
       do {
@@ -657,21 +664,12 @@ const TradingChart: React.FC<TradingChartProps> = ({
         mgr.setTheme(th);
         mgr.setLogScale(ls);
         mgr.setDisplayTimezone(displayTimezone, timeframe, chartTimeFormat);
-        commitCandleLayout(mgr);
-        onCandlesReady?.();
         lastAppliedMarketRef.current = market;
 
-        let stale = false;
-        for (const ind of inds) {
-          if (gen !== reloadGenRef.current) {
-            prevBarsKey.current = '';
-            stale = true;
-            break;
-          }
-          await mgr.addIndicator(ind);
+        const sortedInds = sortIndicatorsForPaneLoad(inds);
+        if (sortedInds.length > 0) {
+          await mgr.addIndicatorsBatch(sortedInds);
         }
-        if (stale) break;
-
         if (gen !== reloadGenRef.current) {
           prevBarsKey.current = '';
           break;
@@ -688,7 +686,6 @@ const TradingChart: React.FC<TradingChartProps> = ({
             if (gen !== reloadGenRef.current) break;
           }
           if (mgr.getLoadedIndicatorCount() < expected) {
-            commitCandleLayout(mgr);
             if (reloadRetryRef.current < 6) {
               reloadRetryRef.current += 1;
               queueIndicatorRecovery();
@@ -706,10 +703,10 @@ const TradingChart: React.FC<TradingChartProps> = ({
         lastAppliedMarketRef.current = market;
 
         await new Promise<void>(resolve => requestAnimationFrame(() => requestAnimationFrame(() => {
-          applyPaneLayout(mgr);
+          normalizeChartViewport(mgr);
           requestAnimationFrame(() => {
-            const futureBars = mgr.hasIchimoku() ? 28 : 0;
-            mgr.setInitialVisibleRange(DISPLAY_COUNT, futureBars);
+            onCandlesReady?.();
+            setChartPaintReady(true);
             resolve();
           });
         })));
@@ -740,12 +737,15 @@ const TradingChart: React.FC<TradingChartProps> = ({
       } while (reloadCoalesceRef.current);
     } finally {
       reloadInFlightRef.current = false;
+      if (managerRef.current?.hasMainSeries()) {
+        setChartPaintReady(true);
+      }
       if (reloadCoalesceRef.current) {
         reloadCoalesceRef.current = false;
         queueFullReload();
       }
     }
-  }, [applyPaneLayout, commitCandleLayout, normalizeChartViewport, onCandlesReady, onDataLoaded, displayTimezone, timeframe, market, queueFullReload, queueIndicatorRecovery]);
+  }, [normalizeChartViewport, onCandlesReady, onDataLoaded, displayTimezone, timeframe, market, queueFullReload, queueIndicatorRecovery]);
 
   useEffect(() => {
     reloadAllRef.current = reloadAll;
@@ -1022,7 +1022,7 @@ const TradingChart: React.FC<TradingChartProps> = ({
       resizeDebounceRef.current = window.setTimeout(() => {
         resizeDebounceRef.current = null;
         const m = managerRef.current;
-        if (!m) return;
+        if (!m || reloadInFlightRef.current) return;
 
         // 컨테이너가 처음으로 유효한 크기를 가질 때:
         // 데이터가 이미 barsRef에 있지만 차트에 아직 세팅되지 않은 경우 (예: 멀티레이아웃 초기 렌더) 재로드
@@ -1123,6 +1123,7 @@ const TradingChart: React.FC<TradingChartProps> = ({
     reloadCoalesceRef.current = false;
     reloadSafetyTimers.current.forEach(clearTimeout);
     reloadSafetyTimers.current = [];
+    setChartPaintReady(false);
     managerRef.current?.clearForSymbolChange();
     managerRef.current?.cancelPendingIndicatorUpdates();
   }, [market, timeframe]);
@@ -1338,8 +1339,9 @@ const TradingChart: React.FC<TradingChartProps> = ({
     if (!canApplyChartBars(bars, barsMarket, market)) return;
     if (!mgr.hasMainSeries()) return;
 
-    const timers = [0, 150, 400, 800, 1500, 2500, 4000].map(delay =>
+    const timers = [600, 1200, 2500, 4000].map(delay =>
       window.setTimeout(() => {
+        if (reloadInFlightRef.current) return;
         const m = managerRef.current;
         if (!m?.hasMainSeries()) return;
         const w = wrapperRef.current;
@@ -1498,20 +1500,28 @@ const TradingChart: React.FC<TradingChartProps> = ({
     setCtxMenu(null);
   }, [ctxMenu, market]);
 
