diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 55b8b9b..9b9a7a2 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -689,8 +689,9 @@ function App() {
   }, [symbol]);
 
   useEffect(() => {
-    if (appSettingsLoaded) refreshPaperAccount();
-  }, [appSettingsLoaded, refreshPaperAccount]);
+    if (!appSettingsLoaded || !formalLogin) return;
+    refreshPaperAccount();
+  }, [appSettingsLoaded, formalLogin, refreshPaperAccount]);
 
   useEffect(() => {
     if (!appSettingsLoaded || !appDefaults.fcmPushEnabled) return;
@@ -702,8 +703,9 @@ function App() {
   }, [appSettingsLoaded, appDefaults.fcmPushEnabled]);
 
   useEffect(() => {
-    if (appSettingsLoaded && paperTradingEnabled) refreshPaperAccount(symbol);
-  }, [symbol, appSettingsLoaded, paperTradingEnabled, refreshPaperAccount]);
+    if (!appSettingsLoaded || !formalLogin || !paperTradingEnabled) return;
+    refreshPaperAccount(symbol);
+  }, [symbol, appSettingsLoaded, formalLogin, paperTradingEnabled, refreshPaperAccount]);
 
   const [alerts, setAlerts] = useState<Array<{ price: number; label: string }>>(
     (initial.alertPrices ?? []).map(p => ({ price: p, label: '' }))
@@ -808,8 +810,12 @@ function App() {
   }, []);
 
   useEffect(() => {
+    if (!formalLogin) {
+      setActiveLiveSettings([]);
+      return;
+    }
     refreshActiveLiveSettings();
-  }, [refreshActiveLiveSettings, isVirtualActive, virtualMonitoredMarkets.join(','), virtualSession.executionType, virtualSession.positionMode]);
+  }, [formalLogin, refreshActiveLiveSettings, isVirtualActive, virtualMonitoredMarkets.join(','), virtualSession.executionType, virtualSession.positionMode]);
 
   useEffect(() => {
     const onVirtualChanged = () => refreshActiveLiveSettings();
@@ -818,7 +824,7 @@ function App() {
   }, [refreshActiveLiveSettings]);
 
   useEffect(() => {
-    if (!appSettingsLoaded) return;
+    if (!appSettingsLoaded || !formalLogin) return;
     if (isVirtualActive) {
       const active = activeLiveSettings.find(s => s.market === symbol);
       setLiveStrategyCandleTypes(active?.strategyCandleTypes);
@@ -827,7 +833,7 @@ function App() {
     loadLiveStrategySettings(symbol)
       .then(s => setLiveStrategyCandleTypes(s.strategyCandleTypes))
       .catch(() => { /* optional */ });
-  }, [symbol, appSettingsLoaded, appDefaults.liveStrategyId, isVirtualActive, activeLiveSettings]);
+  }, [symbol, appSettingsLoaded, formalLogin, appDefaults.liveStrategyId, isVirtualActive, activeLiveSettings]);
 
   const liveStrategySettings: LiveStrategySettingsDto = useMemo(() => {
     if (isVirtualActive) {
@@ -876,6 +882,10 @@ function App() {
   }, [monitoredMarkets, activeLiveSettings, marketSubscriptions, liveStrategyCandleTypes]);
 
   useEffect(() => {
+    if (!formalLogin) {
+      setMarketSubscriptions([]);
+      return;
+    }
     if (monitoredMarkets.length === 0) {
       setMarketSubscriptions([]);
       return;
@@ -893,7 +903,7 @@ function App() {
     loadActiveLiveStrategySettings()
       .then(list => setMarketSubscriptions(expandLiveStrategySubscriptions(list)))
       .catch(() => { /* liveStompSubscriptions 폴백 */ });
-  }, [isVirtualActive, appDefaults.liveStrategyCheck, appDefaults.liveStrategyId, monitoredMarkets.join(','), activeLiveSettings]);
+  }, [formalLogin, isVirtualActive, appDefaults.liveStrategyCheck, appDefaults.liveStrategyId, monitoredMarkets.join(','), activeLiveSettings]);
 
   const handleLiveSettingsChange = useCallback((saved: LiveStrategySettingsDto) => {
     if (isVirtualActive) return;
@@ -998,8 +1008,12 @@ function App() {
   }, []);
 
