ARTICLE SYNOPSIS ...Stocks & Commodities V. 23:3 (30-35): Sound Systems by Robert Pelletier and Sabrina Carle Too often, trading systems are based on coincidence rather than on sound scientific or mathematical principles. Here's how you can create a trading system based on logic. Just before the 2004 US Presidential election, people across the United States were talking about the predictor that had called the Presidential winner for an amazing 16 campaigns. From 1936 through 2000, the success or failure of the Washington Redskins football team on the Sunday before Tuesday's Presidential election had successfull...