Count same values in most recent date

It depends on how you want to visualize it, if you just want to hard coded like this, or maybe you want a matrix, so you will have dimTable to show all the Value, then you get the CurValue=SELECTEDVALUE(dimTable[Value]), or you have a Date Table, then you need to take care the relationship as well.

CountValue=
VAR MaxMonth = MONTH(MAX(yourTable[Date]))
VAR CurValue = -1
RETURN
COUNTROWS(FILTER(yourTable,MONTH(yourTable[Date])=MaxMonth && yourTable[Value] = CurValue))

If you just want 9, do this, but you need to take care of your date format

CountValue1=

VAR MaxYear = YEAR(MAX(yourTable[Date]))

VAR MaxMonth = MONTH(MAX(yourTable[Date]))

VAR CurValue = -1

RETURN

SUMX(

     GROUPBY(yourTable,[Location]),

     COUNTROWS(FILTER(yourTable,Year(yourTable[Date])=MaxYear && MONTH(yourTable[Date])=MaxMonth && yourTable[Value] = CurValue)))