How to Use Open Interest for Intraday Trading

How to Use Open Interest for Intraday Trading

Intraday trading is a challenging and thrilling strategy used in the stock market that allows traders to profit from the price movement of financial assets on the same day. However, a considerable risk is involved because it includes purchasing and selling assets on the same day. Important details like open interest analysis, which might improve futures market chances, are frequently disregarded by traders. Volume and open interest are equally significant for short-term investments since they might indicate short-term support and resistance. 

A strategy that is accurate, goal-oriented, and capable of correctly anticipating changes in the rates of securities is necessary to thrive in the stock market business. Gaining knowledge about open interest in trading can reduce the likelihood of losing money and raise the likelihood of making the desired gains. 

Thus, this post will answer the often-asked question about how to use open interest for intraday trading. Let's take a closer look at this.

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What is Open Interest for Intraday Trading?

The total outstanding contract numbers retained at the conclusion of each trading day are known as the open interest. The total amount of activity in the futures and options market is gauged by open interest. Create a new position each time two people are involved, the buyer and the seller. It explains the rise in open interest for a single contract. The open positions that aren't closed yet are shown. Remember this when a trader ends a position. A single contract reduces the open interest, and it doesn't alter whether the buyer or seller transfers their position to another buyer or seller. This open interest indicator identifies changes in the trend of asset prices.

A spike in OI indicates that there is a significant money movement in the market. Furthermore, a downturn in the period of OI signals the end of the current price trend or a potential trend reversal.

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Table of Content

  1. What is Open Interest for Intraday Trading?
  2. What is Volume?
  3. Definition of OI & Volume
  4. How to use Open Interest Strategy or Intraday Trading 
  5. Calculation of OI & Volume
  6. Open Interest Analysis and Significance
  7. Open Interest Vs Volume
  8. Open Interest Indicators

What is Volume?

The quantity of contracts that are traded throughout the trading day is referred to as volume in the stock market. Options interest and volume, these are two different things. The volume indicates how many contracts are made between the buyer and vendor. The contracts that have been traded on the stock market, whether they are new or old, don't matter. The open interest shows the quantity of active and open contracts, which is one of the fundamental distinctions between it and volume. On the other hand, the volume shows the number of contracts that have been completed throughout a trading day.

Open interest is used in combination with additional information about the volume parameter. As you'll see, the trade volume increases during stock market hours as more trading occurs. Even as a novice, you can quickly determine the volume that reflects the strength or pressure behind a stock price. Many technical traders note that higher volume suggests that the stock trend may continue to increase rather than reverse based on past data.

Most technical traders believe that the volume can precede the stock price. They basically think that the end of an uptrend or downtrend will be shown in the volume. This can tell the trader that the trend reverses on a financial asset's open interest chart bar. The rules for both volume and open interest are combined due to their similarity. But still, many experts admit that there are exceptions to these rules.

Definition of OI & Volume

In intraday trading, open interest is the total number of open contracts in a certain market at any one moment. It shows how many contracts have been started but not closed or delivered yet.

Conversely, volume represents the total number of shares or contracts traded during a specific period, such as a trading day. It measures the activity and liquidity of a market.

In intraday trading, open interest offers information about the amount of money or interest invested in certain securities or derivatives, as well as the general mood of the market. Open interest may be used to assess a trend's strength or weakness, as well as potential price reversals.

The quantity of shares or contracts that are traded is measured by volume. It shows the amount of sales and purchases over a given period of time. High volume during price adjustments confirms the strength of a trend and shows that more individuals are engaging in the market.  On the other hand, low volume during price changes might be a sign of sluggish market activity and even unpredictable price changes.

How to use Open Interest Strategy or Intraday Trading 

Open interest in Intraday trading is a valuable indicator that can be incorporated into your intraday trading strategy to gain insights into market sentiment and potential price movements. Below mentioned are some ways to effectively use an open interest trading strategy for intraday trading.

1.Analyze Open Interest Trends 

Monitor changes in open interest over time. Rising open interest suggests increasing market participation and potential strength in a particular security or contract. Falling open interest may indicate diminishing interest and a potential shift in market sentiment. By tracking these trends, you can align your positions with prevailing market sentiment.

2.Confirm Trend Strength 

Confirm price trends by analyzing open interest in intraday trading. When open interest increases along with rising prices, it indicates a strong trend and potential continuation. Conversely, a decline in open interest during price increases may suggest a weakening trend or an impending reversal. Use of open interest in intraday trading can help to validate the strength of trends identified through technical analysis.

3.Identify Support and Resistance Levels

Open interest can help identify significant support and resistance levels. Higher open interest near a support level suggests increased buying interest, potentially leading to a price rebound. Similarly, higher open interest near a resistance level may indicate increased selling interest, potentially resulting in a price reversal. Incorporate open interest in intraday trading analysis into your decision-making process when identifying key levels for entry and exit point

4.Monitor Option Contracts

Pay attention to open interest in option contracts, as they can provide additional insights into market sentiment. Analyze the open interest of the call and put options to gauge bullish or bearish sentiment in the market. An increase in open interest intraday trading for call options may suggest a bullish outlook, while a surge in put options open interest could indicate a bearish sentiment. Consider these indicators when formulating your intraday trading strategy.

