What is Max Pain Calculator?
Calculate max pain price for Nifty and Bank Nifty options based on open interest data to predict expiry price Simply enter your values, and the calculator instantly computes accurate results using standard financial formulas. All calculations are performed entirely in your browser — nothing is stored or transmitted.
Formula Used
Max pain theory: the underlying will expire at the price where total dollar value of in-the-money options is minimized, causing maximum loss to option buyers. Enter OI for each strike to find this price.
How to Use This Calculator
- Enter open interest (OI) for each call strike from the NSE option chain
- Enter open interest for each put strike
- Click Calculate to find the max pain price
- Compare max pain with current price to assess directional bias
- Most effective to use 1-3 days before expiry
Worked Example
Nifty strikes 21500-22500 | Call OI peaks at 22000 | Put OI peaks at 21500 → Max Pain calculated at 21750 | Market likely to gravitate near 21750 at expiry
Why Use This Tool?
- Identify likely expiry level for index options
- Plan option writing strategies around max pain level
- Understand where option sellers want the market to close
- Combine with PCR and technical analysis for higher accuracy
Frequently Asked Questions
What is the Max Pain theory?
Max Pain (also called Options Pain Theory) suggests that the underlying asset tends to close near the price where the maximum number of options (both calls and puts) expire worthless — causing maximum financial loss to option buyers and maximum gain to option sellers (writers).
How accurate is the Max Pain level?
Max pain has moderate predictive power, especially in the last 1-2 days before weekly expiry. It works better for index options (Nifty, Bank Nifty) than individual stocks. It should be used as one of multiple indicators, not as a standalone signal.
Where can I find open interest data for NSE options?
Visit nseindia.com → Markets → Derivatives → Option Chain. Select Nifty or Bank Nifty and current expiry date. The OI column shows open interest for each strike. Update this data daily as OI changes continuously during market hours.
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