diff --git a/README.md b/README.md
index e28c05a..93dfa99 100644
--- a/README.md
+++ b/README.md
@@ -72,6 +72,12 @@ curl -fsSL https://github.com/discountry/ritmex-bot/raw/refs/heads/main/setup.sh
 
 切换到 GRVT 时，将 `EXCHANGE=grvt` 并补齐 `GRVT_API_KEY`、`GRVT_API_SECRET`、`GRVT_SUB_ACCOUNT_ID` 等变量；详情见 `.env.example`。
 
+> 提示：你也可以通过命令行参数临时指定交易所（优先级高于环境变量）：
+> ```bash
+> bun run index.ts --exchange grvt
+> bun run index.ts -e lighter
+> ```
+
 ## 常用命令
 ```bash
 bun run index.ts   # 启动 CLI（默认）
@@ -90,6 +96,13 @@ bun run index.ts --strategy maker --silent        # 启动做市策略
 bun run index.ts --strategy offset-maker --silent # 启动偏移做市策略
 ```
 
+如需同时指定交易所，可叠加 `--exchange/-e`（将覆盖 `.env` 中的 `EXCHANGE`/`TRADE_EXCHANGE`）：
+
+```bash
+bun run index.ts --exchange grvt --strategy maker --silent
+bun run index.ts -e lighter -s offset-maker --silent
+```
+
 ### 项目内置脚本
 `package.json` 提供了便捷脚本：
 
diff --git a/README_en.md b/README_en.md
index 56e6d35..5d2c50f 100644
--- a/README_en.md
+++ b/README_en.md
@@ -69,6 +69,12 @@ The most important settings shipped in `.env.example` are summarised below:
 
 To trade on GRVT, set `EXCHANGE=grvt` and populate `GRVT_API_KEY`, `GRVT_API_SECRET`, `GRVT_SUB_ACCOUNT_ID`, plus any optional overrides documented in `.env.example`.
 
+> Tip: you can temporarily override the exchange via CLI flags (takes precedence over environment):
+> ```bash
+> bun run index.ts --exchange grvt
+> bun run index.ts -e lighter
+> ```
+
 ## Common Commands
 ```bash
 bun run index.ts   # Launch the CLI
@@ -87,6 +93,13 @@ bun run index.ts --strategy maker --silent        # Maker engine
 bun run index.ts --strategy offset-maker --silent # Offset maker engine
 ```
 
+Combine with `--exchange/-e` to explicitly choose the venue (overrides `EXCHANGE`/`TRADE_EXCHANGE` from `.env`):
+
+```bash
+bun run index.ts --exchange grvt --strategy maker --silent
+bun run index.ts -e lighter -s offset-maker --silent
+```
+
 ### Package scripts
 Convenience aliases are exposed in `package.json`:
 
diff --git a/src/cli/args.ts b/src/cli/args.ts
index 17347af..68685c3 100644
--- a/src/cli/args.ts
+++ b/src/cli/args.ts
@@ -4,6 +4,7 @@ export interface CliOptions {
   strategy?: StrategyId;
   silent: boolean;
   help: boolean;
+  exchange?: "aster" | "grvt" | "lighter";
 }
 
 const STRATEGY_VALUES = new Set<StrategyId>(["trend", "maker", "offset-maker"]);
@@ -36,6 +37,19 @@ export function parseCliArgs(argv: string[] = process.argv.slice(2)): CliOptions
       }
       continue;
     }
+    if (arg.startsWith("--exchange=")) {
+      const value = arg.split("=", 2)[1] ?? "";
+      assignExchange(options, value);
+      continue;
+    }
+    if (arg === "--exchange" || arg === "-e") {
+      const value = argv[i + 1];
+      if (value) {
+        assignExchange(options, value);
+        i += 1;
+      }
+      continue;
+    }
   }
 
   return options;
@@ -51,12 +65,23 @@ function assignStrategy(options: CliOptions, raw: string): void {
   }
 }
 
