A recent article (Market facts: Three-day pivots, Active Trader, August 2007) analyzed 10 years of S&P 500 data and showed Monday was most often a three-day pivot high between April 16, 1997 and April 11, 2007, while Wednesday was most often a three-day pivot low during this period. This article takes the analysis a little further and develops a technique for turning those observations into a trading system.