The release notes for TradeStation 8.1 say that you can execute orders via FIX through the TradeStation order network. I look for the documentation on this, and I can't find anything. Is anyone out there interfacing to the order network via FIX? All it says is that you can now use third party order-management-systems. Can I legitimately do cancel-replace over this FIX connection? I am constantly fighting limitations in retail platforms and have most of my stuff ported into custom C++ now. It would be nice if I could use the TS front-end as a monitor for what's going on while a FIX-based connection is used for order management.