Introductory Context
"The NSE option chain is a matrix showing all available call and put options for a specific underlying across all strike prices and expiry dates. It is published in real time on the NSE website and is the primary analytical tool for every options trader in India. Free, always available, and essential before any trade. "
Where to Find the NSE Option Chain
The NSE option chain is publicly available — free, real-time, no login required — at nseindia.com. The path:
• Go to nseindia.com
• Click on Market Data in the top navigation
• Select Derivatives → Options Chain
• Choose your underlying from the dropdown: NIFTY, BANKNIFTY, FINNIFTY, or any individual stock
• Select the expiry date you want to view
The chain refreshes automatically during market hours. Outside market hours it shows the previous session's closing data. Most brokers also display the option chain natively in their platform — Zerodha Kite has an option chain view accessible from the market watch, and Sensibull provides an enhanced chain with additional analytics.
Bookmark the NSE Option Chain
Make the NSE option chain your browser's first tab every morning. The URL for Nifty's option chain is nseindia.com/option-chain. During market hours, it updates in near-real-time. Before market hours, use it to review the previous session's closing OI data and identify the key strike levels that will matter when the session opens.
The Structure of the Option Chain — What You Are Looking At
The option chain is a matrix with strikes as rows and two sides: calls on the left and puts on the right. The current spot price of the underlying sits approximately in the centre. Moving up the strikes (higher numbers) from the centre takes you further OTM for calls and further ITM for puts. Moving down (lower numbers) takes you further ITM for calls and further OTM for puts.
The NSE option chain highlights the current ATM strike in a different colour (typically blue or yellow) to make the centre of the chain immediately visible. ITM call strikes are shown in one background colour (light blue typically) and OTM call strikes in another (white). On the put side, the colour scheme reverses.
The Option Chain at a Glance
Calls (CE) are on the LEFT side of the chain. Puts (PE) are on the RIGHT side. Strikes are in the CENTRE column, listed in ascending order (lowest at bottom, highest at top on the NSE website). The ATM strike is highlighted. ITM options for calls are shown in colour on the left; OTM puts are shown in colour on the right. This colour coding allows instant identification of the ATM level.
The Six Key Columns — What Each One Shows
The NSE option chain displays the following data for both calls and puts at each strike:
1. OI — Open Interest
The total number of outstanding (open) options contracts at this strike that have not yet been settled or closed. OI represents real committed capital — every contract in OI is a position that someone holds and has paid margin or premium to maintain. High OI at a specific strike indicates that a large number of market participants have taken positions at that level — a signal of institutional significance.
2. Change in OI
The change in open interest from the previous session's close to the current moment. Positive change = new positions being opened at this strike. Negative change = existing positions being closed or expiring. Reading change in OI alongside price movement gives you the four key OI scenarios covered in detail in Topic 4.4.
3. Volume
The total number of contracts traded at this strike in the current session (or since the last data snapshot). Volume measures activity and interest in today's session. High volume combined with rising OI indicates new position building. High volume combined with falling OI indicates position closing (unwinding).
4. IV — Implied Volatility
The market's implied expectation of future volatility derived from the option's current market price. Each strike has its own IV — and the pattern of IV across strikes (the volatility smile or skew) tells you about market expectations and demand for downside protection. ATM options typically have the lowest IV; OTM puts and OTM calls tend to have higher IV due to demand for tail risk protection.
5. LTP — Last Traded Price
The most recent price at which a contract executed — the premium. This is the number most retail traders focus on. It is important but tells you less than OI and IV combined.
6. Bid and Ask
The current best bid (highest price a buyer will pay) and best ask (lowest price a seller will accept) for each strike. The bid-ask spread tells you the execution cost and the liquidity of that specific strike. Always use the bid-ask to place limit orders — never the LTP alone.
The option chain is not a table of premiums. It is a real-time photograph of the market's collective intelligence — who is positioned where, at what cost, with what conviction. Every number in it is a signal. Learning to read all six columns simultaneously, rather than just looking at LTP, transforms the option chain from a reference table into an analytical tool.