here si some info about short...on shares...
The Basics
When an investor goes long on an investment, it means she has bought a stock believing its price will rise in the future. Conversely, when an investor goes short, he is anticipating a decrease in share price.
Short selling is the selling of a stock that the seller doesn't own. More specifically, a short sale is the sale of a security that isn't owned by the seller, but that is promised to be delivered. That may sound confusing, but it's actually a simple concept.
All I have to say is I'm here to give my personal opinion, and you don't have to follow my advice, please do your own DD before you invest. And don't blame others for your bad choices".