Thanks for your answer, I m not familiar with the OverlapCircle so I migth be mistaking but are you telling me to use it because I said my gameObject was empty ?
Because .. Yeah don't know why I didnt talk about it but the GO is parent of another one which has a RigidBody and is responsible of triggering the boxcollider wich set "stopMoving" to true. So yeah im not sure if you talked about that because of my mistake not mentionning the rigidbody, or if there could be a solution with OverlapCircle. Sorry ... And thanks again