OPEN-SOURCE SCRIPT
Updated Madrid Bollinger Bands Width
The contractions and expansions of the bands are represented by two different colors
Release Notes
This is an updated version of the Bollinger Bands Width Script, recompiled for Pinescript v. 3 and with an adjusted formula to normalize the output to percentage. 
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 publications is governed by House rules. You can favorite it to use it on a chart.
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