Conditional formatting on rows

Good morning,
I have a Pivot table with weeks as columns and I would like to use the conditional formatting on rows (horizontally) in order to have a gradient conditional formatting of the data showed Week over Week instead of the normal conditional formatting on columns (vertically) which only gives me the possibility to compare data of the same week.
Is that possible? Could anyone guide me through that?

I don’t believe this is possible yet. I can mark it as a feature request.

Thanks!