Quote from palinuro:
Ivo,
I'm sure Spyder will have a better explanation, but since he's probably sleeping now, I'll give it a try.
Volume increases throughout the dominant traverse (and it will be predominantly dominant volume). Keep in mind that there are 3 possible ends to a dominant traverse. As volume peaks, price :
1 - hits the LTL,
2 - FTTs, or
3 - creates a volatility expansion.
After 3 price may continue (with more volume), but after 1 or 2 price changes direction as volume peaks. So color and direction change, but volume stays high, and then decreases as price makes the nondominant traverse. Whether that happens intrabar or over a series of bars depends on market pace and the resolution you're monitoring.
I don't think it makes sense to compare black volume before and after the FTT, as you suggest. Assuming we're in a down channel, a black bar before the FTT would occur within a subchannel, whereas black volume afterward would be the nondominant traverse of the main channel--a different resolution level.
Regarding waiting: yes, but I think the goal is to tune yourself well enough to the ebb and flow of volume and the interaction of the various levels of channels that the lag becomes unimportant. To reduce lag at one level you need to have the ability to monitor accurately at the next lower resolution level, etc.
FWIW, I found yesterday after the drop especially tough because there were so many periods of fairly flat volume and price, followed by sudden spikes which were hard to anticipate. Before the spike I didn't know what direction to take, and after it seemed too late to enter.... Perhaps that's why Jack talks about bracketing CCC periods, though Spyder seems to do "OK" without doing that.
Hope that helps.