DH "Slingshot" as Seen on BTC - Trying to Simplify a Recurrence

I see these alot.

Descending Heartbeats.. I'm interested in this case that when the gap closes after a 3 candle flatline there is a Bullish run up closing the gap.. I went a little too complex initially grouping this guy with the AH.. Let's Break it down a bit more..

It looks fairly symmetrical if you draw it like this..

I've included two fib measuring tools and over time we can measure and log performance