diff --git a/docs/guides/faq.en.md b/docs/guides/faq.en.md
index 7b31142d..80fc0dad 100644
--- a/docs/guides/faq.en.md
+++ b/docs/guides/faq.en.md
@@ -1,25 +1,205 @@
-# Frequently Asked Questions
+# Frequently Asked Questions (FAQ)
 
-## Binance Position Mode Error (code=-4061)
-
-**Error Message**: `Order's position side does not match user's setting`
-
-**Cause**: The system requires Hedge Mode (dual position), but your Binance account is set to One-way Mode.
-
-### Solution
-
-1. Login to [Binance Futures Trading Platform](https://www.binance.com/en/futures/BTCUSDT)
-
-2. Click **⚙️ Preferences** in the top right corner
-
-3. Select **Position Mode**
-
-4. Switch to **Hedge Mode** (Dual Position)
-
-5. Confirm the change
-
-**Note**: You must close all open positions before switching modes.
+Quick answers to common questions. For detailed troubleshooting, see [Troubleshooting Guide](TROUBLESHOOTING.md).
 
 ---
 
-For more issues, check [GitHub Issues](https://github.com/tinkle-community/nofx/issues)
+## General Questions
+
+### What is NOFX?
+NOFX is an AI-powered cryptocurrency trading bot that uses large language models (LLMs) to make trading decisions on futures markets.
+
+### Which exchanges are supported?
+- ✅ Binance Futures
+- ✅ Hyperliquid
+- 🚧 More exchanges coming soon
+
+### Is NOFX profitable?
+AI trading is **experimental** and **not guaranteed** to be profitable. Always start with small amounts and never invest more than you can afford to lose.
+
+### Can I run multiple traders simultaneously?
+Yes! NOFX supports running multiple traders with different configurations, AI models, and trading strategies.
+
+---
+
+## Setup & Configuration
+
+### What are the system requirements?
+- **OS**: Linux, macOS, or Windows (Docker recommended)
+- **RAM**: 2GB minimum, 4GB recommended
+- **Disk**: 1GB for application + logs
+- **Network**: Stable internet connection
+
+### Do I need coding experience?
+No! NOFX has a web UI for all configuration. However, basic command line knowledge helps with setup and troubleshooting.
+
+### How do I get API keys?
+1. **Binance**: Account → API Management → Create API → Enable Futures
+2. **Hyperliquid**: Visit [Hyperliquid App](https://app.hyperliquid.xyz/) → API Settings
+
+### Should I use a subaccount?
+**Recommended**: Yes, use a subaccount dedicated to NOFX for better risk isolation. However, note that some subaccounts have restrictions (e.g., 5x max leverage on Binance).
+
+---
+
+## Trading Questions
+
+### Why isn't my trader making any trades?
+Common reasons:
+- AI decided to "wait" due to market conditions
+- Insufficient balance or margin
+- Position limits reached (default: max 3 positions)
+- See detailed diagnostics in [Troubleshooting Guide](TROUBLESHOOTING.md#-ai-always-says-wait--hold)
+
+### How often does the AI make decisions?
+Configurable! Default is every **3-5 minutes**. Too frequent = overtrading, too slow = missed opportunities.
+
+### Can I customize the trading strategy?
+Yes! You can:
+- Adjust leverage settings
+- Modify coin selection pool
+- Change decision intervals
+- Customize system prompts (advanced)
+
+### What's the maximum number of concurrent positions?
+Default: **3 positions**. This is a soft limit defined in the AI prompt, not hard-coded. See `decision/engine.go:266`.
+
+---
+
+## Technical Issues
+
+### Binance Position Mode Error (code=-4061)
+
+**Error**: `Order's position side does not match user's setting`
+
+**Solution**: Switch to **Hedge Mode** (双向持仓)
+1. Login to [Binance Futures](https://www.binance.com/en/futures/BTCUSDT)
+2. Click **⚙️ Preferences** (top right)
+3. Select **Position Mode** → **Hedge Mode**
+4. ⚠️ Close all positions first
+
+**Why**: NOFX uses `PositionSide(LONG/SHORT)` which requires Hedge Mode.
