diff --git a/web/src/views/SimpleView.tsx b/web/src/views/SimpleView.tsx
index 87af9d8..f3a198f 100644
--- a/web/src/views/SimpleView.tsx
+++ b/web/src/views/SimpleView.tsx
@@ -1,4 +1,4 @@
-import { useEffect, useMemo, useState } from 'react';
+import { useEffect, useMemo, useRef, useState } from 'react';
 import type { FormEvent } from 'react';
 import { Pencil, RefreshCw, Trash2 } from 'lucide-react';
 import { useAppContext } from '../context/AppContext';
@@ -323,6 +323,22 @@ function normalizeKnownSymbol(value: unknown): string | null {
   return normalized ? normalized : null;
 }
 
+function normalizeRuntimeArray<T>(value: unknown): T[] {
+  if (Array.isArray(value)) return value as T[];
+  if (value && typeof value === 'object' && Symbol.iterator in (value as object)) {
+    try {
+      return Array.from(value as Iterable<T>);
+    } catch {
+      return [];
+    }
+  }
+  return [];
+}
+
+function isLikelySymbolCandidate(symbol: string): boolean {
+  return /^[A-Z0-9./-]{1,20}$/.test(symbol);
+}
+
 function describeSavedSetup(entry: ManualEntryPayload): string {
   const side = normalizeSetupSide(entry.simple_side);
   const symbol = String(entry.symbol || '').trim().toUpperCase();
@@ -367,17 +383,20 @@ export function SimpleView() {
   const [loadingPrice, setLoadingPrice] = useState(false);
   const [message, setMessage] = useState<string | null>(null);
   const [error, setError] = useState<string | null>(null);
+  const marketPriceRequestSymbolRef = useRef<string>('');
 
   const normalizedSymbol = draft.symbol.trim().toUpperCase();
-  const livePrice = normalizedSymbol ? Number(botState.symbols?.[normalizedSymbol]?.price || 0) : 0;
+  const symbolState = botState?.symbols && typeof botState.symbols === 'object' ? botState.symbols : {};
+  const livePrice = normalizedSymbol ? Number(symbolState?.[normalizedSymbol]?.price || 0) : 0;
   const simpleAutoProfile = useMemo(
     () => profiles.find((profile) => matchesSimpleAutoProfile(profile)) || null,
     [profiles],
   );
 
   const simpleHoldings = useMemo(() => {
+    const positions = normalizeRuntimeArray<typeof botState.positions[number]>(botState?.positions);
     const simpleProfileId = simpleAutoProfile?.id;
-    return botState.positions
+    return positions
       .filter((position) => !simpleProfileId || position.profileId === simpleProfileId)
       .map((position) => ({
         symbol: String(position.symbol || '').trim().toUpperCase(),
@@ -387,14 +406,15 @@ export function SimpleView() {
         tradeId: position.tradeId,
       }))
       .filter((position) => position.symbol && position.size > 0 && position.entryPrice > 0);
-  }, [botState.positions, simpleAutoProfile?.id]);
+  }, [botState?.positions, simpleAutoProfile?.id]);
 
   const runtimeOrders = useMemo(() => {
-    return Array.from(botState.orders.values()).filter((order) => {
+    const orders = normalizeRuntimeArray<Record<string, any>>(botState?.orders);
+    return orders.filter((order) => {
       if (!simpleAutoProfile?.id) return true;
       return String(order.profileId || '').trim() === simpleAutoProfile.id;
     });
-  }, [botState.orders, simpleAutoProfile?.id]);
+  }, [botState?.orders, simpleAutoProfile?.id]);
 
   const matchingHolding = useMemo(
     () => simpleHoldings.find((holding) => holding.symbol === normalizedSymbol) || null,
@@ -402,11 +422,11 @@ export function SimpleView() {
   );
 
   const supportedSymbols = useMemo(() => {
-    const fromState = Object.keys(botState.symbols || {}).map(normalizeKnownSymbol).filter(Boolean) as string[];
+    const fromState = Object.keys(symbolState || {}).map(normalizeKnownSymbol).filter(Boolean) as string[];
     const fromSetups = savedSetups.map((entry) => normalizeKnownSymbol(entry.symbol)).filter(Boolean) as string[];
     const fromHoldings = simpleHoldings.map((holding) => normalizeKnownSymbol(holding.symbol)).filter(Boolean) as string[];
     return Array.from(new Set([...fromState, ...fromSetups, ...fromHoldings, ...COMMON_SIMPLE_SYMBOLS])).sort((left, right) => left.localeCompare(right));
-  }, [botState.symbols, savedSetups, simpleHoldings]);
+  }, [symbolState, savedSetups, simpleHoldings]);
 
   const filteredSymbolSuggestions = useMemo(() => {
     if (!normalizedSymbol) {
@@ -457,8 +477,22 @@ export function SimpleView() {
       return;
     }
 
-    void handleLoadMarketPrice();
-  }, [normalizedSymbol, livePrice]);
+    if (!isLikelySymbolCandidate(normalizedSymbol)) {
+      return;
+    }
+
+    if (!supportedSymbols.includes(normalizedSymbol)) {
+      return;
+    }
+
+    const timer = window.setTimeout(() => {
+      void handleLoadMarketPrice();
+    }, 250);
+
+    return () => {
+      window.clearTimeout(timer);
+    };
+  }, [normalizedSymbol, livePrice, draft.currentMarketPrice, loadingPrice, supportedSymbols]);
 
   const previewText = useMemo(
     () => buildPreviewText(draft, draft.side === 'sell' ? matchingHolding : null),
@@ -480,27 +514,37 @@ export function SimpleView() {
 
   async function handleLoadMarketPrice() {
     if (!normalizedSymbol) return;
+    const requestSymbol = normalizedSymbol;
+    marketPriceRequestSymbolRef.current = requestSymbol;
     setLoadingPrice(true);
     setError(null);
     setMessage(null);
 
     try {
       if (livePrice > 0) {
-        updateDraft('currentMarketPrice', livePrice.toFixed(4));
+        if (marketPriceRequestSymbolRef.current === requestSymbol) {
+          updateDraft('currentMarketPrice', livePrice.toFixed(4));
+        }
         return;
       }
 
-      const bars = await fetchChartBars(normalizedSymbol, '1D');
+      const bars = await fetchChartBars(requestSymbol, '1D');
       const lastClose = Number(bars?.[bars.length - 1]?.close || 0);
       if (Number.isFinite(lastClose) && lastClose > 0) {
-        updateDraft('currentMarketPrice', lastClose.toFixed(4));
+        if (marketPriceRequestSymbolRef.current === requestSymbol) {
+          updateDraft('currentMarketPrice', lastClose.toFixed(4));
+        }
       } else {
         throw new Error('No recent market data is available for this symbol right now.');
       }
     } catch (err: any) {
-      setError(err?.message ?? 'Failed to load market data');
+      if (marketPriceRequestSymbolRef.current === requestSymbol) {
+        setError(err?.message ?? 'Failed to load market data');
+      }
     } finally {
-      setLoadingPrice(false);
+      if (marketPriceRequestSymbolRef.current === requestSymbol) {
+        setLoadingPrice(false);
+      }
     }
   }