Originally posted by D_Cokolades
I think he is using a wrist to.

Finger movement for picking doesn't mean that your wrist and forearm should be fixed like concrete, it means that the main movement comes from your fingers .
On the other hand , if you use wrist movement , you'll find your fingers pretty fixed... Check out yourself , with low tempo so you can notice precisely.

Don't try to analyze other players' technique and copy it as if you were his clone , good picking should come natural to you , with a little hard work at the beginning.