Option Block 71: The Spread Trap Option Block fans, if you have ever wanted to see what goes on behind the scenes when taping an episode, your chance has arrived. The entire gang will be live, in person at Elephant & Castle at 111 W. Adams Street in Chicago on July 21. Taping will start around 3:30, so you won't miss a minute of market action. Stop by, bring your friends, and come prepared for a podcast experience like no other. If you're inclined to want to RSVP so that we make sure we have enough room, you can do so at the Options Insider Facebook page. Trading Block: The gang discusses GLD, SLV, the Euro, Kodak, and the commodity rundown. Odd Block: Unusual activity in DNDN, EW, IO, and BAC. Plus, how to tell if a large trade is a buy or a sell by using deductive reasoning. Xpress Block: Mark & John discuss problems Mark had getting filled on an EK spread order at the NBBO. Around the Block: Long weekend.