Option chain analysis for intraday trading is less about one perfect reading and more about a routine: the same few checks, in the same order, repeated at set times through the session. Done that way, the chain tells you where option writers have built their floors and ceilings, whether those levels are being reinforced or abandoned today, and how much movement the market is pricing. This guide sets out a seven-step routine for the NIFTY option chain, with what each step looks for and what it cannot tell you. Each step points to the moment in the Option Chain video tutorial that shows it on screen, and the full tutorial plays at the end of the page.
Before you start: what option chain analysis can and cannot do
An option chain lists every call and put for one index and one expiry, strike by strike, with each contract’s price, open interest, change in open interest, volume and implied volatility. Option chain analysis reads that table for positioning: where the open contracts sit, and where new ones are being opened or closed. It is good at showing where pressure is concentrated. It is not a forecast. Walls break, totals mislead, and on expiry afternoons the clock matters more than positioning. Keep that in mind at every step below.
Step 1: Pick the chain and note the money (tutorial 0:17)
Choose the index and the expiry. For intraday work on NIFTY that is usually the front weekly expiry, which carries most of the open interest; on expiry day itself, the next week’s chain is worth a look too. Note the spot level and the at-the-money strike, which the Option Chain highlights, with a line marking spot. Everything that follows is measured from there. Watch the step.
Step 2: Read the summary chips (0:33)
The row of chips across the top sums up the whole chain: max pain, resistance (the strike with the most call open interest), support (the strike with the most put open interest), total call and put open interest, the sum of call and put premiums, and the put-call ratio, total put open interest divided by total call open interest. Read them as a first sketch of the day: where the walls are, how far apart they are, and which side carries more open interest. Do not stop there. A PCR above 1 is labelled bullish and below 1 bearish, but a high PCR can also mean heavy put buying for protection; the PCR guide explains why it fools people. Watch the step.
Step 3: Find the walls and the corridor (1:17)
Look at the open interest bars on each side. The bars grow away from the strike, each side scaled to its own largest value, so the heaviest call strike above spot and the heaviest put strike below it stand out without reading digits. Together they mark the corridor the index is trading in. Measure its width in points and compare it with the move the market is pricing: the at-the-money straddle, the call plus the put at the money, is the expected move to expiry. A corridor much narrower than the expected move is unlikely to hold all session; a wide one leaves room to trade inside it. The support and resistance guide covers why writers defend these strikes. Watch the step.
Step 4: Read the change, not just the total (1:17)
The OI column is history: open interest built up over the life of the contract. The OI Chg column, today’s change with its percentage, is what carries information during the session. A wall with a huge total and a large negative change is being dismantled today, and a strike with a modest total but a large positive change is where today’s positioning is going. In option chain analysis for intraday, this is the column to come back to every time. The change in OI guide goes deeper.
Step 5: Read the build-up stripes (2:08)
Open interest alone does not say whether buyers or writers opened the new contracts. The premium does. Each OI cell on the chain carries a coloured stripe naming the combination: open interest up with premium up is long build-up, open interest up with premium down short build-up, open interest down with premium up short covering, and open interest down with premium down long unwinding. At the wall strikes, short build-up means writers are adding, so the level is being defended; short covering means writers are buying back, so it is weakening. The call writing and put writing guide explains the writer’s side of each case. Watch the step.
Step 6: Check volume and implied volatility (3:37)
Two columns add context. Volume shows where trading is heaviest today; when volume at a strike is larger than its open interest, the position there has turned over completely this session, so the open interest says less about lasting commitment. Implied volatility per strike shows where the market is charging most for movement, and the IV Skew card under the chain draws it across strikes with the at-the-money IV, its rank and its percentile. A steepening put side means demand for downside protection is building. Watch the step.
Step 7: Look again at set times, and replay what you missed (3:29)
The chain is a snapshot; the routine turns it into a sequence. Repeat steps 2 to 6 at a few fixed points, for example 09:45, 11:30, 13:30 and 14:45, and compare. Has resistance moved to a new strike? Is the put wall still growing as the index comes toward it? Has the PCR drifted, and why? If you missed part of the session, Replay steps through the stored snapshots of any recorded day, so you can see which strikes were built first. Clicking a strike opens a quick look at its recent sessions, and Strike History shows its whole life. Watch the step.
Common mistakes in option chain analysis
- Reading totals instead of changes. The biggest total is often yesterday’s story.
- Treating walls as guarantees. A wall is where writers will hedge and defend, not a price the index cannot cross.
- Ignoring the expiry clock. On expiry afternoons, premiums melt on schedule and strikes pin or break fast; the expiry-day guide covers that session.
- Reading the PCR alone. A ratio cannot tell protection buying from put writing; the build-up stripes can.
- Forgetting the close. Since August 2026 the official NIFTY close comes from a closing auction, and expiring options settle on that print, not on the last value before 15:15.
A worked reading
Take the chain in the figure, at the close of a day NIFTY fell to 23,063.10. Resistance sat at 24,000 and support at 23,000, a corridor of 1,000 points with spot only 63 points above the floor. Call open interest of 24.25 crore outweighed put open interest of 17.67 crore, for a PCR of 0.73, and max pain sat higher at 23,300. The intraday questions from there are the ones the routine asks: is the 23,000 put wall still being added to as the index sits on it, or are its writers covering? Are calls being written at the strikes just above, which would press the ceiling lower? The answers are in the OI Chg column and the stripes, and they change through the day. None of them says what the next session will do.
Where option chain analysis fits with the other pages
- OI Stats draws the same open interest as bars with a time slider, which makes walls and their movement easier to see.
- Trending OI sums call and put open interest changes across chosen strikes in fixed intervals, so the session’s sequence is on one table.
- The Session Chart draws the call wall, put wall and pin on the price candles minute by minute.
- Alerts can watch for spot nearing a wall or a wall’s open interest unwinding, so the chain does not need watching all day.
Option chain analysis FAQ
What is option chain analysis? Reading the table of calls and puts for an index or stock, strike by strike, to see where open interest sits and where it is being added or removed, and what that suggests about support, resistance and expected movement.
Which column matters most for intraday? The change in open interest, read together with the premium’s direction. The total open interest mostly shows where positions were built in the past.
How often should I check the chain during the day? At a few fixed times rather than continuously. Comparing snapshots shows what changed, which is the useful part.
Is a PCR above 1 bullish? It is labelled that way, because more put open interest usually means more put writing below the index. But put buying for protection raises the PCR too, so check the build-up stripes before reading it either way.
Can option chain analysis predict the market? No. It shows positioning and pressure. Levels hold often enough to be worth knowing and break often enough that no single reading should be treated as a forecast.
Takeaways
- Option chain analysis for intraday works best as a routine repeated at set times, not as one reading.
- Start with the chips, then find the walls and the corridor, and measure the corridor against the expected move.
- The change in open interest and the build-up stripes carry the day’s information; the totals carry history.
- Volume and implied volatility add context: turnover at a strike, and where protection is in demand.
- Replay and Strike History show how the chain got where it is; the video tutorial shows every step on screen.