+
+See [Issue #202](https://github.com/tinkle-community/nofx/issues/202) and [Troubleshooting Guide](TROUBLESHOOTING.md#-only-opening-short-positions-issue-202).
+
+---
+
+### Backend won't start / Port already in use
+
+**Solution**:
+```bash
+# Check what's using port 8080
+lsof -i :8080
+
+# Change port in .env
+NOFX_BACKEND_PORT=8081
+```
+
+---
+
+### Frontend shows "Loading..." forever
+
+**Quick Check**:
+```bash
+# Is backend running?
+curl http://localhost:8080/api/health
+
+# Should return: {"status":"ok"}
+```
+
+If not, check [Troubleshooting Guide](TROUBLESHOOTING.md#-frontend-cant-connect-to-backend).
+
+---
+
+### Database locked error
+
+**Solution**:
+```bash
+# Stop all NOFX processes
+docker compose down
+# OR
+pkill nofx
+
+# Restart
+docker compose up -d
+```
+
+---
+
+## AI & Model Questions
+
+### Which AI models are supported?
+- DeepSeek (recommended for cost/performance)
+- OpenAI GPT-4
+- Claude (Anthropic)
+- Custom models via API
+
+### How much do API calls cost?
+Depends on your model and decision frequency:
+- **DeepSeek**: ~$0.10-0.50 per day (1 trader, 5min intervals)
+- **GPT-4**: ~$2-5 per day
+- **Claude**: ~$1-3 per day
+
+### Can I use multiple AI models?
+Yes! Each trader can use a different AI model. You can even A/B test different models.
+
+### Does the AI learn from its mistakes?
+Yes, to some extent. NOFX provides historical performance feedback in each decision prompt, allowing the AI to adjust its strategy.
+
+---
+
+## Data & Privacy
+
+### Where is my data stored?
+All data is stored **locally** on your machine in SQLite databases:
+- `config.db` - Trader configurations
+- `trading.db` - Trade history
+- `decision_logs/` - AI decision records
+
+### Is my API key secure?
+API keys are stored in local databases. Never share your databases or `.env` files. We recommend using API keys with IP whitelist restrictions.
+
+### Can I export my trading history?
+Yes! Trading data is in SQLite format. You can query it directly:
+```bash
+sqlite3 trading.db "SELECT * FROM trades;"
+```
+
+---
+
+## Troubleshooting
+
+### Where can I find detailed troubleshooting?
+See the comprehensive [Troubleshooting Guide](TROUBLESHOOTING.md) for:
+- Step-by-step diagnostics
+- Log collection methods
+- Common error solutions
+- Emergency reset procedures
+
+### How do I report a bug?
+1. Check [Troubleshooting Guide](TROUBLESHOOTING.md) first
+2. Search [existing issues](https://github.com/tinkle-community/nofx/issues)
+3. If not found, use our [Bug Report Template](../../.github/ISSUE_TEMPLATE/bug_report.md)
+
+### Where can I get help?
+- [GitHub Discussions](https://github.com/tinkle-community/nofx/discussions)
+- [Telegram Community](https://t.me/nofx_dev_community)
+- [GitHub Issues](https://github.com/tinkle-community/nofx/issues)
+
+---
+
+## Contributing
+
+### Can I contribute to NOFX?
+Yes! We welcome contributions:
+- Bug fixes and features
+- Documentation improvements
+- Translations
+- See [Contributing Guide](../CONTRIBUTING.md)
+
+### How do I suggest new features?
+Open a [Feature Request](https://github.com/tinkle-community/nofx/issues/new/choose) with your idea!
