All you have to do is look at Reg SHO. Grow has been on for 58 days or so. When you have a heavily shorted stock like this that's moving, it more than likely will keep flying. Caveat is they have to get some mo mo.
If you look at FFH, it's another. There are, besides regular or legal shorts, naked shorts, and something called "x clearing". Let's just say, it's an ultra short.
Look at Acordia, ACOR. It was a shooting star. As soon as it came off Reg SHo, it lost it's momentum. They can go for a while, but obviously, if it breaks down or slows, get out. Re: Hans.
It ain't rocket science.