I've built a number of profitable trading strategies using Excel and would like to find a much easier and robust means by which to test additional trading strategies and eventually trade them automatically. TradeStation seems to have what I'm looking for both in terms of backtesting, "customizability", and eventual automated trading. I've had a few "this seems too good to be true" thoughts.... Can their platform easily trade multiple strategies across multiple markets within seperate portfolios? Are there any Hedge Fund Managers out there in the membership using this service? Likes, dislikes, alternatives?