Patrick -

Try one of these:

http://peltiertech.com/Excel/Charts/AddLine.html

- Jon
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Jon Peltier, Microsoft Excel MVP
Peltier Technical Services
Tutorials and Custom Solutions
http://PeltierTech.com/
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Patrick question on chart reference wrote:

I'm trying to show a reference limit on a chart. That way I can see where
the bar lies relative to that limit that is constant throughout the series
established for the bar.