How to calculate the difference between columns in matrix

I almost found a solution for this one: 

As amitchandak suggested, I created an index column here is the data including the index

Then using this measure to calculate the difference from this thread (https://community.powerbi.com/t5/Desktop/Calculate-the-difference-between-two-columns-without-hard-coding/m-p/505691#M236099 )

Diff = 
VAR currIndex = MAX ( Data[Index] )
VAR currValue =
    CALCULATE (
        SUM ( Data[#] ),
        FILTER ( ALLSELECTED( Data ), Data[Index] = currIndex),
        VALUES ( Data[Type])
    )
VAR preValue =
    CALCULATE (
        SUM ( Data[#] ),
        FILTER ( ALLSELECTED( Data ), Data[Index] = currIndex -1),
        VALUES ( Data[Type])
    )
RETURN
    IF ( preValue <> BLANK (),currValue - preValue, "-" )

Here is the results:

This is almost what I am looking for, however, if we apply a filter on the period, it does not work:

This is because they are not consecutive periods ( it works fine if they are consecutive periods).

I tried to modify the measure to solve this issue:

It actually works fine when the filter is applied:

But it does not work when the filter is removed:

As you can see, it calcuate the fieernce between a certain column and the sum of all previous columns 

So, Is there any way to modify the measure to solve this issue (respecting the filter applied).

Thank you in advance.