Designed by well-known author and trader Curtis Arnold, and Pattern Probability System has received rave reviews since its introduction in 1989. Futures Truth Inc., an independent auditing firm, ranked PPS the number one trading software in 1992, with a return of 168%, and Super Trader Almanac selected PPS as ``Trading Methodology of the Year,'' Indeed, the PPS Trading System might justifiably be called the most acclaimed futures trading system in the world. Used Book in Good Condition