in the code by default its used tradingview default ta.pivothigh and ta.pivotlow function to get the high and low points.
it will generate recent 4 lines of high and low pivot points.
you can change the no of days for both highs and lows pivot points.
this script is not generating any buy or sell signals its just autodraw and connect 2 pivot points. so you dont have to do it manually.
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.