Hi there Susie
I'm using 2 platforms, X_Trader by Trading Technologies, and NinjaTrader.
I'm leaning more towards the NinjaTrader platform as it is much less expensive, it is pre-programmable, that is stops and targets can be programmed into it.... and its FAST!!!! I think it's even faster than X_Trader now if you have the Zen-Fire engine in it.
Rob