OPEN-SOURCE SCRIPT
Updated Quarter Theory Lines with Box Around Each Key Level
Quarter Level Theory with Box Around Each Key Level, Credit to MrPresident for the original idea, revamped with additional touches for maximum profits.
Release Notes
Adds Quarter Levels at whatever increment you choose, also adds boxes around the key levels at increment that you choose. Credit to MrPresident for the original idea. 
Open-source script
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 publications is governed by House rules. You can favorite it to use it on a chart.
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Disclaimer
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