The graph says everything, no one knows where the ATH will be, the 2 things that would make me sell my crypto are: 1) Touching the top of the Logarithmic chart. 2)Loosing the weekly EMA 8 after reaching values close to the top of the log chart.
Now I believe the biggest support is the weekly EMA 21, but close to the end of the run which is when BTC will be reaching the tops of the Log chart it can´t loose the weekly Ema 8.
Also, keep in mind that alts will top weeks away from BTC ATH. That´s why Dominance is so important to understand the end of the cycle.