+function assignExchange(options: CliOptions, raw: string): void {
+  const normalized = raw.trim().toLowerCase();
+  if (!normalized) return;
+  if (normalized === "aster" || normalized === "grvt" || normalized === "lighter") {
+    options.exchange = normalized as CliOptions["exchange"];
+  } else if (normalized === "gravity" || normalized === "grav" || normalized === "grv") {
+    options.exchange = "grvt";
+  }
+}
+
 export function printCliHelp(): void {
   // eslint-disable-next-line no-console
-  console.log(`Usage: bun run index.ts [--strategy <trend|maker|offset-maker>] [--silent]\n\n` +
+  console.log(`Usage: bun run index.ts [--strategy <trend|maker|offset-maker>] [--exchange <aster|grvt|lighter>] [--silent]\n\n` +
     `Options:\n` +
     `  --strategy, -s    Automatically start the specified strategy without the interactive menu.\n` +
     `                    Aliases: offset, offset-maker for the offset maker engine.\n` +
+    `  --exchange, -e    Choose exchange. Overrides EXCHANGE/TRADE_EXCHANGE environment variables.\n` +
     `  --silent, -q      Reduce console output. When used with --strategy, runs in silent daemon mode.\n` +
     `  --help, -h        Show this help message.\n`);
 }
diff --git a/src/index.tsx b/src/index.tsx
index 84f3812..5f7dace 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -4,9 +4,17 @@ import { App } from "./ui/App";
 import { setupGlobalErrorHandlers } from "./runtime-errors";
 import { parseCliArgs, printCliHelp } from "./cli/args";
 import { startStrategy } from "./cli/strategy-runner";
+import { resolveExchangeId } from "./exchanges/create-adapter";
 
 setupGlobalErrorHandlers();
 const options = parseCliArgs();
+// If user specifies --exchange, override environment-based resolution for this process
+if (options.exchange) {
+  // Ensure downstream calls to resolveExchangeId() pick the CLI value.
+  // We set both common env keys respected by resolveExchangeId.
+  process.env.EXCHANGE = options.exchange;
+  process.env.TRADE_EXCHANGE = options.exchange;
+}
 
 if (options.help) {
   printCliHelp();
diff --git a/src/ui/App.tsx b/src/ui/App.tsx
index d969a76..11de91b 100644
--- a/src/ui/App.tsx
+++ b/src/ui/App.tsx
@@ -4,6 +4,7 @@ import { TrendApp } from "./TrendApp";
 import { MakerApp } from "./MakerApp";
 import { OffsetMakerApp } from "./OffsetMakerApp";
 import { loadCopyrightFragments, verifyCopyrightIntegrity } from "../utils/copyright";
+import { resolveExchangeId } from "../exchanges/create-adapter";
 
 interface StrategyOption {
   id: "trend" | "maker" | "offset-maker";
@@ -40,16 +41,23 @@ export function App() {
   const [selected, setSelected] = useState<StrategyOption | null>(null);
   const copyright = useMemo(() => loadCopyrightFragments(), []);
   const integrityOk = useMemo(() => verifyCopyrightIntegrity(), []);
+  const exchangeId = useMemo(() => resolveExchangeId(), []);
+  const strategies = useMemo(() => {
+    if (exchangeId === "lighter") {
+      return STRATEGIES.filter((s) => s.id !== "trend");
+    }
+    return STRATEGIES;
+  }, [exchangeId]);
 
   useInput(
     (input, key) => {
       if (selected) return;
       if (key.upArrow) {
-        setCursor((prev) => (prev - 1 + STRATEGIES.length) % STRATEGIES.length);
+        setCursor((prev) => (prev - 1 + strategies.length) % strategies.length);
       } else if (key.downArrow) {
-        setCursor((prev) => (prev + 1) % STRATEGIES.length);
+        setCursor((prev) => (prev + 1) % strategies.length);
       } else if (key.return) {
-        const strategy = STRATEGIES[cursor];
+        const strategy = strategies[cursor];
         if (strategy) {
           setSelected(strategy);
         }
@@ -75,7 +83,7 @@ export function App() {
       <Text color="cyanBright">请选择要运行的策略</Text>
       <Text color="gray">使用 ↑/↓ 选择，回车开始，Ctrl+C 退出。</Text>
       <Box flexDirection="column" marginTop={1}>
-        {STRATEGIES.map((strategy, index) => {
+        {strategies.map((strategy, index) => {
           const active = index === cursor;
           return (
             <Box key={strategy.id} flexDirection="column" marginBottom={1}>