Looks like profit taking to me. Don't believe there's any shorting. remember this stock has been in low one penny area for the better of two months, with people unloading for taxes, and most of all fear. Anyone of us that bought during that time has been up 100%. Any prudent investor, trader will take profit with such gains and at least sell half.
Lack of buyers and profit takers in the PM. That's what went down today. forget the MM shorting stuff. It's mostly a bulletin board legend.