> For the complete documentation index, see [llms.txt](https://docs.ndax.in/v3/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ndax.in/v3/fix.md).

# FIX

**What is FIX?**

FIX (Financial Information eXchange) is a standard protocol which can be used to enter orders, submit cancel requests, and receive fills. FIX API users typically have existing software that runs FIX for order management. Users who are not familiar with FIX should consider using the REST API.