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.
Syntax
'Declaration Public Overloads Shared Function AroonDownOverPeriod( _ ByVal sc As SeriesCollection, _ ByVal lengthOfPeriod As Integer _ ) As SeriesCollection
'Usage Dim sc As SeriesCollection Dim lengthOfPeriod As Integer Dim value As SeriesCollection value = FinancialEngine.AroonDownOverPeriod(sc, lengthOfPeriod)
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).
Requirements
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
See Also