There is also an input and when you check mark the check box, you can tweak the numbers and the two custom numbers will totally override the default ones to make it suite your needs.
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.