+
+---
+
+**Last Updated:** 2025-11-02
diff --git a/docs/guides/faq.zh-CN.md b/docs/guides/faq.zh-CN.md
index 5d823205..0f9cc69a 100644
--- a/docs/guides/faq.zh-CN.md
+++ b/docs/guides/faq.zh-CN.md
@@ -1,25 +1,205 @@
-# 常见问题
+# 常见问题（FAQ）
 
-## 币安持仓模式错误 (code=-4061)
-
-**错误信息**：`Order's position side does not match user's setting`
-
-**原因**：系统需要使用双向持仓模式，但您的币安账户设置为单向持仓。
-
-### 解决方法
-
-1. 登录 [币安合约交易平台](https://www.binance.com/zh-CN/futures/BTCUSDT)
-
-2. 点击右上角的 **⚙️ 偏好设置**
-
-3. 选择 **持仓模式**
-
-4. 切换为 **双向持仓** (Hedge Mode)
-
-5. 确认切换
-
-**注意**：切换前必须先平掉所有持仓。
+快速解答常见问题。详细故障排查请参考[故障排查指南](TROUBLESHOOTING.zh-CN.md)。
 
 ---
 
-更多问题请查看 [GitHub Issues](https://github.com/tinkle-community/nofx/issues)
+## 基础问题
+
+### NOFX 是什么？
+NOFX 是一个 AI 驱动的加密货币交易机器人，使用大语言模型（LLM）在期货市场进行交易决策。
+
+### 支持哪些交易所？
+- ✅ 币安合约（Binance Futures）
+- ✅ Hyperliquid
+- 🚧 更多交易所开发中
+
+### NOFX 能盈利吗？
+AI 交易是**实验性**的，**不保证盈利**。请始终用小额资金测试，不要投入超过您承受能力的资金。
+
+### 可以同时运行多个交易员吗？
+可以！NOFX 支持运行多个交易员，每个可配置不同的 AI 模型和交易策略。
+
+---
+
+## 安装与配置
+
+### 系统要求是什么？
+- **操作系统**：Linux、macOS 或 Windows（推荐 Docker）
+- **内存**：最低 2GB，推荐 4GB
+- **硬盘**：应用 + 日志需要 1GB
+- **网络**：稳定的互联网连接
+
+### 需要编程经验吗？
+不需要！NOFX 有 Web 界面进行所有配置。但基础的命令行知识有助于安装和故障排查。
+
+### 如何获取 API 密钥？
+1. **币安**：账户 → API 管理 → 创建 API → 启用合约
+2. **Hyperliquid**：访问 [Hyperliquid App](https://app.hyperliquid.xyz/) → API 设置
+
+### 应该使用子账户吗？
+**推荐**：是的，使用专门的子账户运行 NOFX 可以更好地隔离风险。但请注意，某些子账户有限制（例如币安子账户最高 5 倍杠杆）。
+
+---
+
+## 交易问题
+
+### 为什么我的交易员不开仓？
+常见原因：
+- AI 根据市场情况决定"等待"
+- 余额或保证金不足
+- 达到持仓上限（默认最多 3 个仓位）
+- 详细诊断请查看[故障排查指南](TROUBLESHOOTING.zh-CN.md#-ai-总是说等待持有)
+
+### AI 多久做一次决策？
+可配置！默认是每 **3-5 分钟**。太频繁 = 过度交易，太慢 = 错过机会。
+
+### 可以自定义交易策略吗？
+可以！您可以：
+- 调整杠杆设置
+- 修改币种选择池
+- 更改决策间隔
+- 自定义系统提示词（高级）
+
+### 最多可以同时持有多少个仓位？
+默认：**3 个仓位**。这是 AI 提示词中的软限制，不是硬编码。参见 `decision/engine.go:266`。
+
+---
+
+## 技术问题
+
+### 币安持仓模式错误 (code=-4061)
+
+**错误信息**：`Order's position side does not match user's setting`
+
+**解决方法**：切换为**双向持仓**模式
+1. 登录[币安合约](https://www.binance.com/zh-CN/futures/BTCUSDT)
+2. 点击右上角 **⚙️ 偏好设置**
+3. 选择 **持仓模式** → **双向持仓**
+4. ⚠️ 先平掉所有持仓
+
+**原因**：NOFX 使用 `PositionSide(LONG/SHORT)`，需要双向持仓模式。
+
+参见 [Issue #202](https://github.com/tinkle-community/nofx/issues/202) 和[故障排查指南](TROUBLESHOOTING.zh-CN.md#-只开空单-issue-202)。
+
+---
+
+### 后端无法启动 / 端口被占用
+
+**解决方法**：
+```bash
+# 查看占用端口的进程
+lsof -i :8080
+
+# 修改 .env 中的端口
+NOFX_BACKEND_PORT=8081
+```
+
+---
+
+### 前端一直显示"加载中..."
