The indicator uses a time range and another instrument for time reference, so that it works in the time zone you care about. I have set the default to SPX500USD since it is in EST ( SPX , ES and many futures are on Chicago time and opening range gets confused). You can change the reference instrument in the settings.
You can also change the multipliers and use other values instead of 1.272 and 1.618 for Fib extensions.
TradingView has a limit as to how many objects an indicator can create so if you want to go back further for visual backtesting - use the replay tool - it will be able to draw up to the time you selected within its limits.
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 publication is governed by House rules. You can favorite it to use it on a chart.
I'm a passionate software engineer and a trader. I love making trading tools. Follow me if you want to be kept up to date.
Also on:
Disclaimer
The information and publications are not meant to be, and do not constitute, financial, investment, trading, or other types of advice or recommendations supplied or endorsed by TradingView. Read more in the Terms of Use.