If the recent price action in Mags has shown traders anything it is that when trading this stock it is better to just buy and hold. Don't try to time the swings, buying and selling.
I nearly sold my shares today when mags sunk between 2-3PM but I didn't and the stock went back up and I realized this kind of price action has been endemic to this stock and that the wisest thing to do is to just hold my shares and not get caught up in all the crazyness.
I don't think anybody ever did well over the long run shorting stocks, certainly none of the posters we have heard from have ever been successful at it.