I actually know some amateur traders who act on such things in a discord chat I'm in. They have their own algorithm that runs against market data but wont shar

I actually know some amateur traders who act on such things in a discord chat I'm in. They have their own algorithm that runs against market data but wont share it. It seems easy enough - when lots of volume moves in a relatively short time period, it shouldn't matter who the purchaser is. An algorithm should be able to catch on. Thoughts?