Starter
Read the chain and practise.
₹299/ month7 days free for new accounts
- Dashboard
- Strike Matrix
- Option Chain
- Option Chain Graph
- Back-test
NIFTY · BANKNIFTY · SENSEX · MCX commodities
See where option writers are defending, before price gets there.
Option Decode is an option-chain analytics terminal for NIFTY, BANKNIFTY, SENSEX and MCX commodities. It reads the whole chain for you: which strikes are being written, which walls are real and which are just big numbers, and how pressure is shifting minute to minute.
New accounts get their first 7 days free from the day they register, with every screen in every plan open. Then Starter is ₹299/month: the Dashboard, Strike Matrix, Option Chain, Option Chain Graph and Back-test.
NIFTY · 3 Nov expiry · OI wallsLast close
- Open interest
- Added today
- Spot
- 23,400Strongest resistance: 103 lakh open, +21 lakh today.
- 22,000Strongest support: 138 lakh open, +40 lakh today.
- 23,500More calls open than 23,400, but its premium rose as they were added, which reads as buying rather than writing. So 23,400 still ranks first.
The market right now
Sentiment and sectors, at a glance
Market closed · last reading 30 Oct, 15:41 IST
Option-chain bias · NIFTY
Bullishbullish 65 · bearish 35
Bullish pressure outweighs bearish across the whole option chain.
Put-call ratio · NIFTY
1.60▲ rising, last 5 min
Open puts divided by open calls, across the whole chain. Above 1, more puts are open than calls.
India VIX
15.45▲ 2.2% today
The market's expected volatility over the next 30 days. Lower means cheaper premiums and a narrower expected range.
Three separate readings, shown side by side on purpose. They measure different things and can disagree. Derived from option-chain positioning; not a forecast or a recommendation.
NSE sector indices2 of 12 up · strongest first
- Nifty IT+2.32%32,606.90
- Nifty Pharma+1.55%27,124.85
- Nifty Financial Services+0.03%24,712.20
- Nifty Bank−0.41%54,686.95
- Nifty Oil & Gas−0.47%10,303.25
- Nifty Metal−0.54%11,784.90
- Nifty FMCG−0.62%43,609.20
- Nifty Realty−0.72%813.90
- Nifty Auto−0.87%25,422.70
- Nifty PSU Bank−0.93%8,234.85
- Nifty Energy−0.97%34,957.90
- Nifty Media−1.46%1,631.25
Inside the terminal
Three screens, one question each
/app?view=dashboard
Pressure, chain bias and the strongest support and resistance, ranked by how much writing sits at each strike.
/app?view=option-chain
Chart any strike's call and put OI change against spot, and see walls flagged even when they sit outside today's expected range.
/app?view=paper
Place the trade on the live chain with no money at risk. Stop and target are tracked for you, tick by tick.
Pricing
Subscribe to the plan you need. Add the research tools when you want them.
Every plan covers NSE and BSE indices and MCX commodities. Plans differ only in which screens you can open.
Pro
The full analytics suite.
₹1,499/ monthNo extra charges
- Everything in Starter, plus:
- Stock Option Chains
- Black-Scholes model
- Replay Lab
- Back-test Pro, with broker-style margin
- Alerts, including push notifications
Elite
For active stock-options traders.
₹2,999/ monthNo extra charges
- Everything in Pro, plus:
- Screener, across 200+ F&O stocks
New accounts get 7 days free from the day they register, with every screen in every plan open, then subscribe to the plan they want - Starter is ₹299/month. Accounts opened before 22 September 2026 are free until 1 October 2026.Pay from the Billing section of your account by UPI, card, net banking or wallet, through Razorpay. A plan you buy during your free days starts when they end. Nothing renews by itself.Screener seats are limited.
Support
Talk to a person
Questions about a plan, a payment or your account. Monday to Friday, 9:30 AM to 5:30 PM IST.