This indicator is based on showing the data, as much as possible, as it is, and not messing it up by calculating stuff. Calculation should be used to better understand what the data represents, and not to show beatiful things which are, in fact, not present.
You could, for example, take ADVN and DECL , calculate rma() moving averages and make a out of it. The result is very interesting when applied on the daily time frame, but not as useful for trading.
By the way, I recommend enabling this option:
Right click - Settings - Timezones / Sessions
Please check "Extended hours (Intraday Only)"
I could do it in code with the ticker() function, but I'm under the impression that then, free TV users would not be able to use the indicator.
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.