Subtract the value of the current frame from the previous frame

I want to get the difference between the value of the previous frame and the value of the current frame. Specifically, I want to identify the frame when the sawwave is about to drop sharply from its maximum value.

If you know some techniques, please let me know.

you can use a feedback to rewire a value to itself. Or just use the slopeCHOP

I was able to implement it successfully using Slope Chop!
Big thanks!

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