I will note that the best analysis will fail should the market simply perform in a different manner "as it usually does". For this you analyze with the understanding that THE ONLY CONSTANT IS CHANGE AND ONLY CHANGE IS CONSTANT.
The chart above is how I do volume comparison. Because most of the methods I've seen I don't even want to use because they provide no real information. Top is regressions for price and bottom is regressions for volume as related to price, meaning the colors match for top and bottom. Dash line in PIVO (Pham Infinite Volume Oscillator) is h-line like any volume-derived oscillators. This is 12 hour bars for tops in 2006 and 2011 and presumed top for 2020.
That said, look at the black arrows first, they approximate where we are with respect to each chart. In each situation, we have topped and have proceed to make the first bounce. What can we steal from this if anything? If price intends to double top, it usually makes its intention known by holding the the blue volume layer on top of the red volume layer. That is to say that "momentum of buying must be consistent" enough to make price do that. --- to be continued, will add later...