So today i was adjusting my rear derailleur because it wasn't going into the highest gear. When i turned the screw i noticed the derailleur moving but after one turn the derailleur stopped moving. But when i adjust the screw when the derailleur stops moving i can then push the derailleur manually until it hits the screw and it will go in the gear.
so it seems that the problem is in the tension of my derailleur or something like that.
Anyone have any tips for me? I can't find this problem anywhere else.