   useEffect(() => {
+    if (!formalLogin) {
+      setLiveStrategies([]);
+      return;
+    }
     refreshLiveStrategies();
-  }, [menuPage, showLivePanel, refreshLiveStrategies]);
+  }, [menuPage, showLivePanel, formalLogin, refreshLiveStrategies]);
 
   const liveNotifierRef = useRef<LiveSignalNotifierHandle>(null);
   const clearLiveMarkers = useCallback(() => {
@@ -2653,6 +2667,7 @@ function App() {
           onOpenChange={isMobile ? setMobileRightOpen : undefined}
           activeTab={isMobile ? mobileRightTab : undefined}
           onTabChange={isMobile ? setMobileRightTab : undefined}
+          wsFeedEnabled={chartScreenActive && useUpbit}
           market={chartSymbol}
           tradePrice={chartTicker?.tradePrice ?? null}
           asks={orderbook.asks}
diff --git a/frontend/src/components/RightSidePanel.tsx b/frontend/src/components/RightSidePanel.tsx
index 6946d1d..ff4ec88 100644
--- a/frontend/src/components/RightSidePanel.tsx
+++ b/frontend/src/components/RightSidePanel.tsx
@@ -46,6 +46,8 @@ export interface RightSidePanelProps {
   paperTradingEnabled?: boolean;
   paperAutoTradeEnabled?: boolean;
   onPaperOrderFilled?: () => void;
+  /** 차트 화면·업비트 종목일 때만 체결 WS/REST */
+  wsFeedEnabled?: boolean;
 }
 
 const RightSidePanel: React.FC<RightSidePanelProps> = ({
@@ -74,6 +76,7 @@ const RightSidePanel: React.FC<RightSidePanelProps> = ({
   paperTradingEnabled = false,
   paperAutoTradeEnabled = false,
   onPaperOrderFilled,
+  wsFeedEnabled = true,
 }) => {
   const [openInternal, setOpenInternal] = useState(false);
   const [tabInternal, setTabInternal] = useState<TradeRightPanelTab>('trade');
@@ -81,7 +84,7 @@ const RightSidePanel: React.FC<RightSidePanelProps> = ({
 
   const isOpenControlled = openControlled !== undefined && onOpenChange !== undefined;
   const open = isOpenControlled ? !!openControlled : openInternal;
-  const { trades: recentTrades, strength: tradeStrength } = useUpbitRecentTrades(market, open);
+  const { trades: recentTrades, strength: tradeStrength } = useUpbitRecentTrades(market, open && wsFeedEnabled);
   const setOpen = (next: boolean | ((p: boolean) => boolean)) => {
     const cur = isOpenControlled ? !!openControlled : openInternal;
     const value = typeof next === 'function' ? next(cur) : next;
diff --git a/frontend/src/components/StrategyEditorPage.tsx b/frontend/src/components/StrategyEditorPage.tsx
index ac4ab57..4d80c25 100644
--- a/frontend/src/components/StrategyEditorPage.tsx
+++ b/frontend/src/components/StrategyEditorPage.tsx
@@ -5,7 +5,7 @@ import React, { useState, useCallback, useEffect, useMemo, useRef } from 'react'
 import { ReactFlowProvider } from '@xyflow/react';
 import DraggableModalFrame from './DraggableModalFrame';
 import type { Theme } from '../types/index';
-import { loadStrategies, loadStrategy, saveStrategy, deleteStrategy, type StrategyDto as ApiStrategyDto } from '../utils/backendApi';
+import { hasRegisteredUser, loadStrategies, loadStrategy, saveStrategy, deleteStrategy, type StrategyDto as ApiStrategyDto } from '../utils/backendApi';
 import { syncStrategyTimeframesFromLayoutIfNeeded } from '../utils/strategyTimeframeSync';
 import type { LogicNode } from '../utils/strategyTypes';
 import {
@@ -512,6 +512,7 @@ export default function StrategyEditorPage({ theme }: Props) {
   useEffect(() => { saveStratsLocal(strategies); }, [strategies]);
 
   useEffect(() => {
+    if (!hasRegisteredUser()) return;
     loadStrategies().then(async list => {
       if (list?.length) {
         setStrategies(list.map(s => ({
@@ -647,6 +648,9 @@ export default function StrategyEditorPage({ theme }: Props) {
 
