Hi all, If I want to track 500+ stocks simultaneously and in real time, with 1 second tick data as well as market depth data for each stock, Is it feasible at all using TWS API programming? Has anybody tried some sort of "high frequency" programming on InteractiveBroker's account? How's the speed/performance? What are the technical/physical restrictions? Any other brokers that are better than IB in terms of high frequency data monitoring and/or trading? What's the best open source Java real-time tick level trading platform out there? I have decent experience with C++ and now turning to Java because I haven't seen much good C++ open source trading platform out there. I would like to identify the best Java open source real-time tick data level trading platform currently available, with an active body of developers and I would like to contribute to the development of high frequency trading platform. Thanks!