FinanceChart.addBollingerBand

addBollingerBand(period, bandWidth, lineColor, fillColor)

Adds a Bollinger band to the main chart.

Argument	Default	Description
period	(Mandatory)	The period to compute the band.
bandWidth	(Mandatory)	The half-width of the band in terms multiples of standard deviation. Typically 2 is used.
lineColor	(Mandatory)	The color of the lines defining the upper and lower limits.
fillColor	(Mandatory)	The color to fill the regional within the band.

An InterLineLayer object representing the band created.