Controller for tractor! Just like Twitch ?
First of all sorry for my bad english! I hope you understand me a bit. I’ll also keep it short
I currently use the Xone DX with Itch, but I would like to use tractor again and looking for the right hardware.
Is there such a thing as Twitch for Traktor? there are limitations when i using Twitch with Traktor ?
I do not need a four-deck controller or Jog Wheels 
You can use Traktor with Twitch and there will be a traktor overlay ship with it. I’ll let the Twitch fan boys answer your other question.
Twitch fan boy here!
Well as PJ said the Twitch will ship with a Traktor overlay and a mapping. So far from what I’ve heard it works very well. The only negative that I’ve seen with using Traktor is that the slicer feature won’t work with Traktor, but I’m sure the Traktor biys will figure out a way around that one.
There are videos on youtube showing how well Traktor works with the Twitch.
Another thing to consider is that since Itch 2.0 has been released, the Itch software isn’t all that bad and works flawlessly with the Twitch. 
Sounds good. I think I will buy the Twitch and additional Kontrol X1 für Samples and other things. After the S4 and the DX I would rather something more flexible and lighter.