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I created a separate page today and added the Nasdaq 100 stocks, as you'll see on my twitter, and looked at the volume compared to average volume on all of them. Which showed that around 75% traded below average volume today, when the Nasdaq 100 had around a 3% range on the day, closing up +1.17%. So definitely not an accumulation day. Which is interesting, and something I'm going to start following going forward.

[url=https://www.stageanalysis.net/blog/29261/us-breakout-stocks-watchlist-15-june-2020][/url]....

I wonder how that compares to the cummulative advancing / declining volume line?  But you are comparing the overall market volume with its average.  I'm wondering if there is an indicator here, % stocks trading above their 200 day SMA volume perhaps?  But that does not take account of direction.  So perhaps the indicator would just be comparing the advancing / declining cumulative volume line against its MA?