luke, MM's always shuffle the deck afterhours on certain stocks...it could be a late print, it could be a cove,r it could be a short...all guess from our end.
I've seen million share blocks on certain stocks (GBDX) go after the bell only to se that trading resumes where it left off.
Therefore, these afterhour trades in the pinks/otc are to balance the books at the end of the day. ALL IMO...
Buy,Don'tBuy,Sell,Don'tSell is your decision. My posts are my opinions only. I am neither a professional or an expert so if your looking for help, contact your Financial Advisor.