Measure for scaling Y-axis with Measure acc. to Currency

[PetrM]

I have a measure for "+5%" scaling of Y-axis.

Measure_MaxY =

    MAXX(

        SUMMARIZE(FactTable, DimCalendar[Ultimo], "Max Measure", [Measure])

        , [Max Measure]

        ) * 1.05

I need to amend the measure so that it doesn't scale for total of Measure, but for a subtotal according to Currency dimension. (A line chart with Currency_Cluster in Legend).

The following somewhat works:

Measure_MaxY2 = MAXX(

                 SUMMARIZE(

                     FactTable,

                     DimCalendar[Ultimo],

                     "currency_cluster",

                     MAX('DimCurrency'[currency_cluster]),

                     "Max Measure",

                     [Measure]

                 ),

                 [Max Measure]

              ) * 1.05

meaning the syntax is not incorrect, but it seems to return higher value than what I expect, so sometimes the scaling looks "+5%" as expected, but perhaps most of the time, it is "+20%" or so. Any ideas where the problem might be? Thanks.

[lbendlin]

use EVALUATEANDLOG  and DAX Debug Output to look into the MAXX array to see which values may be unexpected.