Here's a start. Bigger picture the theory is rooted in institutional volume, and that resonates with my brand of technical analysis which is very much "just try to do what people smarter than you are doing" as opposed to coming up with some whiz bang thing where I'm on my own. So search for things like "institutional accumulation", "accumulation/distribution zones", and "supply/demand zones".
FTR I don't use the A/D indicator. I look for ~small candles with ~small wicks, which are potentially an indicator of a good amount of volume in a small price range and relatively short period of trading (say, 3-4 days max), and I'll verify volume in those zones by switching my X axis from daily candles (which is my standard timeframe) to volume based candles. If the volume candles are also small in those time periods, that's a good sign. FWIW I'm currently using 17M share candles, as that's ~1/2 of ~current average volume (which has risen to ~37M from ~34M when I last reset my candle width), though the actual candle width really doesn't matter
that much in context of how I'm using it. I do this analysis in my primary platform, Tradestation.
I'll also supplement that analysis with the longer term price-volume histogram that's pretty convenient from Fidelity (the second screenshot from above). This gives me a bigger picture look at where we really are and what kind of institutional actions may be coming.
