Get the category with maximum value

Hi,

MachineMaxPressure =
VAR LatestDate =
    MAXX ( 'Table C', INT ( 'Table C'[Timestamp] ) )
VAR MaxPressureonLatestDate =
    CALCULATE (
        MAXX (
            'Table C',
            IF (
                INT ( 'Table C'[Timestamp] ) = LatestDate,
                IF ( RELATED ( 'Table B'[Description] ) = "Pressure rate", 'Table C'[Value] )
            )
        )
    )
VAR TimeSeriesIDMaxPressureonLatestDate =
    LOOKUPVALUE (
        'Table C'[TimeseriesId],
        'Table C'[Value], MaxPressureonLatestDate
    )
VAR IDMaxPressureonLatestDate =
    LOOKUPVALUE (
        'Table B'[ID],
        'Table B'[timeseriesId], TimeSeriesIDMaxPressureonLatestDate
    )
VAR MachineMaxPressureonLatestDate =
    LOOKUPVALUE ( 'Table A'[Machines], 'Table A'[Id], IDMaxPressureonLatestDate )
RETURN
    MachineMaxPressureonLatestDate

Regards