Available settings are as follows:
Source - highly recommended to use Close, but other options are available if you'd like to do some experimentation.
Source Rounding - the accuracy of price sampling; higher rounding will make your lines more visible at the expense of precision. It is highly recommended to use decimals.
Length (Array) - the overall lookback of the script (length of the array). This value shouldn't be higher than 500 if skip = 2, or 250 if skip = 1. If you'd like to reach further back into the past, I'd recommend switching timeframes instead of increasing this beyond 500.
Sampling Skip - how frequently the data is sampled. I wouldn't recommend going beyond 2, especially with the default settings.
Transparency Skip - you can think of it as "pencil hardness". The higher the skip, the bigger the imprint of a single level detection will be. Wouldn't recommend going beyond 10.
Color R, G, and B - you can use these settings to adjust the color of the lines.
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.