Greg Schnell, CMT, MFTA, specializes in intermarket and commodities analysis for StockCharts.com. He contributes market analysis commentary to several blogs that garner between 5,000 and 10,000 readers weekly. Lita Epstein, MBA, has written more than 40 books, including Trading For Dummies, Bookkeeping For Dummies, and Reading Financial Reports For Dummies.