[timokrates]

Thanks a lot everybody.

I tested most of the platforms and have to say that the Infinity order window is great.

Also Ninjatrader is attractive in a way. The Zen data feed is very fast, but I had some problems with the platform in regards to crashes and software problems.
Soultrader you mentioned somewhere that you think about using NT?

What I need is a professional platform and service. I will check Infinity again.

Any experiences with X-Trader? I believe with Velocity Futures it's affordable. You pay higher commissions ($5.75), but then it's free.

What I need is reliability specially in regards to the data, because I plan to base my trades more on time & sales. For that the Interactive Brokers feed is not the right one for example.