Enhance environment variable parsing and account snapshot validation

- Introduced `normalizeEnvValue` function to improve handling of environment variable values, including trimming, unquoting, and stripping inline comments.
- Updated `resolveSymbolFromEnv` and parsing functions to utilize the new normalization logic.
- Added `validateAccountSnapshotForSymbol` function to validate account snapshots, ensuring numeric fields are correctly formatted and flagging any issues.
- Implemented tests for environment variable parsing and account snapshot validation to ensure robustness and correctness.

src/config.ts

@@ -105,23 +105,51 @@ export function resolveSymbolFromEnv(explicitExchangeId?: SupportedExchangeId |
     : resolveExchangeId();
   const { envKeys, fallback } = SYMBOL_PRIORITY_BY_EXCHANGE[exchangeId];
   for (const key of envKeys) {
-    const value = process.env[key];
-    if (value && value.trim()) {
-      return value.trim();
+    const value = normalizeEnvValue(process.env[key]);
+    if (value) {
+      return value;
     }
   }
   return fallback;
 }
 
+function normalizeEnvValue(value: string | undefined): string | undefined {
+  if (!value) return undefined;
+  const trimmed = value.trim();
+  if (!trimmed) return undefined;
+
+  const quote = trimmed[0];
+  if ((quote === "'" || quote === "\"") && trimmed.endsWith(quote)) {
+    const unquoted = trimmed.slice(1, -1).trim();
+    return unquoted ? unquoted : undefined;
+  }
+
+  // Allow shell-style inline comments: KEY=value # comment
+  const commentIndexHash = trimmed.search(/\s#/);
+  const commentIndexSemi = trimmed.search(/\s;/);
+  const commentIndex =
+    commentIndexHash === -1
+      ? commentIndexSemi
+      : commentIndexSemi === -1
+        ? commentIndexHash
+        : Math.min(commentIndexHash, commentIndexSemi);
+  if (commentIndex !== -1) {
+    const withoutComment = trimmed.slice(0, commentIndex).trim();
+    return withoutComment ? withoutComment : undefined;
+  }
+
+  return trimmed;
+}
+
 function parseNumber(value: string | undefined, fallback: number): number {
-  if (!value) return fallback;
-  const next = Number(value);
+  const normalized = normalizeEnvValue(value);
+  if (!normalized) return fallback;
+  const next = Number(normalized);
   return Number.isFinite(next) ? next : fallback;
 }
 
 function parseBoolean(value: string | undefined, fallback: boolean): boolean {
-  if (!value) return fallback;
-  const normalized = value.trim().toLowerCase();
+  const normalized = normalizeEnvValue(value)?.toLowerCase();
   if (!normalized) return fallback;
   if (normalized === "1" || normalized === "true" || normalized === "yes" || normalized === "on") return true;
   if (normalized === "0" || normalized === "false" || normalized === "no" || normalized === "off") return false;

src/exchanges/adapter.ts

@@ -37,6 +37,17 @@ export interface FundingRateListener {
   (snapshot: FundingRateSnapshot): void;
 }
 
+export type RestHealthState = "healthy" | "unhealthy";
+export interface RestHealthInfo {
+  consecutiveErrors: number;
+  method?: string;
+  path?: string;
+  error?: string;
+}
+export interface RestHealthListener {
+  (state: RestHealthState, info: RestHealthInfo): void;
+}
+
 export interface ExchangePrecision {
   priceTick: number;
   qtyStep: number;
@@ -69,6 +80,9 @@ export interface ExchangeAdapter {
   // 连接保护相关方法（可选，仅 StandX 支持）
   onConnectionEvent?(listener: ConnectionEventListener): void;
   offConnectionEvent?(listener: ConnectionEventListener): void;
+  onRestHealthEvent?(listener: RestHealthListener): void;
+  offRestHealthEvent?(listener: RestHealthListener): void;
   queryOpenOrders?(): Promise<AsterOrder[]>;
+  queryAccountSnapshot?(): Promise<AsterAccountSnapshot | null>;
   forceCancelAllOrders?(): Promise<boolean>;
 }

