Why is there no vertical scale on the siderograph?
In the siderograph plot produced by the computer program I created, the upper portion is the Bradley Indicator curve, whose formula is given in #4 above. In the lower portion of the plot screen is the graph of the Middle Term values. Both of these curves oscillate around zero, i.e., the daily values cycle above and below zero during the course of time. In the upper portion, which contains the Bradley Indicator siderograph, the graph is produced so that the maximum annual value just touches the upper edge of the graph area while the minimum annual value just touches the lower edge of the Bradley Indicator plotting area. However, the arrangement is slightly different regarding the Middle Term values that are plotted in the lower portion of the plot screen. Here we created a centerline denoted by 0 that represents Middle Term value = 0 (zero) and any plot that is a positive value is drawn in the “+” area above the 0 centerline while negative values are drawn below the centerline.
