Ok, so I have been practicing the changeup for some time now, using both the Three Finger Grip and the Circle Change grip. For some reason, it doesn't have much movement on it, usually just being a straight fastball, with sometimes some sinking movement. I throw from a 3 quarters delivery, and sometimes when I lower my arm angle while throwing I get some more movement, and with the curveball as well. Anyone have any tips? I hold it tight and deep in my hand, and still no movement. Thanks to anyone who answers.