As a former Chicago floor trader I can tell all of you that the big money is made by recklessly adding to losing positions. Floor traders have NO margin requirements, and risk monitoring by clearing firms during the session is sketchy at best. I can think of dozens of locals who made a few million in a few years and then went broke. On most any big trend day up or down you'll hear of of guys getting "carted away." Without being a gossip there are even a couple of "nationally known" traders here in Chicago who are in dire straights.