Rodney, Agree that TDA bought TOS, but they had separate autotrading tools. TDA has the former Stock Watch Pro, while TOS has Prodigio. And I think they still have separate trading software platforms. TDA tool is not very intuitive or robust, but their support staff is helpful. Seems to work well with basic strategies.
Not sure if Tradelink was brought up yet but I just started taking a look at it and my initial reaction is very positive. Very easy to write to, easy to work with, good support, etc. I am not affiliated with Tradelink, just like the product.