Power bi Dax

Hi Korekar27 ，

Please try like:

Ranking =
VAR topproduct =
    RANKX ( ALL ( Products ), [Total Sales],, DESC )
VAR bottomproduct =
    RANKX ( ALL ( Products ), [Total Sales],, ASC )
VAR topcity =
    RANKX ( ALL ( 'India City Lat Long' ), [Total Sales],, DESC )
VAR bottomcity =
    RANKX ( ALL ( 'India City Lat Long' ), [Total Sales],, ASC )
VAR ranking =
    IF (
        CONTAINSSTRING ( SELECTEDVALUE ( Breakdown[Breakdown Fields] ), "Products" ),
        IF ( SELECTEDVALUE ( TopBottom[Value] ) = "Top", topproduct, bottomproduct ),
        IF ( SELECTEDVALUE ( TopBottom[Value] ) = "Top", topcity, bottomcity )
    )
VAR result = 
    IF (
        HASONEVALUE(Products) || HASONEVALUE('India City Lat Long'),
        IF ( ranking <= 'Ranking Option'[Ranking Option Value], [Total Sales] ),
        CALCULATE([Total Sales], ALL(Products), ALL('India City Lat Long'))
    )
RETURN result

Please try this and see if it works for your scenario. If not, please provide more details (No private data) about your data model.
How to provide sample data in the Power BI Forum

Best Regards,
Gao
Community Support Team

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If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

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