Open InterestLive Nifty & BankNifty Open Interest Tracker
Tick #0
What is a live OI Tracker?
An OI tracker is a live tool that displays open interest — the total number of unsettled F&O contracts — across every strike price of an index or stock, updated every few seconds during Indian market hours. Unlike a static option chain that shows yesterday's positioning, an OI tracker surfaces real-time change in OI: which strikes are attracting fresh money today, which strikes are getting unwound, and where institutional short/long buildup is happening right now. For an intraday F&O trader, this is the single most actionable view on the NSE option market.
How to use this OI Tracker
- Pick the index (Nifty, BankNifty, FinNifty, Sensex) or F&O stock you want to track
- Use OI Change to see fresh positioning per strike for the current window
- Use Open Interest for the cumulative wall map — biggest Call OI is resistance, biggest Put OI is support
- Use Multistrike OI to plot up to 6 strikes against the spot intraday — see exactly when shorts entered or unwound
- Watch the time-range pills (5/15/30 min, 1/2/3 Hr, Full Day) to zoom into recent flow vs the day's buildup
- Cross-reference PCR (top stat) — above 1.2 bullish, below 0.8 bearish
- Use AI Signals tab for an interpretive read of the same data
OI Buildup vs OI Unwinding — the four setups
- OI rising + price rising → Long buildup. Bullish continuation.
- OI rising + price falling → Short buildup. Bearish continuation.
- OI falling + price rising → Short covering. Mildly bullish, often a corrective bounce.
- OI falling + price falling → Long unwinding. Pullback from longs.
Frequently asked questions
What is an OI tracker?
An OI tracker is a live tool that displays open interest (total outstanding F&O contracts) across all strike prices of an index or stock, refreshed every few seconds during market hours. It shows how institutional money is shifting between strikes in real time, helping traders spot buildup (bullish/bearish positioning) and unwinding (exiting positions) as they happen.
Is this OI tracker free to use?
Yes. MarketsEasy OI tracker is completely free — no subscription, no credit card, no usage cap. Sign in with Google and the full tracker is unlocked with live NSE data.
Which instruments does the OI tracker support?
All NSE F&O instruments — Nifty 50, BankNifty, FinNifty, Midcap Nifty, and every F&O stock. Pick the symbol, choose the expiry, and see live OI and OI-change data strike-by-strike.
How often does the OI tracker refresh?
During market hours (09:15 to 15:30 IST), the tracker refreshes roughly every 15-30 seconds. Visibility-aware polling means it slows to once every 5 minutes when the tab is in the background to save network load.
How do I read OI buildup and OI unwinding?
OI rising + price rising = long buildup (bullish continuation). OI rising + price falling = short buildup (bearish continuation). OI falling + price rising = short covering (corrective bounce). OI falling + price falling = long unwinding (pullback, often mild). The sign of OI-change combined with price direction tells you who is winning.
What is the difference between an OI tracker and an option chain?
An option chain shows total OI at every strike — a static snapshot. An OI tracker shows change in OI over time — where fresh money is entering or exiting today. Both matter, but for intraday decisions, OI-change is more actionable than total OI. Our tool shows both side-by-side.
Do I need a broker account to use the OI tracker?
No. The OI tracker pulls data directly from NSE and works without any broker connection. No trading account, credentials, or broker linking is required — just open the page.