As the world celebrates the Death of Bin Laden, the equity markets actually sold off instead of rallying as expected. Silver also took a big hit, down nearly 10% on the day. Is this the end of Silvers run? John Barrett joins the show to talk about how he trades parabolic moves, like silver, and what he has learned over the years about how others trade them. John also discusses how he uses supply and demand levels to spot  turning points and origins of big sell-offs. PowerPick: FST