Oscar,

Perhaps these examples can help:

http://www.peltiertech.com/Excel/Cha...OnTwoAxes.html

http://www.pdbook.com/index.php/exce...with_two_axes/

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Regards,
John Mansfield
http://www.pdbook.com

"Oscar" wrote:

I would like to compare two data sets on the same chart using stacked bars.
The data ranges are different by several orders of magnitude in one case, so
I would like to use two axes. My x-axis is time in months. I would like to
have both data sets displayed against each month. I cannot find a
appropriate chart in PowerPoint's custom chart nor can I find instructions on
how to create a custom chart. Anyone have an idea? Maybe Excel is the way
to go.