     // flow layout START 분봉이 DB DSL보다 최신이면 서버에 반영 (실시간 평가는 DB 기준)
     void (async () => {
+      if (!hasRegisteredUser() || s.id == null) return;
+      const exists = await loadStrategy(s.id);
+      if (!exists) return;
       const synced = await syncStrategyTimeframesFromLayoutIfNeeded(s.id, { ...s, flowLayout: stored ?? s.flowLayout });
       if (!synced) return;
       try {
diff --git a/frontend/src/utils/backendApi.ts b/frontend/src/utils/backendApi.ts
index 68cd4db..b183199 100644
--- a/frontend/src/utils/backendApi.ts
+++ b/frontend/src/utils/backendApi.ts
@@ -52,6 +52,14 @@ function getDeviceId(): string {
   return id;
 }
 
+/** 정식 회원(userId) — 매매·전략·모의 API 필수 */
+export function hasRegisteredUser(): boolean {
+  const id = localStorage.getItem('gc_user_id');
+  if (!id) return false;
+  const n = Number(id);
+  return Number.isFinite(n) && n > 0;
+}
+
 function authHeaders(): Record<string, string> {
   const headers: Record<string, string> = {
     'Content-Type': 'application/json',
@@ -90,7 +98,12 @@ async function request<T>(path: string, init?: RequestInit): Promise<T | null> {
     });
     if (res.status === 204) return null;
     if (!res.ok) {
-      console.error(`[backendApi] ${init?.method ?? 'GET'} ${path} → ${res.status}`);
+      const method = init?.method ?? 'GET';
+      const guest403 = res.status === 403 && !hasRegisteredUser();
+      const missing404 = res.status === 404 && method === 'GET';
+      if (!guest403 && !missing404) {
+        console.error(`[backendApi] ${method} ${path} → ${res.status}`);
+      }
       return null;
     }
     return (await res.json()) as T;
@@ -759,6 +772,7 @@ export interface PaperOrderRequest {
 }
 
 export async function loadPaperSummary(markPrices?: Record<string, number>): Promise<PaperSummaryDto | null> {
+  if (!hasRegisteredUser()) return null;
   if (markPrices && Object.keys(markPrices).length > 0) {
     return request<PaperSummaryDto>('/paper/summary', {
       method: 'POST',
@@ -1041,11 +1055,13 @@ export interface StrategyDto {
 
 /** 전략 목록 로드 */
 export async function loadStrategies(): Promise<StrategyDto[]> {
+  if (!hasRegisteredUser()) return [];
   return (await request<StrategyDto[]>('/strategies')) ?? [];
 }
 
 /** 단일 전략 로드 */
 export async function loadStrategy(id: number): Promise<StrategyDto | null> {
+  if (!hasRegisteredUser()) return null;
   return request<StrategyDto>(`/strategies/${id}`);
 }
 
@@ -1290,6 +1306,9 @@ export interface LiveStrategySettingsDto {
 export async function loadLiveStrategySettings(
   market: string,
 ): Promise<LiveStrategySettingsDto> {
+  if (!hasRegisteredUser()) {
+    return { market, strategyId: null, isLiveCheck: false, executionType: 'CANDLE_CLOSE', positionMode: 'LONG_ONLY' };
+  }
   return (await request<LiveStrategySettingsDto>(
     `/strategy/settings?market=${encodeURIComponent(market)}`,
   )) ?? { market, strategyId: null, isLiveCheck: false, executionType: 'CANDLE_CLOSE', positionMode: 'LONG_ONLY' };
@@ -1317,6 +1336,7 @@ export function expandLiveStrategySubscriptions(
 
 /** 현재 디바이스에서 실시간 체크 ON + 전략 지정된 종목 목록 */
 export async function loadActiveLiveStrategySettings(): Promise<LiveStrategySettingsDto[]> {
+  if (!hasRegisteredUser()) return [];
   return (await request<LiveStrategySettingsDto[]>('/strategy/settings/active')) ?? [];
 }
 
