I think taking a look at the past is one of the best ways to predict the future. History repeats itself over and over again.
Wyckoff always emphazised Volume as the best Indicator. He also challenged us to ask ourselves "what is the composite man doing right now?"
I think he was spreading FUD like crazy, while accumulating
Phase C
Remeber what the Spring aka Shakeout is: It’s usually the last attempt of the Composite Man to acquire shares at cheap prices before the mark-up move. Creating selling pressure forces retail traders to think that the current trading range will end in the mark-down movement (along with FUD) and exit or reverse their positions. The Composite Man waits for breakout to create enough liquidity and then rapidly covers all available supply resulting in price getting back into trading range.
Test: A small retracement to check if there is enough support at the bottom of the trading range after a shakeout. The Composite Man stops his buying pressure (as we see on VOL) and checks if the market has enough demand to not let price fall below the trading range. If so, the market is ready for the mark-up move. If not – the Composite Man continues his accumulation of available supply
Phase D
LPS: is the reaction after a Test rally. It usually retests previous levels which were considered a resistance. These reactions are usually quite slow and have no volume (as we see right now!)
Right now for BTC the VOL should stay low, because the Institutions stopped buying and manipulating, to check if the retail is ready to push the price up, or if there is any major selling pressure. This might take a while and might be a little more back and forth than in 2015. Once we break above 40-42k and CONFIRM it as support the Volume will come back in and from their we good.