a.) Are there any websites, tools, etc. that are platforms for testing stock trading applications? b.) Are there any platforms apis etc that allow automated trading?
Any thoughts?
Also, i particularly like coding in python.
RTS Realtime Systems is a well-known trading platform. It is written in Java, though.
When you are searching for testing tools, try to search for the term backtesting and algorithmic trading. I came up with this result: PyAlgoTrader