src/exchanges/standx/adapter.ts

@@ -7,6 +7,7 @@ import type {
   FundingRateListener,
   KlineListener,
   OrderListener,
+  RestHealthListener,
   TickerListener,
 } from "../adapter";
 import type { AsterOrder, CreateOrderParams } from "../types";
@@ -138,6 +139,14 @@ export class StandxExchangeAdapter implements ExchangeAdapter {
     this.gateway.offConnectionEvent(listener);
   }
 
+  onRestHealthEvent(listener: RestHealthListener): void {
+    this.gateway.onRestHealthEvent(listener);
+  }
+
+  offRestHealthEvent(listener: RestHealthListener): void {
+    this.gateway.offRestHealthEvent(listener);
+  }
+
   /**
    * 查询当前真实的挂单状态（通过 HTTP API）
    * 用于验证实际挂单情况，防止取消请求丢失
@@ -147,6 +156,11 @@ export class StandxExchangeAdapter implements ExchangeAdapter {
     return this.gateway.queryOpenOrders(this.symbol);
   }
 
+  async queryAccountSnapshot() {
+    await this.ensureInitialized("queryAccountSnapshot");
+    return this.gateway.queryAccountSnapshot();
+  }
+
   /**
    * 强制取消所有挂单
    * 会查询当前挂单然后取消，并验证取消成功

src/exchanges/standx/gateway.ts

@@ -8,6 +8,9 @@ import type {
   FundingRateListener,
   KlineListener,
   OrderListener,
+  RestHealthInfo,
+  RestHealthListener,
+  RestHealthState,
   TickerListener,
 } from "../adapter";
 import type {
@@ -62,6 +65,7 @@ const WS_HEARTBEAT_CHECK_INTERVAL = 30_000;
 const WS_DATA_STALE_THRESHOLD = 3000;
 // REST 轮询间隔（毫秒）- WS 断连或数据过时时的 REST 拉取间隔
 const REST_POLL_INTERVAL = 2000;
+const REST_ERROR_DEFENSE_THRESHOLD = 3;
 
 const SUPPORTED_QUOTES = ["USD", "USDT", "USDC", "DUSD"];
 
@@ -420,6 +424,10 @@ export class StandxGateway {
   private readonly virtualStops = new Map<string, VirtualStop>();
 
   private accountSnapshot: AsterAccountSnapshot | null = null;
+  private readonly restHealthListeners = new Set<RestHealthListener>();
+  private restConsecutiveErrors = 0;
+  private restUnhealthy = false;
+  private restLastError: string | null = null;
   private fundingState = new Map<string, FundingState>();
 
   private marketWs: WebSocket | null = null;
@@ -558,6 +566,14 @@ export class StandxGateway {
     this.connectionListeners.add(listener);
   }
 
+  onRestHealthEvent(listener: RestHealthListener): void {
+    this.restHealthListeners.add(listener);
+  }
+
+  offRestHealthEvent(listener: RestHealthListener): void {
+    this.restHealthListeners.delete(listener);
+  }
+
   offConnectionEvent(listener: ConnectionEventListener): void {
     this.connectionListeners.delete(listener);
   }
@@ -1411,7 +1427,7 @@ export class StandxGateway {
     }
   }
 
-  private async refreshAccountSnapshot(): Promise<void> {
+  private async refreshAccountSnapshot(): Promise<AsterAccountSnapshot | null> {
     try {
       const [balance, positions] = await Promise.all([
         this.requestJson<StandxBalanceSnapshot>("/api/query_balance", { method: "GET" }),
@@ -1435,11 +1451,17 @@ export class StandxGateway {
         this.balances.set(token, asset);
       }
       this.emitAccountSnapshot();
+      return this.accountSnapshot;
     } catch (error) {
       this.logger("accountSnapshot", error);
+      return null;
     }
   }
 
