The high volume might suggest a turning point higher. Simply more than usual selling, because that side thinks prices are too high, and like to short, and the other side may have growing numbers of people thinking prices are too low. Could be like a tug of war situation.
How about this one? Millions of new buyers, against Goldman Sachs gov’t lap dog selling naked at the same time. More volume needed to fight against longs. Special manufacturing interests (jewelry, space and defence) that take delivery, enjoy low prices to keep costs down.
Or it could be the same “100 guys”, or computerized trading machines, all each going in and out 500 times in a day. Wheel spinning. One time I had to talk to an IRS agent to explain something. About such a big 1099 and a small profit. I told her, if you go in and out very often, with the same $40,000 it can add up to $3,000,000. And show a profit or loss of $40,000
Only if you don’t mind, what tickers are you sitting on.