Intraday volume integral, start to sum the volume each bar on beggining of the seesion until marked close. And next day again and again. Compared by a mix of MA to flat spikes, this indicator show bar by bar the actual percent of the avarage volume. High percent at the middle day suggest that something is going to happen.
Open-source 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.
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