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1st we need to observe where max oi is change.then we need to observe roc of iv.if it happens in a particular strick price then we can consider that strick price in our premium decay analysis.
2nd we also need to focus 3max oi otm strick price to identify overall trend.
If data change in intraday we can change our strick price.
Nitin Sir can confirm this.I am also a learner.