StdDevS (Function)

The StdDevS function calculates a standard deviation for a sample of values.

Syntax

StdDevS(Price, Length)

Returns (Double)

A numeric value containing the sample standard deviation value of the specified bar.

Parameters

Name	Type	Description
Price	Numeric	Specifies the price information to be considered.
Length	Numeric	Indicates the length of time (in bars) to be considered.

Usage

This function returns a value representing how widely dispersed individual (Price) values are away from the mean average (using the same inputs) of a sample. To find the standard deviation, first find the variance of a sample and then take its square root.

Example

Assigns to Value1 the sample standard deviation of closing prices over the last 21 bars:

Value1 = StdDevS(Close, 21);

Assigns to Value2 the sample standard deviation of a 14 bar moving average of the High, calculated over the last 10 bars.

Value2 = StdDevS(Average(High, 14), 10);