Messing around with this two point selecting ability I recently learned about from Tradingview's CAGR. Here is a script that will tell you changes in volume(obv)/price, volume to price change ratio, and the average volume to price change ratio for the length you define in the settings menu. You can use this to compare the ratio of a current pump to an older pump to help assess the strength of a movement. Enjoy!
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 publication is governed by House rules. You can favorite it to use it on a chart.
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