Optimized entry (green vertical line on the chart below) or exit (red vertical line on the chart below) is part of seasonal patterns. For example: the spread X–Y shows a strong seasonal up move in July with an optimized entry date on July 3 and an optimized exit date on July 28. This means “usually” the spread moves up between July 3 and July 28, but this is just based on statistical data of the p...