How To Compute Average True Range (ATR) in VB.NET?

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Public Function CalculateATR(values As List(Of Double), period As Integer) As Double
    Dim atr As Double = 0

    If values.Count >= period Then
        Dim trList As New List(Of Double)
        
        For i As Integer = 1 To values.Count - 1
            Dim tr As Double = Math.Max(values(i), values(i - 1)) - Math.Min(values(i), values(i - 1))
            trList.Add(tr)
        Next

        Dim sumATR As Double = 0
        For i As Integer = 0 To period - 1
            sumATR += trList(i)
        Next

        atr = sumATR / period
    End If

    Return atr
End Function

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Dim priceList As New List(Of Double) From {10.0, 10.5, 11.0, 10.8, 11.2, 11.5, 12.0, 11.7, 11.2, 11.0}
Dim period As Integer = 5

Dim atr As Double = CalculateATR(priceList, period)

Console.WriteLine("Average True Range (ATR): " & atr)