I do not understand why nobody talks about role of volume analysis in Elliot wave theory. Using volume surges (increases in volume) as a confirmation of the beginning or end of a way, not just confirms the theory but also may explain processes behind a wave.
As an example, a strong volume surge during the price decline mean the panic selling. Volume is 2-side transaction and for each transaction we have equal number of buyers and seller. We have price decline because we have bigger number of bearish traders who is willing to sell at lower price. When we have increase in volume it means that new bullish traders are coming to satisfy the needs of sellers. Huge volume surge means big wave of bullish traders (attracted by low price) came and started to buy from those who sell in panic. Here, if the Bulls are strong enough (increase in volume is big enough) we may have shift in supply/demand balance toward the Bulls and the confirmation of the end of a Bearish wave