The last post on this subject was in March 2003 IB has changed a lot now. Is scalping easier now on IB?
They introduced the Book Trader (which is basically a DOM Window), but I find it of limited use since the most important aspect (at least for my style of trading) has been left out: the possibility to create Trading Strategies where you can place a buy/sell order with multiple Stop Profit & Stop Loss orders with one single mouseclick. I still have to use Ninja Trader to do that....