The best strategy may be to hold, or it may be to sell and buy back in when the turmoil settles down. Like yesterday afternoon, big sellers got in late and drove the price down. Smaller bites are easier to get without affecting the stock price greatly.
All it has done is make a simple four point reversal from 10.50 to 8.50 where there is a support line at 8. (Similar to its move from 9.50 to 7.50.) That line should hold it above 8.00 but MCHM has a history of hitting support and resistance lines and then bouncing back. It even has a recent history of fooling people by giving false sell signals then making dramatic upward moves. That is a certain sign of manipulation IMHAEO.