Initial commit: Trading skills collection

- OKX交易自动化 (okx-auto-position, okx-crypto, okx-exchange)
- 交易信号处理 (signal-confirmation-templates, trading-signal-aggregator)
- 量化因子挖掘 (quant-factor-mining)
- 长桥集成 (longbridge-cli, longbridge-python-sdk)
- 六合彩分析 (lottery-hk)
- 股息投资 (dividend-investing, dividend-scanner)
- 日内交易 (intraday-trading)
- 同花顺 (tonghuashun)

longbridge-python-sdk/references/broker-sdk-comparison.md

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+# Chinese/Asian Broker SDK Comparison
+
+## LongPort (长桥) vs Snowball Securities (雪盈)
+
+| Feature | LongPort (`longbridge`) | Snowball (`snbpy`) |
+|---|---|---|
+| **CLI Tool** | ✅ `longport-cli` | ❌ None |
+| **Python SDK** | ✅ `longbridge` (PyPI) | ✅ `snbpy` (PyPI) |
+| **Java SDK** | ✅ | ✅ |
+| **Market Data API** | ✅ Realtime, K-lines, depth, options chain | ❌ No market data |
+| **Trading API** | ✅ Full (limit/market/stop/trailing) | ✅ 10 APIs |
+| **Watchlist API** | ✅ | ❌ |
+| **Fundamentals** | ✅ PE/PB/EPS/BPS/dividend yield | ❌ |
+| **Capital Flow** | ✅ | ❌ |
+| **Active Maintenance** | ✅ Regular updates | ⚠️ Last updated ~2021 |
+| **Market Coverage** | HK, US, CN, SG | HK, US (+ forex, futures, options, bonds) |
+| **GitHub Stars** | ~hundreds | 35 |
+
+## Snowball Securities (`snbpy`) Details
+
+### Install
+```bash
+pip install snbpy
+```
+
+### 10 Core APIs
+| Method | Description |
+|---|---|
+| `login` | Get auth token |
+| `get_token_status` | Check token expiry |
+| `place_order` | Submit order |
+| `cancel_order` | Cancel order |
+| `get_order_by_id` | Query single order |
+| `get_order_list` | Query all orders |
+| `get_position_list` | Query holdings |
+| `get_balance` | Query account balance |
+| `get_security_detail` | Security info |
+| `get_transaction_list` | Query trade history |
+
+### Supported Order Types
+Limit, Market, Stop, Stop Limit, Trailing, Market-on-Open, Limit-on-Open, Market-on-Close, Limit-on-Close
+
+### Supported Asset Types
+Stocks (STK), Futures (FUT), Options (OPT), Warrants (WAR), CFDs, Forex (CASH), Bonds, Funds, CBBCs (IOPT)
+
+### Configuration
+```python
+from snbpy.common.domain.snb_config import SnbConfig
+from snbpy.snb_api_client import SnbHttpClient
+
+config = SnbConfig()
+config.account = "DU876752"  # Your account ID
+config.key = 'your_secret_key'
+config.snb_server = 'openapi.snbsecurities.com'  # prod
+config.snb_port = '443'
+config.schema = 'https'
+config.timeout = 1000
+
+client = SnbHttpClient(config)
+client.login()
+```
+
+### Environments
+| Env | URL | Account |
+|---|---|---|
+| SIT (test) | sandbox.snbsecurities.com | Contact support |
+| PROD (real) | openapi.snbsecurities.com | Self-register on website |
+
+### Key Limitations
+- **No market data** — cannot get quotes, K-lines, or depth
+- **No CLI** — Python/Java SDK only
+- **Stale** — last PyPI release ~2021, no recent commits
+- **Token limit** — server keeps max 10 tokens per user
+
+### GitHub
+https://github.com/snowballsecurities/snbpy (35 stars, MIT license)
+
+### Docs
+https://snowballsecurities.github.io/
+
+## When to Use Which
+- **LongPort**: Primary choice for everything — data, trading, analysis
+- **Snowball**: Only if you have a Snowball account and want to automate trades there. Use LongPort for all market data regardless.