I will agree with you that any advance in HMGP sp will most likely be from a purely "technical bounce". The momo players could move this up quickly on any type of upward pop. With the long down trend base-lining now, the chartists would be encouraged by any break to the upside.
The fundamentals for this stock, on the other hand, do not look well for a long term play. I would use any rapid sp bounce to sell into the advance. Maybe not all, but at least half if it fits your situation.