﻿ ExtremeValueKSignal(Series,Double,Double,Int32) Method
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 dotnetCHARTING Namespace > FinancialEngine Class > ExtremeValueKSignal Method : ExtremeValueKSignal(Series,Double,Double,Int32) Method

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.
Implements a general framework for producing extreme value trading signals using Stochastic indicators.

# Syntax

Visual Basic (Declaration)
```Public Overloads Shared Function ExtremeValueKSignal( _
ByVal s As Series, _
ByVal extremeLow As Double, _
ByVal extremeHigh As Double, _
ByVal noOfPeriods As Integer _
) As Series```
Visual Basic (Usage)Copy Code
``````Dim s As Series
Dim extremeLow As Double
Dim extremeHigh As Double
Dim noOfPeriods As Integer
Dim value As Series

value = FinancialEngine.ExtremeValueKSignal(s, extremeLow, extremeHigh, noOfPeriods)``````
C#
```public static Series ExtremeValueKSignal(
Series s,
double extremeLow,
double extremeHigh,
int noOfPeriods
)```

#### Parameters

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.

#### 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.

# Remarks

Note, that the general ideea of this approach is to seek points which are oversold or over brought levels which are turning.

#### Methodology

Buy when the the Stochastic %K 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.