Visual Basic (Declaration)  

Public Overloads Shared Function ExtremeValueDSignal( _ ByVal seriesName As String, _ ByVal s As Series, _ ByVal extremeLow As Double, _ ByVal extremeHigh As Double, _ ByVal noOfPeriods As Integer, _ ByVal method As Integer, _ ByVal lengthOfMA As Integer _ ) As Series 
Visual Basic (Usage)  Copy Code 


C#  

public static Series ExtremeValueDSignal( string seriesName, Series s, double extremeLow, double extremeHigh, int noOfPeriods, int method, int lengthOfMA ) 
Parameters
 seriesName
 The name of the series which will be displayed on the chart, i.e. its label.
 s
 A financial series where the first element is the closing price in the last trading period, the second term is the closing price in the previous trading period and so on.
 extremeLow
 This is the level at which the Stochastic is believed to indicate an oversold level. The Stochastic always lies between 0 and 100, and a suggested extreme low value to take is 20.
 extremeHigh
 This is the level at which the Stochastic is believed to indicate an over brought level. The Stochastic always lies between 0 and 100, and a suggested extreme high value is 80.
 noOfPeriods
 An integer which represents the number of periods used over which the closing price is compared.
 method
 Determines the methods used for the evaluation of the moving average in accordance
with the following key:
 1 = Simple moving average
 2 = Geometric moving average
 3 = Linearly weighted moving average
 4 = Exponentially Weighted Moving average within smoothing fact set to be 0.5.
For further details concerning the definition of these moving averages please see the accompanying PDF documentation or the API documentation for SimpleMovingAverage.
 lengthOfMA
 The number of periods over which the moving average is considered.
Return Value
1, 0, 1  this method returns either 1, 0, 1 to indicate that either a sell, no action or buy signal was generated.
Note, that the general ides of this approach is to seek points which are oversold or over brought
levels which are turning.
Methodology
Buy when the Oscillator the Stochastic %D falls below a specific level (e.g. 20) and then rises above that level. Sell when the Oscillator rises above a specific level (e.g. 80) and then falls below that level. This approach is the preferred method of the Stochastics original creator George Lane.