I myself actually only use the streetbet hotkey, and the mousewheel betting , where the streetbets can autofire off course, but the mousewheel part would need some kind of extra trigger I guess.
To make it more difficult, I think the best generic solution would be some kind of autobetting and semi-autobetting, where autobetting means firing right away, and semi-autobetting would need an extra trigger.
In that way, the user itself can choose to have the street/fixed/percentage betting being fired automaticly, or the same, but then with the need of clicking an extra button..
Just my thoughts