OPEN-SOURCE SCRIPT
double Bollinger Bands
This Bollinger Band indicator is a technical analysis tool defined by a set of trendlines plotted Four standard deviations (two positively and two negatively) away from a simple moving average (SMA) of a security's price, but which can be adjusted to user preference.
Open-source script
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in publication is governed by House rules. You can favorite it to use it on a chart.
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