What brokers allow trading both equities, futures, and options from the same API? So far I'm aware of Interactive Brokers, ThinkorSwim, and Vision Financial. Are there any others that are available to the retail trader?
depending on the executing broker, some sterling brokers allow that. also knight i believe supports all three.
Just FYI: the Vision solution is a white label version of Rithmics product. You can contact them directly to find the FCMs they support.
I should add that I've since learned that Vision, while it offers access to equities, futures, and options, does not use the same API for all of them. There are separate apis for equities and futures.