WellesWilderSmoothing
Posted by Mohammad Rahhal, Last modified by Abdullah Almasharfah on 15 December 2018 12:26 PM

Overview
The Welles Wilder's Smoothing indicator is similar to an exponential moving average.

Interpretation

The indicator does not use the standard exponential moving average formula. Welles Wilder described 1/14 of today's data + 13/14 of yesterday's average as a 14-day exponential moving average.

Class: MovingAverage


Syntax

Public function WellesWilderSmoothing(ByVal Source As Field, ByVal Periods As Integer, Optional ByVal FieldName As String="") As RecordSet

 

Return Type Returns object of type Recordset
Default Field Name(s) WellesWilderSmoothing


Sample

Public Sub main()

        'Variables

        Dim _symbolInfo As VTLGeneral.CSymbol=ClientCode.GetSymbolByName("GOLD")

        Dim DB As New VTLGeneral.Database()

        Dim rsOHLCV As New VTLGeneral.RecordSet()

        Dim RecordCount As Integer

        Dim m_Recordset As VTLGeneral.RecordSet

        Dim _historyData As object()

        Dim output As String

        Dim Record As Integer

        Dim m_Date As VTLGeneral.Field

        Dim m_Open As VTLGeneral.Field

        Dim m_High As VTLGeneral.Field

        Dim m_Low As VTLGeneral.Field

        Dim m_Close As VTLGeneral.Field

        Dim j As Integer = 0

        Dim i As Integer = 0

        Dim _recordCount As Integer = ClientCode.Bars(_symbolInfo.ID,VTLGeneral.ENUM_PERIOD.Day)
        

        m_Recordset = DB.CreateRecord

        m_Open = New VTLGeneral.Field

        m_High = New VTLGeneral.Field

        m_Low = New VTLGeneral.Field

        m_Close = New VTLGeneral.Field
 

        DB.RecordCount = _recordCount

        RecordCount = _recordCount
 

        'Initialize Recordsets

        m_Open.initialize(_recordCount-1, "Open")

        m_High.initialize(_recordCount-1, "High")

        m_Low.initialize(_recordCount-1, "Low")

        m_Close.initialize(_recordCount-1, "Close")

        'load high, low ,open and data

         _historyData = ClientCode.GetChartHistory(_symbolInfo.ID, VTLGeneral.ENUM_PERIOD.Day,VTLGeneral.ENUM_HISTORY_TYPE.HIS_HIGH, _recordCount)
 

         For i  = 0 To _recordCount-1

                m_High.setValue(i,_historyData(i))

         Next
 

        _historyData = ClientCode.GetChartHistory(_symbolInfo.ID, VTLGeneral.ENUM_PERIOD.Day,VTLGeneral.ENUM_HISTORY_TYPE.HIS_LOW, _recordCount)
 

        For i  = 0 To _recordCount-1

                m_Low.setValue(i,_historyData(i))

        Next 


        _historyData = ClientCode.GetChartHistory(_symbolInfo.ID, VTLGeneral.ENUM_PERIOD.Day,VTLGeneral.ENUM_HISTORY_TYPE.HIS_OPEN, _recordCount)
 

        For i  = 0 To _recordCount-1

                m_Open.setValue(i,_historyData(i))

        Next 


        _historyData = ClientCode.GetChartHistory(_symbolInfo.ID, VTLGeneral.ENUM_PERIOD.Day,VTLGeneral.ENUM_HISTORY_TYPE.HIS_CLOSE, _recordCount)
 

        For i  = 0 To _recordCount-1

                m_Close.setValue(i,_historyData(i))

        Next 
 

        m_Recordset.addField(m_Open)

        m_Recordset.addField(m_High)

        m_Recordset.addField(m_Low)

        m_Recordset.addField(m_Close)
 

        'WellesWilderSmoothing

        Dim _indRecord As New VTLGeneral.RecordSet()

        Dim MA As New VTLGeneral.MovingAverage()

        _indRecord = MA.WellesWilderSmoothing(m_High,14,"")
 

        For i = 0 To DB.getRecordCount-1

                output = output  &  CSTR(_indRecord.getValue(_indRecord.getName(1), i) ) & vbcrlf

        Next
 

        GUI.MsgDialog(output)

 

End Sub

 


See Also


Back to VTL Server Script Index

 

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