Free Open Interest Chart
Visualize options open interest across strikes and expirations. Identify market sentiment, support/resistance levels, and key price zones where traders are positioned.
Call Open Interest
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Put Open Interest
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Total Open Interest
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Put/Call Ratio
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Open Interest by Strike Price
Highest Open Interest Contracts
What is Open Interest in Options Trading?
Open interest represents the total number of outstanding options contracts that have not been closed, exercised, or expired. Unlike volume, which measures daily trading activity, open interest shows the total number of active positions in the market, making it a crucial indicator of market liquidity and trader sentiment.
Why Open Interest Matters
Market Sentiment Indicator
High open interest at specific strike prices often indicates strong support or resistance levels. Traders use these levels to identify where the market expects significant price action.
Liquidity Assessment
Higher open interest typically means better liquidity, tighter bid-ask spreads, and easier entry/exit from positions. This is essential for active options traders.
Put/Call Ratio Analysis
The put/call open interest ratio helps gauge market sentiment. A ratio above 1.0 suggests bearish sentiment, while below 1.0 indicates bullish sentiment among options traders.
Max Pain Theory
Open interest data is used to calculate the "max pain" price—the strike price where option holders would lose the most money at expiration, potentially influencing price movement.
How to Use Our Open Interest Chart
- 1Enter a Ticker Symbol: Start by entering the stock or ETF symbol you want to analyze (e.g., SPY, AAPL, TSLA).
- 2Select Expiration Date: Choose the expiration date you're interested in. Closer expirations often have higher open interest.
- 3Filter by Contract Type: View calls only, puts only, or both together to understand directional bias.
- 4Analyze the Charts: Look for strike prices with unusually high open interest—these often act as magnets for the underlying price.
Key Metrics Explained
- Call Open Interest Total
- The sum of all outstanding call option contracts across all strikes for the selected expiration.
- Put Open Interest Total
- The sum of all outstanding put option contracts across all strikes for the selected expiration.
- Put/Call Open Interest Ratio
- Calculated as Put OI ÷ Call OI. Values above 1.0 suggest more bearish positioning, while values below 1.0 indicate bullish positioning.
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Frequently Asked Questions
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