This is the list that you really have to master because these are the MARKET MAKERS that can kill a stock in a hurry when there are the sitting on right side of the box on Level 2.
HDSN: killed CKYS single-handedly
VFIN:
CGFL: new kid on the block for sub dilution
RBCM: Old CLYP. Has killed many sub penny stocks in the past to no-bid.
FANC: used to be a heavy S-8 seller. May show up once in a great while.
SSGI: aggressive on sub penny stocks
If you can document this data and explain how it was collected, it might get someone with regulatory authority to remind VFIN that they should at least pretend to comply with the short selling regulations,