The first one called RSIs is a comparison between the Relative strength index of the Accumulation/Distribution (and the On Balance Volume) and the normal price, to analyze the differences in momentum between the price with volume and without.
The second one, called Dock, is similar except for the fact that the lines are smoothed using the hull moving average formula, this mode is great to signal entries and for reversal analyzing.
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.