How can I access TradeStation's WebAPI from Mathematica 10? I want to access TradeStation's real-time datafeed from Mathematica 10. Does anyone know how to do this?
If you aren't familiar with how to use WebAPIs, you may want to start with some simple APIs to get an understanding of how they work. The way you use them is basically the same in any programming language.
In Mathematica, you'll want to use the URLExecute function:
There are examples on that page of how it can be used with other APIs.