If the image looks confusing at first glance, it simply shows bitcoin's price history in green with USD on the vertical axis.  Then an oscillator is superimposed, at arbitrary scale and position so as to show its correspondence with the price to best effect, in blue.  The oscillator uses trig functions and moving means of 210,000 blocks, which makes it top once and bottom once per halving.  Oscillator input comprises btc daily closes and block timestamps.  
The oscillator has not reached the top of the current cycle.  Maybe I'll get lucky and the oscillator will track the price movement like in 2017, but maybe we'll get some crazy stuff like in 2021.