https://www.definedgesecurities.com/blog/education/master-straddle-trading-with-opstra/

Watch the strategy - https://www.youtube.com/watch?v=JFNkoBNUb-Q&t=53s

The scanner is available in the Public Condition:

To scan this system/setup in your RZone, follow these steps:
Select “NSE” as the market.
Go to Public condition section, choose either:
 – Tejas Entry (Donchian + MACD) - For Scanner
 – Tejas Exit (Donchian Exit) - For Backtesting
Set the lookback period to 0.