A Bloomberg Terminal, amazing but $$$$. If a good hedge fund does this then it will be done quietly and across accounts, in dark pools, as a direct trade, or other "off tape" move, often reported later. They're not just going to throw a 1% sized trade in as a limit order for you to see, so the "act on it quickly" part is not as easy as you may think. (Former professional trader)
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?
