I call it 'Range Change' or just RVC.
RVC will show the percentage of change between the selected time range and the previous day for the same time range.
This will allow us to see if the is increasing or decreasing today compared to the previous day by a specific time range that we set in PVC settings. It can do more than just premarket, you can use it for any time range of your interest which will work on 24hours assets like crypto and forex.
RVC visualizes the incremental of the using increasing size columns giving you a better view of how the changes compared to the past. The column shows the accumulated from when the time range started.
As an extra feature, it will also show the percentage of change outside the time range (can be disabled from settings).
In addition, RVC is also designed to work on real-time data.
Example of BTCUSDT (24-hour asset) with 'outside the time range', enabled (purple columns):
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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.