They make their money from trades. The more they can get people to trade, the more money they make. It's definitely their cup of tea. I have been with TD Ameritrade since it was "Waterhouse Securities" about 25 years ago. They have always been one of the first to accept new technologies while maintaining the old as well. That is why you can still "call your broker" or walk into one of their local offices and talk to someone in person if you want to. At the same time, as a business their goal is to make their company more appealing than their competitors, and the more innovative they can be, the more appealing they will be to prospective customers ("clients").
I know how they make revenue, thanks... I meant that developing tools like this does not seem to be something Scottrade really shoots for.