OPEN-SOURCE SCRIPT
Basis-Filtered Lower BB

Basis-Filtered Lower BB is a modified Bollinger Band indicator designed to help locate potential long entries only, based on EdgeTools’ findings around lower-band mean reversion.
Instead of treating Bollinger Bands as breakout, squeeze, or support/resistance tools, this script focuses on downside volatility extremes. According to the referenced finding, the strongest edge came from price closing below the lower Bollinger Band, where the move may be unusually extended relative to the asset’s recent volatility regime and later revert upward.
The indicator filters the lower Bollinger Band with an offset RMA basis to reduce steep near-vertical drops during volatility expansion. The final Filtered Lower BB line shows the higher value between the lower band and the basis filter, with optional SMA smoothing enabled by default.
Features:
This is a visual research tool for identifying lower-band penetration zones, not financial advice or a complete trading strategy.
Instead of treating Bollinger Bands as breakout, squeeze, or support/resistance tools, this script focuses on downside volatility extremes. According to the referenced finding, the strongest edge came from price closing below the lower Bollinger Band, where the move may be unusually extended relative to the asset’s recent volatility regime and later revert upward.
The indicator filters the lower Bollinger Band with an offset RMA basis to reduce steep near-vertical drops during volatility expansion. The final Filtered Lower BB line shows the higher value between the lower band and the basis filter, with optional SMA smoothing enabled by default.
Features:
- Built for studying potential long-only mean-reversion entries
- EMA-based lower Bollinger Band
- Fixed 2 standard deviation multiplier
- Separate lengths for lower band and basis filter
- Percentage-based basis offset, suitable for logarithmic charts
- Smoothed filtered output
- Raw lower band and basis filter hidden by default
This is a visual research tool for identifying lower-band penetration zones, not financial advice or a complete trading strategy.
开源脚本
秉承TradingView的精神,该脚本的作者将其开源,以便交易者可以查看和验证其功能。向作者致敬!您可以免费使用该脚本,但请记住,重新发布代码须遵守我们的网站规则。
免责声明
这些信息和出版物并非旨在提供,也不构成TradingView提供或认可的任何形式的财务、投资、交易或其他类型的建议或推荐。请阅读使用条款了解更多信息。
开源脚本
秉承TradingView的精神,该脚本的作者将其开源,以便交易者可以查看和验证其功能。向作者致敬!您可以免费使用该脚本,但请记住,重新发布代码须遵守我们的网站规则。
免责声明
这些信息和出版物并非旨在提供,也不构成TradingView提供或认可的任何形式的财务、投资、交易或其他类型的建议或推荐。请阅读使用条款了解更多信息。