Sub main()
 
    Dim i           As Long
    Dim vRet()      As Variant
    Dim rngBereich  As Excel.Range
     
    With Tabelle3: Set rngBereich = .Range(.Cells(5, 3), .Cells(.Cells(.Rows.Count, 1).End(xlUp).Row, 3)): End With
     
    ReDim vRet(1 To rngBereich.Rows.Count)
     
         
        For i = 5 To UBound(vRet) Step 1
            vRet(i) = WorksheetFunction.Average(Range(rngBereich.Cells(i, 1).Offset(0, -1), rngBereich.Cells(i - 4, 1).Offset(0, -1)))
        Next i
     
        rngBereich.Cells(1, 1).Resize(UBound(vRet)).Value = Application.Transpose(vRet)
     
     
End Sub