First of OI & Volume is not same. You can clear see in your nse option chain screen shot that BPCL May 510 put was not traded on that day as Volume is not showing any thing.
This is because post-market data is not streamed by the exchange. We are working on integrating this into our system. Kite will keep showing the last tick data received during the market for now.
@pankaj9 I'm pulling OI data using kite3.0 api, above screenshot is just for reference. Whenever I'm pulling OI data as Quote it has OI field. This OI data and NSE OI data is not matching.
This is clear discrepancy.
@sujith
Kite will keep showing the last tick data received during the market for now.