Integration options
TradeRule should stay API-first and prefer broker integrations over screen-based capture.
Market data candidates
| Provider | Coverage | Transport | Stage | Notes |
|---|---|---|---|---|
| Webull Market Data API | US stocks, futures, crypto, real-time and historical data | HTTP plus MQTT | Current | Best fit for starting quickly when the trading account already lives inside Webull. |
| Polygon.io | Broad equities and options coverage | REST plus WebSocket | Research | Strong ecosystem option if execution stays with one broker but analytics need independent data feeds. |
| Alpaca Market Data | Stocks, options, crypto | REST plus streaming | Research | Useful benchmark for pricing and quote coverage if Webull data terms are restrictive. |
Current recommendation
Keep ingestion centered on Webull's trading and market-data APIs. Future platform support should extend direct broker integrations rather than introducing screen-derived trade capture.