User Functions in Expressions of the Charts

[#1]

Hi,

I have a table of the database with Product, Price1, Price2 information.

And I have to report/list in QlikView one or the other price depending on a rule.

Because it's for more than 1 chart it's a good idea to write the rule only in one function and to use it when necessary.

Where I have to write this function? And/or how can I call it in Expressions of the Charts?

My version is 8.50.6231.5

Thanks a lot

Best Regards

Marilena