Months comparison based on data dates

Hello,

I need Month vs Month comparison based on dates in my table (not based on "today()"). Table is auto updated twice a month so what I need is to compare latest month in data with previous month e.g. if today is 2019/05/23 and the latest date aviable in data is 2019/04/12, then compare april with march.

MvM% = 

VAR CYear = YEAR(LASTDATE(SOURCE[DATE]))
VAR CMonth = MONTH(LASTDATE(SOURCE[DATE]))
VAR LMonth = PREVIOUSMONTH(LASTDATE(SOURCE[DATE]))
VAR CCMonth = CALCULATE(COUNT(SOURCE[UCET]),FILTER(ALL(SOURCE),MONTH(SOURCE[DATE])=CMonth))
VAR CLMonth = CALCULATE(COUNT(SOURCE[UCET]),FILTER(SOURCE,IF(CMonth=1,LMonth=12 && YEAR(SOURCE[DATE])=CYear-1,MONTH(SOURCE[DATE]) = LMonth && YEAR(SOURCE[DATE])=CYear)))

return DIVIDE(CCMonth-CLMonth,CLMonth,0)