Request DAX For Ranked Order Date Tracking for Different Orders on Same Date

Hi etane ,
Thanks to Jihwan_Kim for the solution. Here is my solution
Here some steps that I want to share, you can check them if they suitable for your requirement.
Here is my test data:

Copy the following code into the advanced editor of Power Query

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45Wci4tLsnPTS1SMFTSUQooyk8pTS5RcASyXVJzMstSi1JTgGxDfUN9IwMjY6VYHaJ1GJGow4hkO4zIsMMYiw4jvP4wIVmHOc11AMPKlC5azEjWYmQA1RILAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Sales Table" = _t, Product = _t, Status = _t, #"Order Date" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Sales Table", type text}, {"Product", type text}, {"Status", type text}, {"Order Date", type date}}),
    #"Renamed Columns" = Table.RenameColumns(#"Changed Type",{{"Sales Table", "Customer"}}),
    #"Grouped Rows" = Table.Group(#"Renamed Columns", {"Customer"}, {{"Count", each _, type table [Customer=nullable text, Product=nullable text, Status=nullable text, Order Date=nullable date]}}),
    #"Added Custom" = Table.AddColumn(#"Grouped Rows", "Custom", each Table.AddIndexColumn([Count],"index",1,1)),
    #"Expanded Custom" = Table.ExpandTableColumn(#"Added Custom", "Custom", {"Product", "Status", "Order Date", "index"}, {"Custom.Product", "Custom.Status", "Custom.Order Date", "Custom.index"}),
    #"Removed Columns" = Table.RemoveColumns(#"Expanded Custom",{"Count", "Custom.Product"}),
    #"Changed Type1" = Table.TransformColumnTypes(#"Removed Columns",{{"Custom.Order Date", type date}})
in
    #"Changed Type1"

Create a measure

Measure = 
CALCULATE(
    DATEDIFF(MIN('Sales Table'[Custom.Order Date]),MAX('Sales Table'[Custom.Order Date]),DAY),
    ALLEXCEPT(
        'Sales Table',
        'Sales Table'[Custom.index]
    )
)

Final output

Best regards,

Albert He

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