Bollinger bands dynamic alerts

This triple Bollinger script is very useful for options traders to determine the trend condition. When the trend stays within 1 sigma limits it is termed as "congestion", breakout of congestion starts the "trending" phase and the big breakout termed "Blowout" happens when the underlying crosses the 2sigma and reaches 3 sigma limits in very short time at steep trend angles. The script provides dynamic alerts as soon as the underlying breaks out of these zones and enables options traders to stay in the trade longer.https://www.tradingview.com/chart/s97nMr1n/

版本注释:

Resolved issue of length change