How to use collision and character movement to drive audio.

Right now I have a class blueprint for a wall. That wall has a trigger component that I am using to trigger the sound of hand touching a wall on begin overlap, and the sound of a hand leaving the wall on end overlap. I would like to trigger sounds of a hand sliding along the wall when the character is touching the wall and moving. Any idea how to do this? I cannot find any events in the class blueprint that monitor character movement.