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.
By switching different time periods, such as 5 minutes, 15 minutes, 30 minutes, 1 hour, etc., to achieve the K-line search for suitable trend indication assistance.