One of the main reasons traders may look to a contract like a binary option is risk control. Any seasoned trader in any market knows that prof t- ability on any given trade is secondary, but risk management on every trade is mandatory and of the utmost concern. This is particularly true when par- ticipating in leveraged markets such as futures and currencies, where one mistake can not only result in large losses, but in some cases, losses that exceed the amount of capital in the trader’s account. This can create an ugly scenario for any trader—the dreaded margin call. If you’re not famil- iar with this concept, just think of the reaction of Randolph and Mortimer Duke at the end of the movie Trading Places and you may have a good idea of the devastating effect a margin call can have.