Join the ranks of the most successful option traders by mastering the key concept affecting option pricing - volatility. The world's most acclaimed volatility expert and ''Trader's Hall of Fame" award winner Sheldon Natenberg provides a powerful, nontechnical, step-by-step workshop for understanding why and how volatility plays such a critical role in options trading. Discover the strengths and weaknesses of using option models. Learn the vital part probability plays in estimating option prices. Discern the difference between historical volatility, future volatility and implied volatility - and the function of each.