AroonDownOverPeriod(SeriesCollection,Int32) Method

Calculates the Aroon Down indicator which measures the relative time since the last lowest low for all periods for which sufficient data is provided.

[Visual Basic]
Overloads Public Shared Function AroonDownOverPeriod( _
   ByVal sc As SeriesCollection, _
   ByVal lengthOfPeriod As Integer _
) As SeriesCollection

[C#]
public static SeriesCollection AroonDownOverPeriod( 
   SeriesCollection sc,
   int lengthOfPeriod
);

Parameters

sc

A collection of series objects. For example, to evaluate this indicator for two series you will need to pass a series collection containing this two series.

lengthOfPeriod

An integer which represents the length of the period over which the indicator will be iteratively evaluated.

Remarks

The indicator for each period will return a value between 0 and 100, where a higher value indicates that the lowest low was achieved more recently. Persistent values between 70 and 100 are said to indicate weakness in the asset and in conjunction with a low range (i.e. 0-30) in the Aroon Up indicator, indicates an downward trend.

Evaluation of the Aroon Down Indicator

The Aroon Down indicator for each period is given by:

100(n - (number of days since last highest high over n days))/n

where n is the number of days being considered (a reasonable default value for n is 14).

See Also

FinancialEngine Class  | FinancialEngine Members  | Overload List  | This indicator is a special case of FinancialAroonDownOverPeriod indicator and calculates the Aroon Down indicator for a single period.

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