Market profile steals from Wyckoff still supply and demand There is really nothing new in technical analysis just different waves to express and interpret. Wyckoff was around in the 1930's and his stuff still works.
Wyckoff based everything on supply and demand. Market profile fills in the blanks and uses Wyckoff.
So when markets have break outs there is no overhead supply (which causes resistance and areas of congestion like a bunch of cars in bumper to bumper traffic) and so markets zoom up.
Now when markets correct they come back to low volume areas then the market attempts to return to value area where there is big volume.
Bollinger called it reversion to the mean (return to median prices). Prices become overvalued fairly value then undervalued.
So we are headed to spx 2200. The market will then be undervalued and begin the move to fairly valued then overvalued again