Countby price range

Mente73,

This approach uses a disconnected table named Segmentation:

Create measure:

Purchase Count Segmented = 
SUMX (
    Segmentation,
    COUNTROWS (
        FILTER (
            Transactions,
            Transactions[Amount] > Segmentation[Range Min]
                && Transactions[Amount] <= Segmentation[Range Max]
        )
    )
)

Result:

You can specify the additional filters on Platform, TransactionType, and PaymentBy either in filters or adding them to the FILTER function. Specifying these as filters would enable the measure to be generic and thus reflect any user-specified filters.