I have a hierarchy and I want to get the difference between the value of the first date (week 2, check twbx) and the last date (week 42, check twbx), as well as the difference between the first date (week 2) and the second to last date (week 41). However, no matter what I've tried (LOD calcs with fixed and VLOOKUP) i couldn't manage to create a correct view, basically due to the Hierarchy, which however is a mandatory thing in this case. TWBX included! Any ideas ?? Thanks everyone!!