Average measure per row in pivot table (Background Color Expression)

[torraroger]

Hello all, 

The objective here is to color background depending on the average measure per row. 

My pivot table is the following:

row = [Activity L3]

Column= [Location (Site)]

Measure= Count(Workbook)/Count(distinct(User ID)) 

*each activity has certain Workbooks assigned. Workbooks are visited by Users.

I need an expression to do the following: 

- Per each row, color background Green() when the measure is bigger than the average total average of the row. 

I tried the following with no success: 

if(Aggr(Count(Workbook)/Count(DISTINCT([User ID])), [Activity L3], [Location (site)])>=
Avg(Aggr(Count(Workbook)/Count(DISTINCT([User ID])),[Location (site)],)), Green(), Red())

Any help would be great!!

Thanks