Plugging Row Value Into Measure Added Column

[Anonymous]

I am trying to find the first time one Measure has a lower value then a second measure (each measures only takes in Integers).  The way I thought of doing it was creating a table of integers and then just calculating each table with a filter at that value.  But I keep getting an Error.  How do I take the current value from the generateseries current row and plug it into a filter?

Here is my Dax (Ignore the Return, I'm just working on the Variables right now).

Test =
VAR _n = 180
VAR _CutDay = 0

VAR Main = [Main - DSA]

VAR _Table1 =
    GENERATESERIES ( 0, _n )
VAR _Table2 =
    ADDCOLUMNS (
        _Table1,
        "MainPer",
            CALCULATE (
                [MainRate],
                DaysSinceAssigned[DaysSinceAssigned] = Main
            )
                - CALCULATE (
                    [MainRate],
                    DaysSinceAssigned[DaysSinceAssigned] = Main - [Value]
                )
    )
VAR _Table3 =
    ADDCOLUMNS (
        _Table2,
        "SecPer", CALCULATE ( [SecondRate], DaysSinceAssigned[DaysSinceAssigned] = [Value] )
    )
RETURN
    2

[Anonymous]

@Anonymous 

Do you mean you want to find the first row number? But measures are not dynamic. You can convert the measures in to calculate columns. Can you share a short sample of your model, this would help a lot.

Paul Zheng _ Community Support Team

[DataZoe]

@Anonymous You may consider using FIRSTNONBLANK instead. FIRSTNONBLANK function (DAX) - DAX | Microsoft Docs

First Time Lower =
FIRSTNONBLANK ( table[Date], IF ( [ThisMeasure] < [OtherMeasure], 1, BLANK () ) )