+  const showChartLoading = !chartPaintReady || dataLoading;
+
   return (
     // wrapperRef: 스크롤 영역 (overflow-y: auto → App.css .tv-chart-wrap)
     <div
       ref={wrapperRef}
-      className={`tv-chart-wrap${candleOnlyMode ? ' tv-chart-wrap--candle-only' : ''}`}
+      className={`tv-chart-wrap${candleOnlyMode ? ' tv-chart-wrap--candle-only' : ''}${chartPaintReady ? '' : ' tv-chart-wrap--bootstrapping'}`}
       style={{ flex: 1, position: 'relative', minHeight: 0 }}
       onPointerMove={handleWrapperMouseMove}
     >
+      {showChartLoading && (
+        <div className="chart-loading chart-loading--chart-area" role="status" aria-live="polite">
+          <div className="loading-spinner" />
+          <span>차트 로딩중...</span>
+        </div>
+      )}
       <div className="chart-main-row">
         <div
           ref={containerRef}
           className="chart-container"
         />
-        {chartMgr && !candleOnlyMode && showPaneLegend && (
+        {chartMgr && !candleOnlyMode && showPaneLegend && chartPaintReady && (
           <ChartRightToolbar
             manager={chartMgr}
             indicators={indicators}
@@ -1546,7 +1556,7 @@ const TradingChart: React.FC<TradingChartProps> = ({
           getContainer={() => containerRef.current}
         />
       )}
-      {chartMgr && paneSeparatorOptions && (
+      {chartMgr && chartPaintReady && paneSeparatorOptions && (
         <PaneSeparatorOverlay
           manager={chartMgr}
           options={paneSeparatorOptions}
@@ -1576,7 +1586,7 @@ const TradingChart: React.FC<TradingChartProps> = ({
           onRestore={() => setCandleOnlyMode(false)}
         />
       )}
-      {chartMgr && !candleOnlyMode && showPaneLegend && (
+      {chartMgr && !candleOnlyMode && showPaneLegend && chartPaintReady && (
         <PaneLegendPortal
           key={indKey(indicators)}
           manager={chartMgr}
diff --git a/frontend/src/styles/tradeNotificationList.css b/frontend/src/styles/tradeNotificationList.css
index 2440568..1f6d345 100644
--- a/frontend/src/styles/tradeNotificationList.css
+++ b/frontend/src/styles/tradeNotificationList.css
@@ -56,9 +56,9 @@
 
 /* 목록 한 줄 = 알림상세 · 신호일치율 · 캔들 · 보조지표(1칸) — 가로 100% 꽉 참 */
 .tnl-row-gallery {
-  --tnl-summary-card-width: 320px;
-  --tnl-signal-slot-width: 300px;
-  --tnl-chart-card-width: 280px;
+  --tnl-summary-card-width: 288px;
+  --tnl-signal-slot-width: 308px;
+  --tnl-chart-card-width: 294px;
   display: flex;
   flex-direction: row;
   align-items: stretch;
@@ -71,17 +71,17 @@
 }
 
 .tnl-row-gallery-detail {
-  flex: 1.15 1 0;
+  flex: 1 1 0;
   min-width: 0;
 }
 
 .tnl-row-gallery-signal {
-  flex: 1 1 0;
+  flex: 1.05 1 0;
   min-width: 0;
 }
 
 .tnl-row-gallery-candle {
-  flex: 1 1 0;
+  flex: 1.05 1 0;
   min-width: 0;
   height: 300px;
   max-height: 300px;
@@ -107,7 +107,7 @@
 }
 
 .tnl-row-gallery-indicators {
-  flex: 1 1 0;
+  flex: 1.05 1 0;
   min-width: 0;
 }
 
@@ -123,9 +123,9 @@
 }
 
 .tnl-row-gallery--chart-expanded .tnl-row-gallery-detail {
-  flex: 0 0 min(28%, var(--tnl-summary-card-width));
-  width: min(28%, var(--tnl-summary-card-width));
-  min-width: min(240px, var(--tnl-summary-card-width));
+  flex: 0 0 min(26%, var(--tnl-summary-card-width));
+  width: min(26%, var(--tnl-summary-card-width));
+  min-width: min(220px, var(--tnl-summary-card-width));
   max-width: var(--tnl-summary-card-width);
 }
 
@@ -1213,7 +1213,7 @@ ul.tnl-list.tnl-list--grid {
   }
 
   .tnl-row-gallery {
-    --tnl-summary-card-width: min(100%, 320px);
+    --tnl-summary-card-width: min(100%, 288px);
   }
 
   .tnl-row-gallery-detail,
diff --git a/frontend/src/utils/ChartManager.ts b/frontend/src/utils/ChartManager.ts
index 9b8fa9e..5d2310f 100644
--- a/frontend/src/utils/ChartManager.ts
+++ b/frontend/src/utils/ChartManager.ts
@@ -869,11 +869,12 @@ export class ChartManager {
     this._reapplyAllPatternMarkers();
     this._removeExtraSubPanes();
 
-    // ② 새 순서로 재추가 (병합 호스트 → 멤버 순)
+    // ② 새 순서로 재추가 (병합 호스트 → 멤버 순) — 레이아웃은 마지막에 한 번만
     this._indRunning = false;
-    for (const ind of sortIndicatorsForPaneLoad(inds)) {
+    const sorted = sortIndicatorsForPaneLoad(inds);
+    for (const ind of sorted) {
       if (this._indicatorLoadStale(loadGen)) break;
-      await this.addIndicator(ind);
+      await this.addIndicator(ind, { skipLayout: true });
     }
 
     if (this._indicatorLoadStale(loadGen)) return;
diff --git a/frontend/src/utils/dataGenerator.ts b/frontend/src/utils/dataGenerator.ts
index 1de8a5d..85deb92 100644
--- a/frontend/src/utils/dataGenerator.ts
+++ b/frontend/src/utils/dataGenerator.ts
@@ -97,17 +97,13 @@ export function formatChartAxisPrice(price: number): string {
   });
 }
 
-/** 보조지표 pane 우측 가격축·시리즈 라벨 (소수점 표시) */
+/** 보조지표 pane 우측 가격축·시리즈 라벨 (소수점 2자리 고정) */
 export function formatIndicatorAxisPrice(price: number): string {
   if (!Number.isFinite(price)) return String(price);
-  const abs = Math.abs(price);
-  if (abs >= 1_000) {
-    return price.toLocaleString('en-US', { minimumFractionDigits: 1, maximumFractionDigits: 1 });
-  }
-  if (abs >= 1) {
-    return price.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
-  }
-  return price.toLocaleString('en-US', { minimumFractionDigits: 2, maximumFractionDigits: 4 });
+  return price.toLocaleString('en-US', {
+    minimumFractionDigits: 2,
+    maximumFractionDigits: 2,
+  });
 }
 
 export function formatTime(ts: number, timeframe: Timeframe): string {