Open interest and volume realtime or delayed

[nithin]

Check this:

Is the live open interest(OI) data being provided by exchanges correct?

Everyday the open interest streamed by the exchanges at 3.29 pm to the end of data released at 4.30 pm has a huge variance (sometimes over 40%). Am I missing something? Does it make sense to track the live OI and use it as part of trading strategy?