Divergences are created by the difference in price due to the incredible changes in TRY value. The candle colors turn to grey when the forex exchange is closed; this is done to show you that the quote currency value won't change.
levels are also possible to be drawn.
Options to configure are changing the quote pair, colors, and turning the divergences on or off.
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.
Sorry if I haven't replied to your message yet, I'm a bit backlogged :)