Compare rvalues - Bar Chart

[#1]

Hi,

I need to plot a bar chart to compare results from a month to another.

Ex.:

Product Month_1 Month_2 <> 2/1

X 20 18 -10%

Z 10 11 10%

I have the following expression on a pivot table:

(SUM(AMOUNT)/BEFORE(SUM(AMOUNT)))-1

How can I do that?

Thanks,

Ronan