Bollinger Bands

Definition

Courtesy of www.stockcharts.com
Courtesy of www.marketscreen.com

Syntax

Bollinger(int period, double numStdDev)
Bollinger(IDataSeries inputData, int period, double numStdDev)

Returns upper band value
Bollinger(int period, double numStdDev).Upper[int barsAgo]
Bollinger(IDataSeries inputData, int period, double numStdDev).Upper[int barsAgo]

Returns lower band value
Bollinger(int period, double numStdDev).Lower[int barsAgo]
Bollinger(IDataSeries inputData, int period, double numStdDev).Lower[int barsAgo]

Parameters
period	The number of bars to include in the calculation
numStdDev	The number of standard deviations
inputData	Indicator source data (?)

Examples

// Prints the current upper band value of a 20 period Bollinger using default price type
double upperValue = Bollinger(20).Upper[0];
Print("The current Bollinger upper value is " + upperValue.ToString());

// Prints the current upper band value of a 20 period Bollinger using low price type
double value = Bollinger(Low, 20).Upper[0];
Print("The current Bollinger upper value is " + upperValue.ToString());

Source Code

You can open up the indicator source code via the NinjaScript Editor