Keeping a watch over the trading activities of very large market participants have always been a favorite activity of traders. Indian stock exchanges, as far as we know, do not release a COT's report (Commitment of Trader's report). The nearest equivalent one can think of, is Participantwise report released by NSE each day. NSE report categorizes all participants in four groups, FII, DII, Pro (Proprietary traders – Brokers trading on their own account) and Clients (Traders who don't fall in the first three categories!)
Of these four categories, DIIs (comprising of mainly Mutual Funds, Banks, Insurance Companies, Pension Funds and other Domestic financial institutions) largely invest in long only products and their participation in Futures & options segment is not significant except in index options as hedging instruments. Proprietary traders are instrumental in providing liquidity in financial markets, so their positions should be seen more as market makers then market movers.That leaves the third major category of FII, who can and do influence F&O market movements hence we have decided to observe changes in FII derivative positions on daily basis.
This information can be presented in tables with columns for percentage changes etc. but Shai always maintains that a picture is worth a thousand words (or tables!) so we are using googlecharts for displaying the information in an easy to read format.
FII's are holding large positions in Index Futures, Index Options & Stock Futures but quite small positions in Stock options so only first three category charts are displayed.
There are two charts for each category, fist chart shows Total Outstanding Open Interest held by FIIs in that segment (both Long and Short) along with net daily changes (Contracts bought minus contracts sold). Second chart shows Net Open Interest (Long OI minus Short OI) with net daily changes.
These charts are auto updated when the datatables are updated on release of report by NSE, so you could bookmark the page for ready reference.