> For the complete documentation index, see [llms.txt](https://hawkalpha.gitbook.io/what-is-hawkalpha/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hawkalpha.gitbook.io/what-is-hawkalpha/alpaca-broker.md).

# Alpaca Broker

- [Who is Alpaca?](https://hawkalpha.gitbook.io/what-is-hawkalpha/alpaca-broker/who-is-alpaca.md): Introduction to Alpaca, the API-friendly broker that HawkAlpha integrates with. Enjoy commission-free trading, paper account testing, solid market data, and 4x margin.
- [Market Data Subscription](https://hawkalpha.gitbook.io/what-is-hawkalpha/alpaca-broker/market-data-subscription.md): Learn the difference between SIP (paid) and IEX (free) data, how to change the data plan in Alpaca, etc.
- [Regarding Market Data Licensing](https://hawkalpha.gitbook.io/what-is-hawkalpha/alpaca-broker/regarding-market-data-licensing.md): Market data subscription licensing, how HawkAlpha utilizes it per users own VPS, and complying with the data providers’ terms of service.


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