I've got a quanitative trading model I want to test out in the real stock market. Right now, I'm writing some code to pull "live" quotes from yahoo, feed them to my model, and keep track of the trades my model makes. However, I feel like I'm re-investing the wheel. Sites like Investopedia have free stock trading "simulators" and I was wondering if there were any sites like this that also provide a free api. I'm primarily interesting in 3 things:
- Web service that I can interact with by GETing a url (i.e. www.site.com/?trade&id=1234&pw=abcd&action=BUY&shares=100)
- Supports placing orders
- Can return current positions
Or is this too much to ask for a free service?