Can I have an example of how to use MaxPositionProfit?

For example, I would like to exit at the close of a bar if the max position profit is greater than X.

Here is some code with my attempt:

Sub MA_CROSS_Exits (SLen As Integer, LLen As Integer, MPTargetLX as Integer, MPTargetSX as Integer)
    Dim ShortAve As BarArray
    Dim LongAve As BarArray
    Dim MPP As BarArray
   
    ShortAve = Average(Close, SLen,0)
    LongAve = Average(Close, LLen,0)
     If Close > LongAve  Then
        Buy("BuyEnt",1,0,Market,Day)
    End If
    If Close < ShortAve  Then
        Sell("SellEnt",1,0,Market,Day)
    End If
  
'Exit - Trailing Early Profit Target

    MPP = MaxPositionProfit
   
    If MPP > MPTargetLX Then
        ExitShort("eSX","BuyEnt", 1, 0, CloseExit, Day)
        MPP = 0
    End If
    If MPP > MPTargetSX Then
        ExitLong("eLX","SellEnt", 1, 0, CloseExit, Day)
        MPP = 0
    End If
   
End Sub