Why have you chosen data of 19th July? It is the day when Nifty opened at ATH at 24853 and closed at 24525 travelling downwards all the way! Rather you should show us data from a different date when Nifty came back sharply after 10:15 to 11 am. Frequently we have seen it in recent charts. Might be Put Call ratio also have changed showing change in OI too? You have cited an example of trendy day, which are very rarely seen these days.
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