Get data from same weekday from last month

Hey sousahebert!

Sorry I'm just now getting back to this. It looks like you might be after the value from thirty days ago. Here is the formula I used:

MsrValueLastMonth = 
SUMX(
    DATEADD(MES_ATUAL[Data de Cadastramento 2],-30,DAY),
    [Qtd_Processo_M0]
)

Assuming that is what you need, this expression should help. It simply goes back thirty days and executes the [Qtd_Processo_M0] measure. You can change the second parameter of the DATEADD expression to go back a certain number of days. You don't have date values for every day of the month in the MES_ATUAL table, so some rows will be blank. Here is what it looks like in the table visual:

HERE is a link to your sample file with the added expression.

Hope this helps.