Same question as # 6. The Bradley Indicator is plotted in the upper portion of the siderograph screen. Every year’s plot is made to fit the plot area, i.e., the plot is adjusted so that the high for the year, whenever it occurs, will exactly touch the upper edge of the Long-term plot area. The same goes for the lowest value just touching the lower edge of the plot area. This is why there is no numerical scale on the siderograph plots. Since the Middle-term value never diverges that far either above or below zero, the plotting for the Middle-term area is somewhat different. For the Middle-term plot, the greatest absolute value of the Middle-term values is used to compute how to fit the Middle-term plot so that the maximum absolute value just touches either the top or bottom edge of it’s plot area.