The script highlights times of low volatility
in the chart, when the Bollinger Bands
are inside the Keltner
Channel. A possible strategy could be to trrade the BB-breakout after a squeeze (see https://bit.ly/2Pa2xqd
for details). Some people like to trade the squeeze itself by guessing the dirction with market sentiment.
An option for highlighting times, when only one of the BB's is in the KC is included.