With this program you pick the commodity, the months to plot seasonals for and the number of years to use to make them. The chart
at the right shows why this is useful. Notice the divergence starting at the beginning of the August seasonal between the June and August
seasonals (which are moving downward) and the rest of the seasonals (which are moving upward) with the distance between the two groups
increasing. This points to a potential spread opportunity.
Though only one cycle is shown here, it is possible to show two cycles of the seasonals so that, for example, the end of the August seasonal
could be compared to the beginning of the October seasonal.
See Using Seasonal Divergences to Find Spread Opportunities for more information.