Need help for crouch touch control

i am making a side scrolling game for mobile i want it to crouch when moving the touch control down and jump when moving the touch control up… i have the jump and crouch command but that is when pressing a certain key… i want to control both jump and crouch in touch control but i dont know how to do it…

here is the clip of the test : UE 4 touch control for crouch help - YouTube