Added parameters for source of highest and lowest line.
It's usefull for ultra volatile markets like cryptocurrencies and penny stocks. Using close price as source helps to filter out false breakout signals in turtle trading strategy.
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 a publication is governed by House Rules.
You can favorite it to use it on a chart.
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