progression Month vs Month+1 in chart

[#1]

Hello

How can we do a month over month progression

a histogramm that shows sales  from Jan till december , for each month I want to calculate progression from previoous month

Jan 2015:

Progression Jan2015 vs Dec 2015

Feb 2015

Progression Feb 2015 vs Jan2015

etc.....

Regards

[#2]

Hi,

Try use the function AddMonths(date, -1)

Regards

Marcos Freire