# Option Chain — StockMojo > Live NSE option chain with Greeks, IV, and Open Interest - Live page: https://stockmojo.in/option-chain - Content last updated: 2026-04-11 - Platform: StockMojo — free options analytics for Indian markets (NSE F&O) This is a machine-readable markdown mirror of the live tool page. The live page shows real-time NSE data during market hours (09:15-15:30 IST) and supports 200+ F&O symbols via per-symbol URLs like https://stockmojo.in/option-chain/banknifty. ## Frequently asked questions ### What is an option chain and how do you read it? An option chain is a tabular listing of every available call and put for a given underlying, organized by strike price and expiry. Each row shows the strike; calls are typically displayed on the left, puts on the right. Key columns include last traded price (LTP), bid/ask, volume, open interest, change in OI, and the option Greeks. Reading it well is the foundation of every options strategy. ### What columns matter most in the StockMojo option chain? The most actionable columns are Open Interest (where positions are concentrated), Change in OI (where new positions are being built or unwound), Implied Volatility (how expensive each strike is), and Delta (directional exposure). Volume helps confirm whether OI changes are real activity or stale positions. The StockMojo chain highlights ITM strikes and ATM strikes for quick visual scanning. ### How are Greeks (Delta, Gamma, Theta, Vega) calculated in real time? Greeks are computed from the Black-Scholes model using the live underlying price, the option's strike, time to expiry, current implied volatility, and the prevailing risk-free rate. StockMojo recalculates them every tick from the live NSE feed so the displayed values match real-time market conditions, not delayed snapshots. ### What does open interest in the option chain tell traders? OI shows where market participants have committed capital. A strike with very high call OI typically acts as resistance — it represents the largest concentration of call writers defending that level. The same logic applies to puts as support. Combined with change in OI, this is the single most-used signal in Indian options trading. ### How is implied volatility shown in the option chain? IV is displayed per strike, per option type. A symmetric IV across calls and puts at the same strike indicates a neutral market; a skew (puts more expensive than calls) indicates downside hedging demand. Watching IV across strikes reveals the volatility smile — a fundamental input for premium-selling strategies. ### What's the difference between live and historical option chain views? The live view shows real-time NSE data refreshed every few seconds during market hours. The historical view (Timeseries Option Chain) lets traders replay past option chain snapshots — useful for studying how OI shifted around past events, expiries, or news. Both views share the same column layout. ### How often does the option chain update? During market hours (09:15-15:30 IST), the StockMojo option chain updates on every NSE tick, typically every 1-3 seconds depending on activity. Greeks and IV are recalculated on each refresh. Outside market hours the chain shows the closing snapshot. ### What expiries are available for Nifty, BankNifty, and stocks? Nifty has weekly expiries every Thursday plus a monthly expiry on the last Thursday. BankNifty currently has a monthly expiry on the last Wednesday after the discontinuation of weekly contracts. F&O stocks have monthly expiries on the last Thursday. All available expiries appear in the StockMojo expiry selector for the chosen symbol. ## How to use the StockMojo Option Chain 1. **Pick a symbol** — Type or select Nifty, BankNifty, FinNifty, or any F&O stock in the symbol search at the top. 2. **Choose your expiry** — Use the expiry dropdown to switch between weekly and monthly contracts. The current week is selected by default. 3. **Identify the ATM strike** — Find the highlighted at-the-money strike — this is your reference point for reading OI and IV across the chain. 4. **Scan OI and Change in OI** — Look for strikes with the highest call OI (resistance) and put OI (support). Check Change in OI to see where new positions are being built right now. 5. **Cross-reference with Max Pain and PCR tools** — Open Max Pain and Put Call Ratio in adjacent tabs to confirm whether the OI picture aligns with broader sentiment. ## Related tools - [Max Pain](https://stockmojo.in/max-pain) — markdown: https://stockmojo.in/max-pain.md - [Open Interest](https://stockmojo.in/open-interest) — markdown: https://stockmojo.in/open-interest.md - [IV Chart](https://stockmojo.in/iv-chart) — markdown: https://stockmojo.in/iv-chart.md ## Glossary Terms used: strike-price, open-interest, implied-volatility, theta, gamma, expiry. Definitions: https://stockmojo.in/glossary