Standard starts at day open 0 GMT , however there are some exchanges for eg. Deribit that have seen they use a different time period to begin calculations. This is useful in such cases.
You need to specify the hours & minutes of the that want to use. will be hidden on any timeframe higher than specified "Highest Visible Timeframe".
Also a big thanks to u/mortdiggiddy as he helped with this script.
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.