+  async queryAccountSnapshot(): Promise<AsterAccountSnapshot | null> {
+    return await this.refreshAccountSnapshot();
+  }
+
   private async refreshOpenOrders(symbol: string): Promise<void> {
     try {
       const ordersPayload = await this.requestJson<unknown>("/api/query_open_orders", {
@@ -1708,22 +1730,70 @@ export class StandxGateway {
         }
       }
     }
-    const response = await fetch(url.toString(), {
-      method: options.method,
-      headers,
-      body: options.method === "GET" ? undefined : body,
-    });
-    const text = await response.text();
-    if (!response.ok) {
-      throw new Error(`${options.method} ${path} failed (${response.status}): ${text}`);
-    }
-    if (!text) {
-      return {} as T;
-    }
     try {
-      return JSON.parse(text) as T;
-    } catch {
-      return text as unknown as T;
+      const response = await fetch(url.toString(), {
+        method: options.method,
+        headers,
+        body: options.method === "GET" ? undefined : body,
+      });
+      const text = await response.text();
+      if (!response.ok) {
+        throw new Error(`${options.method} ${path} failed (${response.status}): ${text}`);
+      }
+      if (!text) {
+        this.recordRestSuccess();
+        return {} as T;
+      }
+      try {
+        const parsed = JSON.parse(text) as T;
+        this.recordRestSuccess();
+        return parsed;
+      } catch {
+        this.recordRestSuccess();
+        return text as unknown as T;
+      }
+    } catch (error) {
+      this.recordRestError({
+        consecutiveErrors: this.restConsecutiveErrors + 1,
+        method: options.method,
+        path,
+        error: error instanceof Error ? error.message : String(error),
+      });
+      throw error;
+    }
+  }
+
+  private recordRestSuccess(): void {
+    if (this.restConsecutiveErrors === 0 && !this.restUnhealthy) return;
+    this.restConsecutiveErrors = 0;
+    this.restLastError = null;
+    if (!this.restUnhealthy) return;
+    this.restUnhealthy = false;
+    this.emitRestHealth("healthy", { consecutiveErrors: 0 });
+  }
+
+  private recordRestError(info: RestHealthInfo): void {
+    this.restConsecutiveErrors = Math.max(0, Number(info.consecutiveErrors) || 0);
+    this.restLastError = info.error ?? this.restLastError;
+
+    if (!this.restUnhealthy && this.restConsecutiveErrors >= REST_ERROR_DEFENSE_THRESHOLD) {
+      this.restUnhealthy = true;
+      this.emitRestHealth("unhealthy", {
+        consecutiveErrors: this.restConsecutiveErrors,
+        method: info.method,
+        path: info.path,
+        error: info.error ?? this.restLastError ?? undefined,
+      });
+    }
+  }
+
+  private emitRestHealth(state: RestHealthState, info: RestHealthInfo): void {
+    for (const listener of this.restHealthListeners) {
+      try {
+        listener(state, info);
+      } catch (error) {
+        this.logger("restHealthListener", error);
+      }
     }
   }
 

src/notifications/telegram.ts

@@ -41,7 +41,11 @@ function formatNotificationMessage(notification: TradeNotification, accountLabel
     lines.push(``);
     for (const [key, value] of Object.entries(notification.details)) {
       if (value != null) {
-        lines.push(`• ${key}: ${value}`);
+        if (Array.isArray(value)) {
+          lines.push(`• ${key}: ${value.join(", ") || "[]"}`);
+        } else {
+          lines.push(`• ${key}: ${value}`);
+        }
       }
     }
   }

src/notifications/types.ts

@@ -7,7 +7,7 @@ export interface TradeNotification {
   title: string;
   message: string;
   accountLabel?: string;
-  details?: Record<string, string | number | boolean | null>;
+  details?: Record<string, string | number | boolean | null | string[]>;
   timestamp?: number;
 }
 

