Hey traders, Barry Burns here with Top Dog Trading. When trading options, spotting a great chart setup isn’t enough. You might identify the perfect triangle pattern or breakout opportunity, but if the option you choose lacks liquidity, the trade can quickly turn against you—even if your market analysis is correct.
In this guide, we’ll break down the importance of options open interest, volume, and bid-ask spread, and how these factors determine whether a trade is worth taking at all.
Hope you enjoy it!
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Options Open Interest Explained: How to Choose Liquid Options for Better Trades – Video
Why Chart Setups Alone Aren’t Enough
Imagine you’ve found a strong technical pattern on a stock chart—perhaps a symmetrical triangle with tightening price action. Instead of trading the stock directly, you decide to trade options.
At this point, many traders jump straight into buying calls or puts without checking the quality of the option contract itself. That’s where problems begin.
Even with a perfect setup, a poorly chosen option can lead to:
- Bad entry prices
- Difficulty exiting the trade
- Increased slippage
- Reduced profits (or even losses)
What Is Open Interest in Options?
Open interest refers to the number of active contracts that are currently held by traders and have not yet been closed.
In simple terms, it tells you:
- How many traders are involved in that option
- Whether there’s enough participation in the market
High open interest means there are plenty of buyers and sellers available—this is exactly what you want.
Low or zero open interest is a major red flag. It indicates that no one is actively trading that contract, making it extremely difficult to enter or exit positions at a fair price.
Open Interest vs. Volume: What’s the Difference?
Although often confused, open interest and volume measure different things:
- Open Interest: Total number of outstanding contracts still open
- Volume: Number of contracts traded during the current day
Volume resets daily, while open interest is cumulative.
Both metrics are important because they reflect liquidity—how easy it is to trade that option.
Why Liquidity Is Critical in Options Trading
Liquidity determines whether you can:
- Enter a trade at a reasonable price
- Exit without large losses due to poor pricing
- Avoid unnecessary slippage
If liquidity is low, even a correct market prediction may not result in profit because you won’t get favorable fills.
In short: a great trade idea means nothing without liquidity.
Understanding the Bid-Ask Spread
Another key factor to evaluate is the bid-ask spread, which is the difference between what buyers are willing to pay (bid) and what sellers are asking for (ask).
A wide spread signals low liquidity and higher trading costs.
Rule of Thumb
A good benchmark is:
- The ask price should not exceed 10% above the bid price
For example:
- If the bid is $3.00
- The ask should ideally be no higher than $3.30
Anything wider than that becomes expensive and inefficient to trade.
Example of a Poor Options Setup
Consider an option with:
- Zero open interest
- Zero volume
- A bid of $0 and an ask of $10
This is a clear no-trade situation. There’s no liquidity, and the spread is extremely wide. Entering a position here would almost guarantee a bad fill.
Even if there is minimal activity—say one contract traded—the spread may still be too wide to justify the trade.
Example of a High-Quality Options Setup
Now compare that to a more active stock like Lululemon Athletica, where options often show:
- Open interest in the hundreds or more
- Consistent volume across strike prices
- Tight bid-ask spreads
This kind of environment provides flexibility. As the stock price moves and options shift in or out of the money, you’ll still have liquidity across multiple strike prices.
That’s exactly what you want for smooth entries and exits.
Why Clusters of Open Interest Matter
It’s not enough to find just one strike price with high open interest. Ideally, you want to see clusters of liquidity across multiple strike prices.
This ensures that:
- You can adjust positions if needed
- You’re not stuck in illiquid contracts
- There’s always a market for your trade
This becomes especially important as the underlying stock moves and option values change.
How to Get Better Trade Entries
Even with good liquidity, you don’t need to accept the asking price right away.
Instead:
- Start with a bid below the midpoint of the spread
- Gradually adjust if needed
- Allow a few minutes for the order to fill
With liquid options and a quality broker, you can often get filled at better-than-expected prices.
The Non-Negotiable Rule: No Liquidity, No Trade
Here’s the bottom line:
If an option lacks liquidity, you skip the trade—no exceptions.
It doesn’t matter how perfect the chart setup looks. Without sufficient open interest, volume, and a tight spread, the trade becomes too risky.
Think of this as a strict filter:
- Good setup + good liquidity = valid trade
- Good setup + poor liquidity = no trade
Final Thoughts
Options trading offers powerful opportunities, but it also comes with unique challenges. Understanding open interest, volume, and bid-ask spreads is essential for making smart decisions.
Before entering any trade, always ask:
- Is there enough liquidity?
- Can I get a fair price in and out?
By prioritizing these factors, you can avoid unnecessary losses and improve your overall trading performance.
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