Running Sum variant

Hi  MarcelBeug,

Already tried it and learn your code per row.

Here is the final code but the result still wrong

let
    fnRunningSum = (MyTable as table, MyDateColumn as text,  MyLeaveColumn as text, MyRunningSumColumnName as text, MyMaxValue as number) as table =>
    let
        SortedOnDate = Table.Sort(MyTable, {MyDateColumn, Order.Ascending}),
        RunningSum = List.Skip(List.Accumulate(Table.Column(MyTable,MyLeaveColumn),{0},(sum,value) => sum & {List.Min({MyMaxValue,List.Last(sum)+value})})),
        TableWithRunningSum = Table.FromColumns(Table.ToColumns(MyTable)&{RunningSum},Value.Type(Table.AddColumn(MyTable,MyRunningSumColumnName, each 0, type number)))
    in
        TableWithRunningSum,
    Source = Excel.Workbook(File.Contents("D:\Projects\Internal CRM\Leave Data.xlsx"), null, true),
    Sheet1_Sheet = Source{[Item="Sheet1",Kind="Sheet"]}[Data],
    #"Promoted Headers" = Table.PromoteHeaders(Sheet1_Sheet, [PromoteAllScalars=true]),
    #"Changed Type" = Table.TransformColumnTypes(#"Promoted Headers",{{"Date", type date}, {"Type", type text}, {"Debit/Credit", type number}}),
    RunningSum = List.Skip(List.Accumulate(#"Changed Type"[#"Debit/Credit"],{0},(sum,value) => sum & {List.Min({20,List.Last(sum)+value})})),
    TableWithRunningSum = Table.FromColumns(Table.ToColumns(#"Changed Type")&{RunningSum},Value.Type(Table.AddColumn(#"Changed Type","Running Sum", each 0, type number))),
    #"Added Index" = Table.AddIndexColumn(TableWithRunningSum, "Index", 1, 1),
    #"Grouped Rows" = Table.Group(#"Added Index", {"BookableName"}, {{"AllData", each fnRunningSum(_,"Date", "Debit/Credit", "RunningSum", 20), Value.Type(Table.AddColumn(#"Added Index","RunningSum", each 0, type number))}}),
    #"Expanded AllData" = Table.ExpandTableColumn(#"Grouped Rows", "AllData", {"BookableName", "Date", "Type", "Debit/Credit", "Running Sum", "Index", "RunningSum"}, {"AllData.BookableName", "AllData.Date", "AllData.Type", "AllData.Debit/Credit", "AllData.Running Sum", "AllData.Index", "AllData.RunningSum"}),
    #"Sorted Rows" = Table.Sort(#"Expanded AllData",{{"AllData.Index", Order.Ascending}})
in
    #"Sorted Rows"

When I tried to put the RunningSum into table it gives me wrong data. 

I filter by the BookableName, for A it's true start from 16, but if I filter by B it starts from 20.

I thought it still running sum from A's data before.

Please take a look on my file here.

Thanks,

Regards,

Connie