+
+**快速检查**：
+```bash
+# 后端是否运行？
+curl http://localhost:8080/api/health
+
+# 应该返回：{"status":"ok"}
+```
+
+如果不是，查看[故障排查指南](TROUBLESHOOTING.zh-CN.md#-前端无法连接后端)。
+
+---
+
+### 数据库锁定错误
+
+**解决方法**：
+```bash
+# 停止所有 NOFX 进程
+docker compose down
+# 或
+pkill nofx
+
+# 重启
+docker compose up -d
+```
+
+---
+
+## AI 与模型问题
+
+### 支持哪些 AI 模型？
+- DeepSeek（推荐性价比）
+- OpenAI GPT-4
+- Claude（Anthropic）
+- 通过 API 的自定义模型
+
+### API 调用成本是多少？
+取决于您的模型和决策频率：
+- **DeepSeek**：每天约 $0.10-0.50（1 个交易员，5 分钟间隔）
+- **GPT-4**：每天约 $2-5
+- **Claude**：每天约 $1-3
+
+### 可以使用多个 AI 模型吗？
+可以！每个交易员可以使用不同的 AI 模型。您甚至可以 A/B 测试不同模型。
+
+### AI 会从错误中学习吗？
+会的，在一定程度上。NOFX 在每次决策提示中提供历史表现反馈，允许 AI 调整策略。
+
+---
+
+## 数据与隐私
+
+### 我的数据存储在哪里？
+所有数据都**本地存储**在您的机器上，使用 SQLite 数据库：
+- `config.db` - 交易员配置
+- `trading.db` - 交易历史
+- `decision_logs/` - AI 决策记录
+
+### API 密钥安全吗？
+API 密钥存储在本地数据库中。永远不要分享您的数据库或 `.env` 文件。我们建议使用带 IP 白名单限制的 API 密钥。
+
+### 可以导出交易历史吗？
+可以！交易数据是 SQLite 格式。您可以直接查询：
+```bash
+sqlite3 trading.db "SELECT * FROM trades;"
+```
+
+---
+
+## 故障排查
+
+### 在哪里可以找到详细的故障排查？
+查看全面的[故障排查指南](TROUBLESHOOTING.zh-CN.md)，包含：
+- 分步诊断方法
+- 日志收集方法
+- 常见错误解决方案
+- 紧急重置步骤
+
+### 如何报告 Bug？
+1. 先查看[故障排查指南](TROUBLESHOOTING.zh-CN.md)
+2. 搜索[现有 Issues](https://github.com/tinkle-community/nofx/issues)
+3. 如果没找到，使用我们的 [Bug 报告模板](../../.github/ISSUE_TEMPLATE/bug_report.md)
+
+### 在哪里可以获得帮助？
+- [GitHub Discussions](https://github.com/tinkle-community/nofx/discussions)
+- [Telegram 社区](https://t.me/nofx_dev_community)
+- [GitHub Issues](https://github.com/tinkle-community/nofx/issues)
+
+---
+
+## 贡献
+
+### 可以为 NOFX 贡献代码吗？
+可以！我们欢迎贡献：
+- Bug 修复和新功能
+- 文档改进
+- 翻译
+- 查看[贡献指南](../CONTRIBUTING.md)
+
+### 如何建议新功能？
+提交 [Feature Request](https://github.com/tinkle-community/nofx/issues/new/choose) 说明您的想法！
+
+---
+
+**最后更新：** 2025-11-02