OPEN-SOURCE SCRIPT
Helly Efficiency Ratio
It is a variation of the Grimes Efficiency Ratio by Adam H. Grimes explained here:
adamhgrimes.com/a-new-tool-to-measure-trend-strength-the-grimes-efficiency-ratio/
Instead of calculating and then averaging the Donchian Channel Position I use the Keltner channel position, i.e. the HER gives you the average Keltner channel position over the last x days (Keltner channels +/-2.3 ATR20 on EMA20)
adamhgrimes.com/a-new-tool-to-measure-trend-strength-the-grimes-efficiency-ratio/
Instead of calculating and then averaging the Donchian Channel Position I use the Keltner channel position, i.e. the HER gives you the average Keltner channel position over the last x days (Keltner channels +/-2.3 ATR20 on EMA20)
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 publication is governed by House rules. You can favorite it to use it on a chart.
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