This goes exactly against the point I'm making. Those strategies are not a bottom up system that combines a tailored infrastructure with sophisticated trading

This goes exactly against the point I'm making. Those strategies are not a bottom up system that combines a tailored infrastructure with sophisticated trading models. BOTH are needed, TradeStation is absolutely NOT a sophisticated infrastructure. And I doubt that the models are sophisticated enough to rake in alpha, especially in terms of execution. Maybe if you put in a little money you'll break even with the subscription cost. If you put in a lot, those systems will break down.