NSE puts up post market data on their website at the end of everyday. Is any of the data that is put up useful for an options trader and how should he look at it?
One can check for Open interest( OI) data provided by exchange to get a brief view on markets for near term.Check the below link.
For the strikes having highest OI for calls and puts can be considered as ranges for the near expiry.The call strike with highest OI and the put strike with highest OI can be taken as short term resistance and support levels.It is not any predefined rule or so but should be viewed only in generalized way and it may not hold in few cases.OI should not be considered on stand alone basis but along with other fundamental or technical factors.
One can also monitor the changes in OI along with IV (Implied volatility) values.