DAX Help - Select Data Averaging

[Anonymous]

Community, 

I would like to find the average of the last 3 values in the 'data' column for each 'test config' in the table below. These would be the last 3 found in the 'iteration' of the data.

I have tried this solution, but it is not working correclty, I'm not sure what I'm missing.

AVG DATA =
CALCULATE (
    AVERAGE ( Table[Data] ),
    FILTER (
        ALL ( Table ),
        Table[Iteration] <= MAX ( Table[Iteration] )
            && Table[Iteration]
                > MAX ( Table[Iteration] ) - 3
    )
)

Any help is appreciated!!

[amitchandak · Accepted solution]

I did one change and seems to be working

AVG DATA = 
CALCULATE (
    AVERAGE ( Tab[Data] ),
    FILTER (
        ALL ( Tab[Iteration] ),
        Tab[Iteration] <= MAX( Tab[Iteration] )
            && Tab[Iteration]
                > (MAX(Tab[Iteration]) - 3)
    )
)

.

ALL ( Tab ) -- > ALL ( Tab[Iteration] )

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