Category Volatility Published on 17/02/2014

Bollinger Bands Width

Description

Bollinger Bands Width is a technical analysis indicator derived from the standard Bollinger Bands indicator. Bollinger Bands are a volatility indicator which creates a band of three lines which are plotted in relation to a security's price. The Middle Line is typically a 20 Day Simple Moving Average. The Upper and Lower Bands are typically 2 standard deviations above and below the SMA (Middle Line). Bollinger Bands Width serve as a way to quantitatively measure the width between the Upper and Lower Bands. BBW can be used to identify trading signals in some instances.

John Bollinger, introduced Bollinger Bands Width in 2010 almost 3 decades after the introduction of his Bollinger Bands.

Source Code

modarkat

Joined on 25.12.2013

Distribution: Free
Language: C#
Trading platform: cTrader Automate
File name: Bollinger Bands Width.algo
Rating: 0
Installs: 6211
Modified: 13/10/2021 09:54

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Comments

sohoj · 9 years ago

Here is modified code.Coding seems easy in Calgo

Language: C#
Trading Platform: cAlgo, cTrader

using cAlgo.API;
using cAlgo.API.Indicators;

namespace cAlgo.Indicators
{
    [Indicator(IsOverlay = false, ScalePrecision = 5, AccessRights = AccessRights.None)]
    public class BollingerBandsWidth : Indicator
    {
        [Parameter("Period", DefaultValue = 20)]
        public int Period { get; set; }

        [Parameter("SD Weight Coef", DefaultValue = 2)]
        public int K { get; set; }

        [Parameter("MA Type", DefaultValue = MovingAverageType.Simple)]
        public MovingAverageType MaType { get; set; }

        [Parameter()]
        public DataSeries Source { get; set; }

        private BollingerBands _bollingerBands;

        [Output("diff", PlotType = PlotType.Histogram)]
        public IndicatorDataSeries Diff { get; set; }

        protected override void Initialize()
        {
            _bollingerBands = Indicators.BollingerBands(Source, Period, K, MaType);
        }

        public override void Calculate(int index)
        {
            Diff[index] = (_bollingerBands.Top[index] - _bollingerBands.Bottom[index]) / _bollingerBands.Main[index];
        }
    }
}

sohoj · 9 years ago

Is it possible to plot the this indicator as histogram instead of lines.Please do this.

Thanks in advance.

trader_ak · 10 years ago

Well done, thank you. :)

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