Original script was based on Lazybear Indicator-WaveTrend-Oscillator-WT Script. I have added and modified some code to my personal liking.
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.