Z-charts

[#1]

Hello,

I want to make a Z - Chart like that :

It's Ok for A and B but I have a Problème with the C Chart (Slid sold over the last 12 months)

Does anyone have an idea ?

[disqr_rm]

Interesting. Do you have sample data to play with?

[#3]

Thank you for your interest in my problem.

I put the attached application with the curve.

I am available for any questions