Formatting rules for tables

[fmozas]

Hi,

I need to make a format rule for one table of Webi Report but I don't Know how to do it.
I have a variable for the header of my table [Header Summary] that it's a structure of Months (Jan, Feb, Mar, ...), Year to day and Objective. I have differents rows for differents lines of production and every line has it's own indicator.

I need to make format rules that color the data red in case the value is less than the value of the OBJ column. Is this possible?
My problem is that I don't know how to create a condition that compares two columns that come out of the same variable that works as a structure

Thanks