I know that many times you have needed to pull up with little or no feet. This movement works that specifically.
You can start with bigger holds and then move to tiny crimps. It cane be done on a near vertical wall and you can progress to a steeper angle.
Be sure to push hard with your feet and pull as high as you can.
Just 2-3 sets of 10 on this movement twice a week can improve your smearing and pulling!
Have fun and work hard!
piz : )