5.Combine Open Interest with Volume

Use open interest intraday trading  in conjunction with volume analysis to validate trading signals. High open interest accompanied by high volume during price movements provides more confidence in the sustainability of a trend. Conversely, divergence between open interest and volume can indicate a potential trend reversal. Analyze both indicators together to strengthen your trading decisions.

For investors or traders who are eager to learn how to trade using open interest? We may use four easy methods to identify the market using the principle of open interest. The following are these four ways:

Situation 1: The market is considered to be in a bullish phase when there is an increase in both open interest and price activity.

Situation 2: The market is on the verge of becoming bearish, but it is still possible to be positive when there is a decline in open interest and a rise in price.

Situation 3:  At a moment when the price action will abruptly decline and there will be a rise in open interest. Because of this market's perceived bearishness, traders are forced to liquidate their financial assets.

Situation 4: In the last case, the market appears to be viewed as bearish based on these open interest estimates, and there will be a decline in both price movement and open interest.

Calculation of OI & Volume

After understanding how to use open interest for intraday trading, let’s understand the calculation of open interest and volume:

Open Interest (OI): 

The entire number of pending or open contracts in a certain market is represented by open interest. It is frequently employed in relation to trading in futures and options. The following are the main ideas to remember:

  1. Definition: Open Interest is the total number of contracts that are held by market participants at the end of a trading day.
  2. Calculation: To calculate Open Interest, you sum up the number of open long positions (buyers) and open short positions (sellers). It's important to note that there is a seller for every buyer, so the total open interest is always an even number.
  3. Example: Open Interest remains constant until the contracts are closed or expire. If you have 100 buyers and 100 sellers of a particular futures contract, the open interest is 200. If one of the buyers sells to another trader, the open interest remains the same because the number of open contracts hasn't changed.


Volume is a measure of how much of a given asset (stocks, futures contracts, options) is being traded in the market. It is expressed in terms of the number of shares or contracts traded during a specific time period. Here's a breakdown:

  1. Definition: Volume represents the total number of shares or contracts traded during a specified time frame, such as a trading day.
  2. Calculation: Volume is calculated by summing up the number of shares or contracts traded for each transaction during the designated period. For instance, if 500 shares are bought, and 500 shares are sold, the volume for that transaction is 1000.
  3. Dynamic Nature: Unlike Open Interest, volume is continuously changing as trades are executed throughout the trading day. It provides insights into the intensity or activity level in the market.

Open Interest Analysis and Significance

Open interest is one market activity indicator. There are either no available vacancies, or almost all the posts have been filled due to little or no interest. Because many contracts are still open while there is high open interest, market players will be constantly monitoring that market.

Money flow into or out of a futures or options market is measured by open interest. Growing open interest signifies fresh capital entering the market, whilst declining open interest signifies capital leaving the market.

Since open interest gives traders important information about an option's liquidity, it is important to them.

Open Interest Vs Volume

CriteriaOpen InterestTrading Volume
DefinitionReflects the total number of open and outstanding contracts in the market.Measures the number of contracts traded within a specific time frame, indicating buying and selling activity.
NatureLagging IndicatorReal-time Indicator
InformationProvides details about existing positions.Offers insight into recent trading activity.

Open Interest Indicators

To optimize your intraday trading profits, use these strategies:

1. Confirming Breakouts: A breakthrough in the stock price from a significant resistance level is confirmed if the open Interest increases concurrently with the breakout. A breakthrough and higher Open Interest indicate a higher chance of the trend continuing.

2. Divergence Analysis: Seek for discrepancies between Open Interest patterns and pricing. It might be a sign that the trend is going to change when the price is rising to greater highs but the Open Interest is declining.

3. Options Trading: For intraday option traders, keeping an eye on open interest is crucial. Changes in open interest for specific options contracts might provide hints about the positioning of smart money.

Monitoring open interest can provide insights into the overall market sentiment and the level of participation in a specific contract during the trading day. It can help traders gauge the liquidity and popularity of a particular instrument, which can be useful when assessing the potential for price volatility and identifying areas of support or resistance.

By including open interest analysis in the intraday trading strategies, traders can gain a deeper understanding of market dynamics and make more sound trading decisions.

Frequently Asked Questions

Financial websites, trading platforms, and market analysis tools that provide real-time updates and charts for futures and options contracts are good sources of open interest data for intraday traders.

Open interest represents the number of outstanding contracts, while volume measures the number of contracts traded within a specific timeframe.

Yes, the volume ratio changes daily as it represents the total number of shares or contracts  traded during a specific time frame, such as a trading day, and is continuously updated as transactions occur.

A high open interest rate suggests significant market involvement and may help to maintain a trend, which is encouraging. It must be considered in context and examined in conjunction with price fluctuations for a thorough assessment.

Open interest in intraday trading should be used as part of a comprehensive strategy alongside other analysis tools for well-informed trading decisions.

Open interest alone does not predict price movements but can be used with other indicators to assess market sentiment.

Open interest analysis tool alone cannot predict market direction with certainty. It is just one tool among many that traders use to assess market sentiment.