I've designed a chart with dates (months) on the X axis and numbers (percent)
on the Y axis. Currently, I am using the "Area" chart type which colors the
entire area below the graph line as one solid color.

I wish to have the color change from one color to another at certain points
on the X axis. An example of something similar is found at the bottom of the
linked page:

http://gueriteadvisors.com/Strategy/indicators.cfm

any help would be greatly appreciated!!