To elaborate on the equivolume chart, I might paste 100 charts on that setting and not see a damn thing that catches my eye, but sometimes they just keep coming. Like the oil and gas sector right now.
I was looking for another example and found this one. You can clearly see when big money said enough was enough....
Also if you have lines drawn on your chart they hold through the setting change and in a 1 in 200 gives really good looks. I'll see if I can find something to example. Might not be till next week.