GPRO is a prime example of why the shorting game is broke, at least in a multi-day basis. The company is totally overvalued, is about to raise $$, lock up expiry coming soon and insider will dump. Yet the stock keeps hanging on and squeezing shorts. over 95% borrow rate so even the 'value' shorts get hosed as their long-term holds drain up all their money
I'm focusing on daytrading now and most of the time on the short side, but the only way it works is if you take profits in the pullbacks and are disciplined when the stock is strong. Otherwise you get killed.
The only multi-day/week shorts that kinda work are small cap low priced junk stocks ($1-$15 range). Companies that are so shady its tough for even idiots to buy. I mean, they do buy it but they don't hold for the long-term, its just a momo game that turns and then you can profit on the way back to earth (DGLY, ISNS, LAKE, etc)