@@ -1376,12 +1396,14 @@ export async function fetchLiveConditionStatus(
 
 /** 전략 DSL에 포함된 평가 시간봉 목록 (실시간 체크·STOMP 구독용) */
 export async function loadStrategyTimeframes(strategyId: number): Promise<string[]> {
+  if (!hasRegisteredUser()) return ['1m'];
   const list = await request<string[]>(`/strategies/${strategyId}/timeframes`);
   return list?.length ? list : ['1m'];
 }
 
 /** DB DSL TIMEFRAME 래핑 보정 (3분봉 전략이 1m으로 평가되는 레거시 수정) */
 export async function repairStrategyTimeframes(strategyId: number): Promise<void> {
+  if (!hasRegisteredUser()) return;
   await request(`/strategies/${strategyId}/repair-timeframes`, { method: 'POST' });
 }
 
diff --git a/frontend/src/utils/strategyTimeframeSync.ts b/frontend/src/utils/strategyTimeframeSync.ts
index dad9a51..1eb70fe 100644
--- a/frontend/src/utils/strategyTimeframeSync.ts
+++ b/frontend/src/utils/strategyTimeframeSync.ts
@@ -146,7 +146,7 @@ export async function syncStrategyTimeframesFromLayoutIfNeeded(
   strategy?: StrategyDto | null,
 ): Promise<boolean> {
   const strat = (await loadStrategy(strategyId)) ?? strategy ?? null;
-  if (!strat) return true;
+  if (!strat) return false;
 
   const uiTfs = collectUiEvaluationTimeframes(strategyId, strat);
   if (uiTfs.length === 0) return true;
diff --git a/frontend/src/utils/upbitWsBroker.ts b/frontend/src/utils/upbitWsBroker.ts
index 6997828..ea45bd9 100644
--- a/frontend/src/utils/upbitWsBroker.ts
+++ b/frontend/src/utils/upbitWsBroker.ts
@@ -64,6 +64,12 @@ function listenerCount(): number {
   return listeners.size;
 }
 
+function mayOpenSocket(): boolean {
+  if (listenerCount() === 0) return false;
+  if (typeof document !== 'undefined' && document.visibilityState === 'hidden') return false;
+  return true;
+}
+
 function cancelPendingDisconnect(): void {
   if (disconnectTimer) {
     clearTimeout(disconnectTimer);
@@ -134,7 +140,7 @@ function dispatch(text: string): void {
 }
 
 function scheduleReconnect(): void {
-  if (listenerCount() === 0) return;
+  if (!mayOpenSocket()) return;
   if (reconnectTimer) return;
   const delay = Math.min(RECONNECT_BASE * 2 ** retryCount, RECONNECT_MAX);
   retryCount += 1;
@@ -236,6 +242,17 @@ export function subscribeUpbitWsConnection(listener: ConnectionListener): () =>
   return () => connectionListeners.delete(listener);
 }
 
+if (typeof document !== 'undefined') {
+  document.addEventListener('visibilitychange', () => {
+    if (document.visibilityState === 'hidden') {
+      cancelPendingConnect();
+      if (listenerCount() === 0) teardownSocket();
+      return;
+    }
+    if (mayOpenSocket()) scheduleConnect();
+  });
+}
+
 /**
  * 업비트 WS 채널 구독 (참조 카운트). codes 가 비어 있으면 구독하지 않음.
  */
diff --git a/frontend/src/utils/virtualTargetsHydrate.ts b/frontend/src/utils/virtualTargetsHydrate.ts
index 6519a93..1572dcb 100644
--- a/frontend/src/utils/virtualTargetsHydrate.ts
+++ b/frontend/src/utils/virtualTargetsHydrate.ts
@@ -1,7 +1,7 @@
 /**
  * ui_preferences.virtual.targets 가 비었을 때 서버·레거시에서 투자대상 복구
  */
-import { loadActiveLiveStrategySettings, loadWatchlist } from './backendApi';
+import { hasRegisteredUser, loadActiveLiveStrategySettings, loadWatchlist } from './backendApi';
 import {
   loadVirtualSession,
   loadVirtualTargets,
@@ -67,6 +67,8 @@ export async function hydrateVirtualTargetsIfEmpty(): Promise<VirtualTargetItem[
   const session = loadVirtualSession();
   const globalId = session.globalStrategyId;
 
+  if (!hasRegisteredUser()) return [];
+
   try {
     const active = await loadActiveLiveStrategySettings();
     if (active.length > 0) return fromLiveSettings(active, globalId);