This is how I have been using better volume to confirm entry on the butterfly pattern. I hope to get better examples in the future but this gives you a good idea.
You will see here as price approaches point D of the pattern that we have Red Volume Climax bars ( High Range and Volume ) is it then followed by a Yellow Low Volume Bar confirming that the market is running out of steam.
I use the break of TMG Bands, the low volume bar (Yellow) after the high climax bar (Red) along with the trix cycle indicator to confirm the move.
IMPORTANT!!!!!! - The Red high climax bars can also mean and uptrend continuation so please always wait for the yellow bar / or push down to confirm that the market it running out of steam along with your other confirmation methods
Here are the MT4 indicators and instructions ....
BetterVolume 1.4 - With Email.mq4
BetterVolume ChartBars part1 1.4.mq4
BetterVolume ChartBars part2 1.4.mq4
Here is a Youtube Video for those who don't fancy reading.