///<summary>
/// Variable Moving Average
///</summary>
///<param name="pNav">Navigator</param>
///<param name="pSource">Field Source</param>
///<param name="periods">Periods</param>
///<param name="Alias">Alias</param>
///<returns>Recordset</returns>
public Recordset VariableMovingAverage(Navigator pNav, Field pSource, int periods, string Alias)
{
Oscillator OS = new Oscillator();
int Record;
int RecordCount = pNav.RecordCount;
Field Field1 = new Field(RecordCount, Alias);
//CMO must be overwritten
Recordset Results = OS.ChandeMomentumOscillator(pNav, pSource, 9, "CMO");
const int Start = 2;
pNav.Position = Start;
for (Record = Start; Record < RecordCount + 1; Record++)
{
pNav.MovePrevious();
double PrevVMA = Field1.ValueEx(pNav.Position);
pNav.MoveNext();
double CMO = Results.ValueEx("CMO", pNav.Position) / 100;
double Price = pSource.ValueEx(pNav.Position);
if (CMO < 0)
{
CMO = -1 * CMO;
}
double VMA = (CMO * Price) + (1 - CMO) * PrevVMA;
Field1.Value(pNav.Position, VMA);
pNav.MoveNext();
}//Record
pNav.MoveFirst();
Results.AddField(Field1);
return(Results);
}
/// <summary>
/// Action to be executd for calculating indicator
/// </summary>
/// <returns>for future usage. Must be ignored at this time.</returns>
protected override bool TrueAction()
{
// Validate
int size = _chartPanel._chartX.RecordCount;
if (size == 0)
{
return(false);
}
int paramInt1 = ParamInt(1);
if (paramInt1 < 1 || paramInt1 > size / 2)
{
ProcessError("Invalid Periods for indicator " + FullName, IndicatorErrorType.ShowErrorMessage);
return(false);
}
// Get the data
string paramStr0 = ParamStr(0);
Field pSource = SeriesToField("Source", paramStr0, size);
if (!EnsureField(pSource, paramStr0))
{
return(false);
}
Navigator pNav = new Navigator();
Recordset pRS = new Recordset();
pRS.AddField(pSource);
pNav.Recordset_ = pRS;
// Calculate the indicator
Oscillator ta = new Oscillator();
Recordset pInd = ta.ChandeMomentumOscillator(pNav, pSource, paramInt1, FullName);
// Output the indicator values
Clear();
for (int n = 0; n < size; ++n)
{
AppendValue(DM.GetTimeStampByIndex(n), n < paramInt1 ? null : pInd.Value(FullName, n + 1));
}
return(_calculateResult = PostCalculate());
}
