I do this by creating a new series for each "condition" you want to display.
Let's say you want to format points that are less than 100 as red, do
something like this

=if(A1<100,A1,NA())

The NA() values will not be displayed on the chart. Create a series for
each color you want to display.
--
HTH,
Barb Reinhardt

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" wrote:

Hi,

I have a chart and I would like to format the line so that if it is
below a certain value, the line is red. Is there any way to do this?
I'm pretty good with charting in excel.