Although it is explained well I think I need someone to make a chart to visualize how this works. I do understand how to make a profit when BTS is declining in value. Buy, not borrow, a Hero. The Hero price is relatively stable and as BTS decreases in value you will get more BTS back when you sell. It takes more BTS to buy a Hero. If you watch for the Call Margin price and sell when it shows up in the order book you can make a tidy profit.