If motion controller is moving left in collision box...

Hi, I am trying to trigger an event when my motion controller is moving towards the left after grabbing something. I have managed to trigger the overlap and now I can’t figure out how to tell if the controller has overlapped and is now moving towards the left. For example, if my VR hand is inside a collision box for a sliding door, moving the hand left will move the door left also. Thanks for any help.