Yes you have done well. A model for the rest of us here.
I too share what I am doing with my two 20 something children for two reasons. The first is so they see and understand what I am doing. The second is to teach them how to do it themselves.
I have accomplished the first, but both are struggling with the second. I try to present and explain in the simplest of visual graphical ways (no math required), but it is still difficult for both of them to replicate. I continue my attempts though. GLTY
When I simply change the ticker from FNGU to FNGD, the -3x version, I seem to get the expected inverse chart of the price bars, and also the inverse chart of the MACD using the default values.
However, the lowest indicator on the chart, the one with the 65,90,10 values you use, the resultant chart is not what I would expect. Any ideas why? I would like to use your M65 indicator for inverse ETF's too.