src/strategy/maker-points-engine.ts

@@ -10,9 +10,9 @@ import { formatPriceToString } from "../utils/math";
 import { createTradeLog, type TradeLogEntry } from "../logging/trade-log";
 import { extractMessage, isInsufficientBalanceError, isPrecisionError, isRateLimitError, isUnknownOrderError } from "../utils/errors";
 import { isOrderActiveStatus } from "../utils/order-status";
-import { getPosition, parseSymbolParts } from "../utils/strategy";
+import { getPosition, parseSymbolParts, validateAccountSnapshotForSymbol } from "../utils/strategy";
 import type { PositionSnapshot } from "../utils/strategy";
-import { computePositionPnl } from "../utils/pnl";
+import { computePositionPnl, computeStopLossPnl } from "../utils/pnl";
 import { getDepthBetweenPrices, getMidOrLast, getTopPrices } from "../utils/price";
 import {
   marketClose,
@@ -95,6 +95,8 @@ const STOP_LOSS_CHECK_INTERVAL_MS = 250; // 止损检查最大间隔
 const STOP_LOSS_RETRY_INTERVAL_MS = 500; // 止损失败后重试间隔
 const DATA_STALE_THRESHOLD_MS = 5_000; // 数据过时阈值（5秒）
 const DEFENSE_MODE_CHECK_INTERVAL_MS = 1000; // 防御模式检查间隔
+const ACCOUNT_DATA_STALE_THRESHOLD_MS = 20_000; // 账户数据长期无更新阈值（StandX 有 REST 兜底，长期无更新通常意味着异常）
+const STANDX_REST_ERROR_DEFENSE_THRESHOLD = 3;
 
 export class MakerPointsEngine {
   private accountSnapshot: AsterAccountSnapshot | null = null;
@@ -180,6 +182,9 @@ export class MakerPointsEngine {
   // 防御模式下的 REST 轮询定时器
   private defenseRestPollTimer: ReturnType<typeof setTimeout> | null = null;
   private defenseRestPollActive = false;
+  private standxRestConsecutiveErrors = 0;
+  private standxRestUnhealthy = false;
+  private standxRestLastError: string | null = null;
 
   constructor(private readonly config: MakerPointsConfig, private readonly exchange: ExchangeAdapter) {
     this.tradeLog = createTradeLog(this.config.maxLogEntries);
@@ -276,6 +281,7 @@ export class MakerPointsEngine {
 
   private bootstrap(): void {
     const log: LogHandler = (type, detail) => this.tradeLog.push(type, detail);
+    this.setupRestHealthProtection();
 
     safeSubscribe<AsterAccountSnapshot>(
       this.exchange.watchAccount.bind(this.exchange),
@@ -377,6 +383,36 @@ export class MakerPointsEngine {
     });
   }
 
