Greetings, i am used to trade via Active Trader / Book Trader in TWS and TOS. https://www.interactivebrokers.com/en/index.php?f=771 https://tlc.thinkorswim.com/center/howToTos/thinkManual/Trade/Active-Trader Basically you can click on the ladder and give orders. But is this possible in Dastrader, Sterlingtrader or RealTick® EMS? L2 Book can be converted to the ladder view but i can't click on the ask or buy rows to give orders. And what do you thinka bout Dastrader, Sterlintrader and RealTick? Which one is the fastest?