Hi, I want to write a program to do live trading using IB Api, on their website I learn that I must intall and run IB gateway in order to use IB Api, which I think is not so convenient and cost more memory and computing resources. Can anyone be good enough to tell me if there is other way to use IB Api without dependence on IB gateway? Or how quantopian communicate with interactivebrokers, are you using IB Api too? Thanks a lot in advance.