+  private setupRestHealthProtection(): void {
+    if (!this.exchange.onRestHealthEvent) return;
+    this.exchange.onRestHealthEvent((state, info) => {
+      if (state === "unhealthy") {
+        this.standxRestUnhealthy = true;
+        this.standxRestConsecutiveErrors = Math.max(this.standxRestConsecutiveErrors, info.consecutiveErrors);
+        this.standxRestLastError = info.error ?? this.standxRestLastError;
+        if (!this.defenseMode && this.standxRestConsecutiveErrors >= STANDX_REST_ERROR_DEFENSE_THRESHOLD) {
+          this.enterDefenseMode({
+            standxDepthStale: false,
+            binanceStale: false,
+            standxAccountStale: false,
+            accountInvalid: false,
+            standxRestUnhealthy: true,
+            standxRestConsecutiveErrors: this.standxRestConsecutiveErrors,
+            standxRestLastError: this.standxRestLastError,
+            standxDepthAge: 0,
+            binanceAge: 0,
+            standxAccountAge: 0,
+            accountIssues: [],
+          });
+        }
+      } else if (state === "healthy") {
+        this.standxRestUnhealthy = false;
+        this.standxRestConsecutiveErrors = 0;
+        this.standxRestLastError = null;
+      }
+    });
+  }
+
   /**
    * 处理断连事件
    */
@@ -498,6 +534,26 @@ export class MakerPointsEngine {
         this.emitUpdate();
         return;
       }
+
+      const accountHealth = validateAccountSnapshotForSymbol(this.accountSnapshot, this.config.symbol);
+      if (!accountHealth.ok && !this.defenseMode) {
+        this.enterDefenseMode({
+          standxDepthStale: false,
+          binanceStale: false,
+          standxAccountStale: false,
+          accountInvalid: true,
+          standxRestUnhealthy: false,
+          standxRestConsecutiveErrors: this.standxRestConsecutiveErrors,
+          standxRestLastError: this.standxRestLastError,
+          standxDepthAge: 0,
+          binanceAge: 0,
+          standxAccountAge: 0,
+          accountIssues: accountHealth.issues,
+        });
+        this.emitUpdate();
+        return;
+      }
+
       this.resetReadinessFlags();
       if (!(await this.ensureStartupOrderReset())) {
         this.emitUpdate();
@@ -979,15 +1035,7 @@ export class MakerPointsEngine {
    */
   private computeRealtimePnl(position: PositionSnapshot): number | null {
     const { topBid, topAsk } = getTopPrices(this.depthSnapshot);
-    // 使用实时深度计算 PnL
-    if (topBid != null && topAsk != null) {
-      return computePositionPnl(position, topBid, topAsk);
-    }
-    // 回退到账户推送的数据
-    if (Number.isFinite(position.unrealizedProfit)) {
-      return position.unrealizedProfit;
-    }
-    return null;
+    return computeStopLossPnl(position, topBid, topAsk);
   }
 
   private async checkStopLoss(): Promise<void> {
@@ -1533,24 +1581,36 @@ export class MakerPointsEngine {
 
   /**
    * 检查数据是否过时，进入或退出防御模式
-   * 仅检查深度数据（持续推送），账户数据只在变化时推送，不应作为过时判断依据
+   * StandX 账户数据在 WS 推送异常时会通过 REST 补拉；长期无更新通常意味着 WS/REST 均异常，应进入防御模式
    */
   private checkDataStaleAndDefense(): void {
     const now = Date.now();
     const standxDepthStale = this.lastStandxDepthTime > 0 && (now - this.lastStandxDepthTime) > DATA_STALE_THRESHOLD_MS;
-    // 账户数据只在有变化时推送，不作为过时判断依据
-    // const standxAccountStale = this.lastStandxAccountTime > 0 && (now - this.lastStandxAccountTime) > DATA_STALE_THRESHOLD_MS;
     const binanceStale = this.lastBinanceDepthTime > 0 && (now - this.lastBinanceDepthTime) > DATA_STALE_THRESHOLD_MS;
 
-    const shouldDefend = standxDepthStale || binanceStale;
+    const standxAccountStale =
+      this.lastStandxAccountTime > 0 && (now - this.lastStandxAccountTime) > ACCOUNT_DATA_STALE_THRESHOLD_MS;
+    const accountHealth = validateAccountSnapshotForSymbol(this.accountSnapshot, this.config.symbol);
+    const accountInvalid = this.accountSnapshot != null && !accountHealth.ok;
+    const standxRestUnhealthy =
+      this.standxRestUnhealthy && this.standxRestConsecutiveErrors >= STANDX_REST_ERROR_DEFENSE_THRESHOLD;
+
+    const shouldDefend = standxDepthStale || binanceStale || standxAccountStale || accountInvalid || standxRestUnhealthy;
 
