Jay Kaeppel is a trading strategist with Optionetics, Inc. and writes a weekly column, Kaeppel's Corner for optionetics.com. Kaeppel has been active in financial markets for over two decades. He was the head trader at a CTA for 8 years and a trading system and trading software developer for 15 years. As an author, Kaeppel has published three books on trading, "The Four Biggest Mistakes in Option Trading" (1998), "The Four Biggest Mistakes in Futures Trading"(2000), "The Option Trader's Guide to Probability, Volatility and Timing"(2002) and "Seasonal Stock Market Trends: The Definitive Guide to Seasonal Stock Market Trading"(2009). He has written over 25 articles for magazines, such as Stocks and Commidities and Active Trader.