Quote from whitster:
before you ask for features in booktrader, check to see if they already exist
There's not all that much documentation on the full capabilities of booktrader. Perhaps the upcoming webinar about it will discuss it. It's more powerful than IB lets on. It can actually hold its own against some of the 3rd party API apps. At least fundamentally.
I didn't seriously consider it after reading the TWS manual and instead thought of buying Bracket Trader or Zero line. Turns out, IB's booktrader has all I need.