     if (shouldDefend && !this.defenseMode) {
       // 进入防御模式
       this.enterDefenseMode({
         standxDepthStale,
         binanceStale,
-        standxDepthAge: now - this.lastStandxDepthTime,
-        binanceAge: now - this.lastBinanceDepthTime,
+        standxAccountStale,
+        accountInvalid,
+        standxRestUnhealthy,
+        standxRestConsecutiveErrors: this.standxRestConsecutiveErrors,
+        standxRestLastError: this.standxRestLastError,
+        standxDepthAge: this.lastStandxDepthTime > 0 ? now - this.lastStandxDepthTime : 0,
+        binanceAge: this.lastBinanceDepthTime > 0 ? now - this.lastBinanceDepthTime : 0,
+        standxAccountAge: this.lastStandxAccountTime > 0 ? now - this.lastStandxAccountTime : 0,
+        accountIssues: accountInvalid ? accountHealth.issues : [],
       });
     } else if (!shouldDefend && this.defenseMode) {
       // 退出防御模式
@@ -1565,8 +1625,15 @@ export class MakerPointsEngine {
   private enterDefenseMode(staleInfo: {
     standxDepthStale: boolean;
     binanceStale: boolean;
+    standxAccountStale: boolean;
+    accountInvalid: boolean;
+    standxRestUnhealthy: boolean;
+    standxRestConsecutiveErrors: number;
+    standxRestLastError: string | null;
     standxDepthAge: number;
     binanceAge: number;
+    standxAccountAge: number;
+    accountIssues: string[];
   }): void {
     this.defenseMode = true;
 
@@ -1575,6 +1642,15 @@ export class MakerPointsEngine {
     if (staleInfo.standxDepthStale) {
       staleItems.push(`StandX深度(${Math.round(staleInfo.standxDepthAge / 1000)}s)`);
     }
+    if (staleInfo.standxAccountStale) {
+      staleItems.push(`StandX账户(${Math.round(staleInfo.standxAccountAge / 1000)}s)`);
+    }
+    if (staleInfo.accountInvalid) {
+      staleItems.push(`StandX仓位数据异常(${staleInfo.accountIssues.join(",") || "unknown"})`);
+    }
+    if (staleInfo.standxRestUnhealthy) {
+      staleItems.push(`StandX REST错误(${staleInfo.standxRestConsecutiveErrors}次)`);
+    }
     if (staleInfo.binanceStale) {
       staleItems.push(`Binance深度(${Math.round(staleInfo.binanceAge / 1000)}s)`);
     }
@@ -1675,13 +1751,47 @@ export class MakerPointsEngine {
       if (!this.defenseRestPollActive || !this.defenseMode) return;
 
       try {
-        // 如果有查询挂单的方法，定期检查并取消
+        if (this.exchange.queryAccountSnapshot) {
+          const nextAccount = await this.exchange.queryAccountSnapshot();
+          if (nextAccount) {
+            this.accountSnapshot = nextAccount;
+            this.lastStandxAccountTime = Date.now();
+            this.feedStatus.account = true;
+            const health = validateAccountSnapshotForSymbol(nextAccount, this.config.symbol);
+            if (!health.ok) {
+              this.tradeLog.push("warn", `防御模式: 仓位数据仍异常: ${health.issues.join(",")}`);
+            }
+          } else {
+            this.tradeLog.push("warn", "防御模式: REST 获取账户快照为空");
+          }
+        }
+
+        // 防御模式下持续通过 REST 刷新挂单，并尽力撤销所有挂单（避免本地状态/WS 丢失导致遗留挂单）
         if (this.exchange.queryOpenOrders) {
-          const realOrders = await this.exchange.queryOpenOrders();
-          if (realOrders.length > 0) {
-            this.tradeLog.push("warn", `防御模式: 发现 ${realOrders.length} 个挂单，执行取消`);
+          try {
+            const realOrders = await this.exchange.queryOpenOrders();
+            this.openOrders = Array.isArray(realOrders)
+              ? realOrders.filter(
+                  (order) =>
+                    order.type !== "MARKET" &&
+                    order.symbol === this.config.symbol &&
+                    isOrderActiveStatus(order.status)
+                )
+              : [];
+            this.pendingCancelOrders.clear();
+            this.feedStatus.orders = true;
+
+            if (realOrders.length > 0) {
+              this.tradeLog.push("warn", `防御模式: 发现 ${realOrders.length} 个挂单，执行取消`);
+              await this.defenseCancelAllOrders();
+            }
+          } catch (error) {
+            this.tradeLog.push("error", `防御模式查询挂单失败: ${extractMessage(error)}`);
+            // 查询失败时仍然尝试撤销所有挂单（宁可多撤，也不遗留）
             await this.defenseCancelAllOrders();
           }
+        } else {
+          await this.defenseCancelAllOrders();
         }
 
