I just got a heads up from a buddy in the form of a forwarded copy of the John Lothian Newsletter. In it is revealed that TT has been given a patent for the concept of the price ladder DOM for placing orders. The suggestion is that anyone using this concept (ninja, buttontrader, trademave, booktrader, etc etc) is breaking the patent. Anyone have knowledge of what this will really mean? It's getting pathetic that you can patent a vertical row of numbers.