boll_sig

Function Name: boll_sig

Tags: Bands

Category: Trend

The Bollinger Bands indicator is one of the most commonly used technical indicators. It draws two bands that are plotted usually two standard deviations above and below a moving average. An upper band is plotted a specified number of standard deviations above this average and a lower band is plotted a specified number of standard deviations below the average.

The Bollinger Bands indicator combines the trend identifying aspects of a moving average with a dynamic factor, each market's own volatility, to plot an envelope. The distance between the bands is, therefore, a reflection of volatility. During sideways periods, prices reaching the bands may indicate overbought or oversold conditions. Strong movement up through the upper band or down through the lower band may indicate the beginning of a trend. A buy/sell signal occurs when a certain number of bars (can be set with parameter NBars) is below/above the lower/upper border of the Bollinger Band.

 

Author:   John Bollinger

Link:       http://www.investopedia.com/terms/b/bollingerbands.asp

 

Period
	Default Value: 20  |  Minimum: 1  |  Maximum: 9999
	Type: Numeric
Deviation
	Default Value: 2  |  Minimum: 0  |  Maximum: 100
	Type: Numeric
NBars
	Default Value: 1  |  Minimum: 1  |  Maximum: 100
	Type: Numeric
ShowTraderBar
	Default Value: 0
	Type: Boolean
ShowTraderMark
	Default Value: -1
	Type: Boolean
ShowEachOccurence
	Default Value: 0
	Type: Boolean
UseBullishSignals
	Default Value: -1
	Type: Boolean
UseBearishSignals
	Default Value: -1
	Type: Boolean