Convet FK to IK for CAT limb animation

I have FK hand animation. I want to convert this animation into IK.

For this I:
1. create IKTarget,
2. select this IKTarget,
3. turn on AutoKey-mode,
4. press "Move IKTarget to Palm" button for every frame. This is very tiring, especially when there are a lot of frames!

Help me please. Is it possible to somehow automate the process of pressing the "Move IKTarget to Palm" button in each frame from the active time segment range of track bar?