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Formula Conditional line chart


This chart displays a line that changes colour depending on whether it is above or below a control line. It is based on a xy-scatter chart.
The formula calculates all the intersections and then the sorted values are plotted using 2 series.

Full credit goes to Dave Curtis, a forum member at OzGrid. who provided the formula to calculate the intersections.
I was able to add the formula to dynamically sort the resulting values.
Update 16th February 2008:
Apollo Huang, a fellow MVP from China, pointed out a flaw in my sorting formula, which was picking up incorrect cell values. I have incorporated his formula revision in to the download.

The download contains data based on the RAND function so will generate new values automatically.

Created August 2004
Last updated 5th August 2014 

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