This is a variation of an exponential moving average which follows the price pretty smoothly. Feel free to change the factor to adjust how closely it follows the price. I set the default to 0.2
Let me know if you want me to write code for any other indicators!
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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