So, 1a2b3, this is very interesting, but are you going to develop it? So you wait for a down bar on high volume, and start averaging in. How much of your portfolio per each average in, and over what period? And when do you stop averaging in, get out on the downside (it keeps going down and down and down), and get out on the upside? It seems that if you start averaging in when you have a down day on high volume, a lot of the time you are going to be picking times when it has a looong way to drop, even though many (most?) you will be picking times when it is about to turn around.
Seems your strategy is very much opposite the chart/etc. that suntrader was posting.