Total Sales X Custom Period (day 26 current month to day 25 next month)

Hi Guys...

i have this simple model:



Measure to total sales:

Total Rev = SUM(fSales[Valor_Venda] )

Then i create a Total Month to Date measure, that gives me a month period:

Rev MTD = CALCULATE([Total Rev];DATESMTD(dCalendar[Data]))

Create a table visualization like this:



Now i want to running total, but set the period from day 26 (current month) to day 25 (next month)... 

Someone help me?

Cheers