As you can see, volume dissipates during the formation of the wedge pattern and then picks up on the breakout. Falling wedge in an uptrend. Volume dips during this pause and then picks up on the breakout and trek higher. Falling wedge in a downtrend. This pattern was able to reverse the downtrend nicely.
Volume drops off in the wedge and then comes back as the market moves out of the pattern.
Falling wedge in downtrend. After waning volume in the wedge, there's a good increase on the breakout. 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.