The trailing indicator. If ohlc4 becomes "Percent activate trail" above the entry price set by the value and entry date, then the trailing function is activated, which is considered as the maximum ohlc4 for the time in the position minus "Percent activate trail" multiplied by "koeff trail"

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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