Change in OI missing

Developer API
1

Unable to fetch change in OI from API,
Please assist.

2

While fetching option chain data, we are expecting change in OI data as well which is not available.
Is it possible for you guys to add change in OI variable to option chain?

Please assist ASAP

3

OI changes every 3 minute from exchange, you would need to fetch data based on 3 min interval to see change in OI. NSE doesn’t have way of OI change every second.
Hope this helps

4

But here every 3 mins, the websocket should be updating the OI with new values if I’m not wrong. I think it comes in the efeed details in the websocket response structure