
Here is a simple Excel tool to monitor the Live Nifty Options Open Interest. Apart from Monitoring the Open Interest of Puts and Calls you can also monitorthe change in Open Interest for both puts and callls across the strike prices for that day. Tested in Excel 2007 & Excel 2010.
Download link
http://www.4shared.com/file/3OIUZjP2/Nifty-options-open-interest-Oc.html