Syntax

Public function Performance(ByRef Data As Database, ByRef Source As Field, Optional ByVal FieldAliasName As String = "") As RecordSet

Overview
The Performance indicator calculates price performance as a normalized value or percentage.

Interpretation
A Performance indicator shows the price of a security as a normalized value. If the Performance indicator shows 50, then the price of the underlying security has increased 50% since the start of the Performance indicator calculations. Conversely, if the indicator shows 50, then the price of the underlying security has decreased 50% since the start of the Performance indicator calculations.

Class: Index

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)         'Performance indicator        Dim _indRecord As New  VTLGeneral.RecordSet()        Dim Idx As New VTLGeneral.Index()        _indRecord = Idx.Performance(DB,m_Open," ")         For i = 0 To DB.getRecordCount-1                output = output  &  CSTR(_indRecord.getValue("Performance", i) ) & vbcrlf        Next         GUI.MsgDialog(output) End Sub

See Also

• Relative Strength Index (RSI)
• Swing Index
• Trade Volume Index

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