         // 检查止损条件（使用当前账户快照中的数据）

src/utils/pnl.ts

@@ -13,4 +13,24 @@ export function computePositionPnl(
     : (position.entryPrice - (priceForPnl as number)) * absAmt;
 }
 
+export function computeStopLossPnl(
+  position: PositionSnapshot,
+  bestBid?: number | null,
+  bestAsk?: number | null
+): number | null {
+  const absAmt = Math.abs(position.positionAmt);
+  if (!Number.isFinite(absAmt) || absAmt <= 0) return 0;
+
+  // If entry price is missing, prefer the exchange-provided unrealized PnL.
+  if (!Number.isFinite(position.entryPrice) || position.entryPrice <= 0) {
+    return Number.isFinite(position.unrealizedProfit) ? position.unrealizedProfit : null;
+  }
+
+  const priceForPnl = position.positionAmt > 0 ? bestBid : bestAsk;
+  if (!Number.isFinite(priceForPnl as number) || (priceForPnl as number) <= 0) {
+    return Number.isFinite(position.unrealizedProfit) ? position.unrealizedProfit : null;
+  }
+
+  return computePositionPnl(position, bestBid, bestAsk);
+}
 

src/utils/strategy.ts

@@ -47,6 +47,47 @@ export function getPosition(snapshot: AsterAccountSnapshot | null, symbol: strin
   };
 }
 
+export function validateAccountSnapshotForSymbol(
+  snapshot: AsterAccountSnapshot | null,
+  symbol: string
+): { ok: true } | { ok: false; issues: string[] } {
+  if (!snapshot) return { ok: true };
+  const positions = snapshot.positions?.filter((p) => p.symbol === symbol) ?? [];
+  if (positions.length === 0) return { ok: true };
+
+  const NON_ZERO_EPS = 1e-8;
+  const issues: string[] = [];
+
+  for (const position of positions) {
+    const amt = Number(position.positionAmt);
+    if (!Number.isFinite(amt)) {
+      issues.push("invalid_positionAmt");
+      continue;
+    }
+    if (Math.abs(amt) <= NON_ZERO_EPS) {
+      continue;
+    }
+
+    const entryPrice = Number(position.entryPrice);
+    if (!Number.isFinite(entryPrice) || entryPrice <= 0) {
+      issues.push("invalid_entryPrice");
+    }
+
+    const unrealizedProfit = Number(position.unrealizedProfit);
+    if (!Number.isFinite(unrealizedProfit)) {
+      issues.push("invalid_unrealizedProfit");
+    }
+
+    const rawMark = Number(position.markPrice);
+    if (position.markPrice != null && position.markPrice !== "" && (!Number.isFinite(rawMark) || rawMark <= 0)) {
+      issues.push("invalid_markPrice");
+    }
+  }
+
+  if (issues.length === 0) return { ok: true };
+  return { ok: false, issues: Array.from(new Set(issues)) };
+}
+
 export function getSMA(values: AsterKline[], length: number): number | null {
   if (!Array.isArray(values) || values.length < length) return null;
   const window = values.slice(-length);