This morning I made a large percentage profit on a position that the Japanese Yen was going to be strong. It seems that the estimate was correct, but I made much more money than expected. I more than doubled my entire portfolio. Was it a market anomaly that the USD/JPD rate dropped so low a few hours ago, could it have been random, or why did I make so much money?
I was short selling, what risk did I actually take when winning this much?