Open Interest
Call
95.93L+26.9%
+20.31L
Prev 75.62LPut
68.40L+33.3%
+17.10L
Prev 51.30LThe bar is drawn to the number it states. Solid is yesterday, colour is what was added today.
The Advanced Option Chain
The option chain that tells a story.
See positions build. Follow the premium. Read the levels. Visual OI, volume and build-up bring the meaning behind each strike into view.
New to option chains?Read the guide to every cell, from Open Interest to Build-up.Strike
ATM24100Spot 24,096.40
The strike the chain centres on, with spot marked against it.
Build-up
Short Buildup
+20.31L+26.9%
Price down, Open Interest up
Price against Open Interest sorts every strike into one of four stories. Hover the grid.
Volume
Call 12.80LPut 9.60L
Traded quantity today, split by side, with the pace of the last hour.
Bid · Ask
128.25Spread 0.20128.45
Where buyers and sellers stand right now, and how tight the gap is.
Support & Resistance
24200OI ResistanceVOL Resistance
24100ATMGamma Flip
24000OI SupportVOL Support
Zones from the heaviest Open Interest and volume, one strike at a time.
Auto alert24000 Put · Long BuildupOpen Interest +33.3% in 15 min, premium rising
Beyond the chain
Go deeper, one question at a time.
Read positioning across strikes and time, then explore the priced move, strategy risk and your wider workspace.
02Profile · Window · Max pain
Open Interest
Where the positions are standing.
Compare Call and Put Open Interest across strikes to see where positions are concentrated. Switch from the standing profile to a chosen time window to separate fresh additions from positions being closed.
Strike PCR and max pain stay alongside the profile, giving each concentration more context.
Strike-by-strike positioning
Illustration03Build-up · Replay
OI Spurts
Catch the strike that is moving fast.
Follow each option leg through a map of price and Open Interest changes. Every strike is measured against its own book, so changes in quieter contracts remain visible alongside the busiest ones.
Use the timed trail and session replay to trace how a contract moved between the four build-up states.
Price × Open Interest
Illustration04Strike × time
OI Heatmap
Open Interest across strikes and time.
Read positioning across strikes and time in a single matrix. Choose Open Interest or build-up: colour shows the price change, while stripes reveal contracts added at each reading.
Switch between Wide and Compact tiles, then inspect a cell to see the detail behind the pattern.
Positioning over time
Illustration05Crossovers · Attribution
PCR
The Put-Call Ratio, through the session.
Track the Put-Call Ratio through the session, with crossings of 1.00 clearly marked. See when the balance of Open Interest shifts and use Call and Put attribution to understand which side moved it.
Keep spot and positioning levels alongside the ratio to read the change in context.
The balance of positions
Illustration06Premium · Expected move
Straddle
What the market is charging for a move.
Follow the combined premium of the ATM Call and Put as it expands or contracts through the session. Compare it with the opening reading and explore the move being priced into the options.
The expected move, breakeven band and max pain reference bring more context to the premium.
Combined ATM premium
Illustration07Flip · Walls
GEX Levels
Gamma exposure, strike by strike.
Explore gamma exposure across strikes, with the zero-gamma level, net regime and Call and Put concentrations in view. Distinguish gamma walls from Open Interest walls when comparing potential positioning effects.
GEX models dealer positioning; exchange data cannot confirm the underlying assumption.
Gamma across strikes
Illustration08Percentile · Rank
Implied Volatility
How big a move are options pricing?
Compare the move priced into options with recent realised movement. Read ATM implied volatility in points, by expiry and per day, then explore how IV changes across strikes and expiries.
A year of IV Rank and IV Percentile puts the reading in context, with India VIX alongside NIFTY.
The volatility term structure
Illustration09Payoff · What-if
Strategy Builder
See the payoff before you trade.
Build a position leg by leg using option-chain premiums. Choose strikes, expiries, Calls or Puts, direction and lots, then see the combined payoff, breakevens, maximum profit and loss, and Greeks.
Adjust the target price, date or IV to explore how projected P&L changes across scenarios.
A defined-risk payoff
Illustration10Three views
Options Scanner
Find where the action is.
Compare active contracts across F&O underlyings without opening every chain. Bring price moves, OI changes, build-up and volume together, then narrow the results with your own ALL or ANY conditions.
Switch to underlying comparisons for implied versus realised volatility, expected move, term structure and skew.
Across the market
Illustration11Every future
Market Flow
See which side the market moved on.
Every F&O underlying read from its future and sorted bullish or bearish once it moves past a floor, filed under Long Buildup, Short Buildup, Short Covering or Long Unwinding, with the strongest on each side shown in full.
Each pick carries the session’s futures line, the zone where positions were added fastest, and the heaviest put and call Open Interest either side of spot.
From every future to a side
Illustration12One screen
Trader Cockpit
Your own wall of widgets.
Bring your analysis into one workspace with 28 widgets for positioning, levels, volatility and more. Arrange, resize or maximise the views you need around a shared symbol and expiry.
Link strikes across widgets, save layouts or start from a template, with a dedicated layout for your phone.
One symbol, connected views
IllustrationQuestions
Good to know
Still stuck? The guides explain every number, and the options FAQ covers the basics.
Are Sahi Tools free?
Yes. Every tool on this page is free to use. Trading needs a Sahi account, which is separate, and brokerage and statutory charges apply to trading.
How do I open a Sahi account?
Account opening is on sahi.com. Choose Open FREE Demat there and follow the steps. Brokerage and statutory charges apply to trading.
Can I place orders from these tools?
No. Sahi Tools is an analysis terminal. It does not accept orders and does not give investment advice.
Do the tools tell me to buy or sell?
No. The tools describe states such as bullish, bearish, neutral or rangebound, and give levels as possibilities. What to do with a reading is always your decision.
Where does the data come from?
Your browser reads market data directly from the SahiCharts API and does the calculations on your device. If the live feed cannot be reached, the tools fall back to stored snapshot data and say so.
Which instruments are covered?
NIFTY, BANKNIFTY, the other indices and the F&O stock list, more than 215 underlyings in all. Most tools open on any symbol, for example /open-interest/reliance.
How often does the data update?
By default the live chain refreshes about every five seconds during market hours. Intraday history comes from snapshots saved through the session, which is what lets you replay the session.
What is the Trader Cockpit?
A single screen where you arrange widgets from the other tools, such as snapshot, key levels, Open Interest, PCR, Straddle and GEX, for one symbol and expiry. Layouts are saved in your browser and there is a phone layout.
Does it work on a phone?
Yes. The layout adapts to phone widths, so every tool reads well on a phone.
Start with the Option Chain.
Put what you’ve learned into practice with a market and expiry of your choice. The tools are for analysis only. To trade, you need a Sahi account, and brokerage and statutory charges apply.