Analysis services: Dynamic Weighted Allocation on different writeback levels

Question

I'm using an Update Cube Statement to Writeback Values from a frontend (XLCubed) to the Analysis Services Cube.

UPDATE CUBE [Planung] 
SET
([Measures].[Kg Anpassung]
,[Datentyp].[Datentyp].[All].[FJ Plan]
, [Produkt.[All].[Element from level 1])
= 77000
USE_WEIGHTED_ALLOCATION
BY
([Measures].[DB1], [Datentyp].[Datentyp].[All].[LJ], [Produkt].[All].currentmember) / ([Measures].[DB1],[Datentyp].[Datentyp].[All].[LJ], [Produkt].[All].currentmember.parent)

The Value (77000) is Allocated by the Values of the Actual Year (LJ) in a different measure. The Weightfactor is calculated by looking at the Product it's writing to divided by its parents value.

With the code above it's possible to Input Values on Base-Elements of the Product-Hierarchy or on level 1 of the product-hierarchy. But it is not possible to write to elements on the level 2 of the product-hierarchy, as you need the parent.parent element of the base element to calculate the weight-factor.

Base Element (Level 0) -> Written Value = Input (handled by Frontend)

Level 1 -> Written Value = Input * (Actual Year / (Actual Year, Product.Parent))

Level 2 -> ?

• Is it somehow possible to write a formula which is valid for every possible level in the writeback hierarchy?
• Alternative: Is it possible to read the level of the element my input is done on?

Best regards Paul