This is the basic seasonal charting program. You choose the commodity, month, and number of past years to include. The program calculates the seasonal index using the Link Relative Method as outlined on page 121 of Jack Schwager's book, "Schwager on Futures", (1981), though detrending has not been performed.

The black line is the seasonal, the gray lines are the seasonal plus or minus one standard deviation and the blue line is the nearest open contract of the selected month. The standard deviations have been smoothed to remove daily fluctuations.

Notice that the standard deviation curves move closer to the seasonal curve (indicating a greater reliability) during the downtrends but move farther away during uptrends.

1. Pick a commodity and a month.

2. Select the chart type. The jpegs are faster; the applets are interactive (zooming in is possible and there are data popups).

3. Select the number of years of data.

4. Press "Get Chart". There's a lot of data to download, so be patient.

This is a limited set of commodities available to nonsubscribers. Subscribers can access data for over 40 commodities.