In fact, these good volume readings were able to sustain themselves during the move higher. The rising wedge put a stop to this uptrend. Volume tails off as the trend struggles. Volume expands as the market falls through the bottom of the wedge and the new downtrend begins. As for volume, the story remains the same.
Volume falls off in the wedge and jumps on the breakout.
This rising wedge seemingly presented an area of indecision. As usual, volume increases on the breakout after diminishing during the pattern. Rising wedge in a downtrend. A short pause followed by renewed downside conviction. And once again, volume dries up in the pattern and increases on the breakout.