Curve ball

I can make the curveball break in a 12 to 6 but how can I make it drop from a 10 t0 4 angle, I throw my curve the same way and sometimes get the 10/4.

This is a really helpful website!
Thanks for any responses

if you want that 10 to 4 curve, youll have to throw 3/4
think of your arm as a hand on a clock, to get that pitch to break that way you have to throw it at that angle.
set up a cam if you can from behind you and see if your too different curves look as if there coming from the same arm slot.