Quote from cnms2:
My interpretation is that the asymmetrical relationship between price and volume is the effect of the channel slope. You can notice gaussian peaks on both trendlines of a lateral channel. As the the slope becomes non-zero, one of the peaks gains in amplitude, while the other one decreases.
What we see on the chart is the effect of the superposition of several fractals of sentiment, from which usually only a couple are relevant.
When you look at the price movement in real-time you notice periods of acceleration which coincide with peaks of volume and of deceleration which coincide with low activity levels.
In the proximity of both trendlines there is a short period of activity reduction (low volume), causing a price movement pause. It is just easier to notice it by the right trendline, because of the overall lower pace there. This is the signal of change in sentiment and in price direction.