Here is the link to download excel sheet to keep a track on the nifty options open interest and do analysis on it. This is how you can do the analysis using open interest data of nifty options.
Download from here.
Sheet will auto refresh itself every 5 minutes. You will have to disable security warning, else it will not refresh the data.
Next week’s analysis: I am seeing some correction in nifty future before further up-move, but trading strategy still remains the same buy on every decline and also one has to be stock specific in this market. Indian rupee is likely to appreciate against euro and pound, but may remain sideways due to better than expected US GDP data that came last week. Article published on 28 October 2012.
About 
How can I get OI excel sheet for current month i.e. for June 2013