I actually had a open order to buy ZSL at 25 on a stop a little while back. It never was hit. Based on the price of silver that day in the overnight market it would have been hit, but it never was because the time the stock market opened silver had retraced quite a bit. I placed the order in my etrade account, but it said the market was not opened at the time and when the market opens it would review my order again. I was glad I was not filled that day because it snapped back.
I will try to post on my reserved profit potential of ZSL later or tomorrow as it has to do with how the leveraging works.