Alas, I did not jump on any inverse energy which was the play yesterday and it looks it has some legs for next week. I did however pick up BOIL and UVXY premarket and that is paying off. I don't think BOIL will have much follow through but the market looks unsteady so UVXY could run here a ways.
Looking at M's update today, the chart in the previous post is confirmed 'close enough' for me to what M might be using.
The $BTCUSD:$ETHUSD version moves quicker (the 8 and 21 cross a day or two sooner) than the GBTC:ETHE version, but both are now 3 for 3 when used for weekly decisions.