About Open Interest
Call and put open interest at every strike, the change since the previous close (or between two times you pick), with the spot price and max pain marked. Big call OI above the price often acts as resistance; big put OI below it as support.
How to use it
- Pick the symbol and expiry (the nearest is chosen for you).
- Pick the day: today is live, or choose a past day to replay.
- Read the chart with the summary cards and the insight box below it.
Questions
Why are calls red and puts green?
Call writers usually sit above the price and act like a ceiling (red); put writers usually sit below it and act like a floor (green). Every OI chart here uses the same colours.
What does the OI change tell me?
Fresh call OI with a falling price usually means call writing (bearish). Fresh put OI with a rising price usually means put writing (bullish). Falling OI means positions are being closed.
Is this data live?
Yes, in market hours (9:15 am to 3:30 pm on trading days) the numbers refresh every minute without reloading the page. After the close you see the last session, and you can pick any saved past day.
Is this advice to buy or sell?
No. These are tools to read the market. They do not tell you what to trade. Options can lose all their value quickly; trade only what you understand and can afford to lose.
More oi tools
Open Interest for other symbols
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For learning and research only. This is not investment advice and does not suggest buying or selling any security. Data comes from the exchange through Upstox and can be delayed or wrong; check with your broker before you trade. Options and futures carry high risk.