What Is a Level 2 Quote? A Beginner's Guide

A Level 2 quote is a market-data display that adds detail behind the best quoted price for a security. Instead of showing only the highest available bid and lowest available ask, it can show the bid or ask price, displayed share size, and market participant associated with each quote in the data product. Nasdaq describes its Level 2 product as providing the top price level for each market participant in its execution system.¹

That extra detail can make a quote screen easier to read, but it does not reveal every order in the market or predict what a stock will do next. The exact information on a Level 2 screen depends on the exchange, venue, broker, and market-data package behind it.

Key Takeaways

• A Level 2 quote adds participant-level bid and ask detail beyond a basic best-bid/best-ask quote.
• A typical row identifies a participant, the bid or ask side, a price, and the number of displayed shares at that price.
• Level 2 data is not automatically a complete order book or a complete view of all U.S. trading venues.
• A displayed quote is not a completed trade, a guarantee of execution, or a prediction of a later price.
• SEC Form 4 filings report public changes in beneficial ownership. They answer a different question than intraday quote data.

What a Level 2 quote shows

At its simplest, a Level 2 display organizes current displayed quotes from market participants. A bid is a displayed price at which someone is willing to buy. An ask, also called an offer, is a displayed price at which someone is willing to sell. The size is the number of shares currently displayed at that price by the participant or in the aggregated price level, depending on the feed.

Nasdaq's Level 2 technical specification shows the core fields carried in a participant bid/ask update: the market side, participant shares, stock symbol, and price.² A broker or data vendor turns those updates into the rows, columns, and colors a reader sees on screen.

The term matters because market data is not one universal display. A platform may label a feature “Level 2” while sourcing it from a particular exchange or combining feeds from more than one venue. Before relying on a screen, check the product description to learn which market it covers and whether the data is real-time or delayed.

Level 1 and Level 2 quotes answer different questions

Level 1 data generally focuses on the best available bid and ask, sometimes called the inside quote. It gives a concise view of the lowest displayed selling price and highest displayed buying price available in the relevant data feed. For the basic terms, see this bid-versus-ask price guide.

Level 2 adds a layer of attribution or depth detail. Rather than showing only one best bid and one best ask, it can show which market participants are quoting and what they are displaying at their top prices. A 2026 SEC market-information exhibit distinguishes top-of-book liquidity, often called Level 1, from individual dealer quotes at all prices, often called Level 2, for Nasdaq stocks.³

Neither display should be mistaken for a promise that a transaction will occur at a particular price. Quotes can change as new orders arrive, displayed orders are cancelled or revised, or trades occur. A quote is information about displayed interest at a point in time.

How to read a Level 2 screen

Reading a Level 2 display starts with the labels, not the color of the rows or the apparent size of one quote. Broker interfaces differ, but the underlying questions are consistent.

Identify the side of the market

First, determine whether you are looking at bids or asks. Bids are on the buying side; asks are on the selling side. The best bid and best ask together form the inside quote. The difference between them is the bid-ask spread.

Next, look at the price. On the bid side, higher prices are normally closer to the inside bid. On the ask side, lower prices are normally closer to the inside ask. The order in which a platform displays rows is a presentation choice, so use the column labels rather than assuming every screen sorts the same way.

Read displayed size carefully

Displayed size is a quantity, not a forecast. Nasdaq's specification describes participant shares as the current number of shares displayed by that participant at the stated price.² It does not tell a reader what undisplayed interest may exist elsewhere or what later orders may enter the market.

Some platforms show an individual participant's displayed size. Others aggregate displayed size at a price level. Those are useful distinctions to verify in the vendor's documentation. A large number on a screen is still only the quantity that the relevant feed displays at that moment.

Notice the market-participant label

On some Level 2 products, a label identifies a market maker, electronic communication network, exchange, or other market participant. That label helps describe the source of the displayed quote inside that market's system. It does not identify the ultimate customer behind every order or explain why the quote was posted.

For a plain-language explanation of the role those firms play, see how market makers work. The participant label identifies a quoting entity in the feed; it is not a conclusion about that entity's view of the issuer.

This is one reason to avoid reading a single row as a conclusion about market intent. A quote display is a changing operational record of published prices and sizes, not a narrative about who is “right” about a company.

Level 2, market depth, and a full order book are not the same thing

Level 2 is related to market depth, but the terms are not interchangeable. Market depth describes the quantity of displayed buying and selling interest at different price levels. A Level 2 product may show some of that detail, but its exact scope depends on the venue and feed.

For example, Cboe's One Premium Feed provides up to 48 levels of aggregate depth across Cboe's four U.S. equity exchanges.⁴ That is a defined view of Cboe venue data. It is not automatically the complete set of quotes and orders across every U.S. trading venue.

Nasdaq separately describes TotalView-ITCH as a data feed containing every quote and order at every price level for securities traded on the Nasdaq Stock Market.¹ That comparison is useful: a product called Level 2 can be participant-level quote data, while a full-depth product may expose a wider or differently organized order-book view. Always read the particular product description.

For a broader explanation of how displayed liquidity relates to price changes, read what market depth means. The key point is that a visible display has a defined coverage area. It should not be described as the entire market unless the provider documents that scope.

What Level 2 data can and cannot tell you

Level 2 data can show current displayed quotes in the market-data product you are using. It can help a reader distinguish a bid from an ask, see price levels beyond a single inside quote, and understand whether sizes are presented by participant or aggregated by price.

It cannot establish the full amount of market interest, guarantee that a displayed quote will remain available, or identify a future transaction price. A quote may be changed, cancelled, matched, or joined by another quote. The information is useful precisely because it is current and specific, not because it eliminates uncertainty.

It also does not replace the broader market-mechanics context. A trade is a completed transaction. A quote is an available displayed price and size. The stock-price mechanics guide explains why a price can change as buyers and sellers agree to new transactions.

How Level 2 data differs from SEC Form 4 data

Level 2 and Form 4 records are both public information, but they serve different purposes. Level 2 describes current displayed quotes in a market-data feed. An SEC Form 4 is a public filing that reports certain changes in beneficial ownership by officers, directors, and other reporting persons.

Insider Trading Alerts can help a reader notice newly public Form 4 activity and return to the filing. A Level 2 screen can show displayed bid and ask information during market hours. Neither source establishes a person's motive or recommends a trade.

Insider Trade Alerts are most useful when they lead back to the original Form 4, where a reader can verify the reporting person, issuer, transaction date, transaction code, ownership form, and footnotes. For the filing fields themselves, start with this SEC Form 4 filing guide.

The distinction is worth keeping clear. A public ownership filing is not an order-book display, and an order-book display is not evidence about why a reporting person made a transaction. They can each be part of a source-first research process, but they should not be treated as shortcuts to a market conclusion.

A simple checklist for reviewing a Level 2 quote

Use this checklist to understand what the screen shows before drawing any broader conclusion:

1. Identify the product. Find out whether the data comes from Nasdaq, another exchange, a consolidated display, or a vendor-specific feed.
2. Check timing. Confirm whether the data is real-time or delayed and whether the display is currently updating.
3. Separate bids from asks. Read the market side, price, and displayed size together.
4. Check the scope. Determine whether the screen shows top-of-book, participant-level quotes, aggregated depth, or a more complete order-book product.
5. Separate quotes from trades. A displayed bid or ask is not the same as a completed transaction.
6. Use the limits. Treat the display as current market context, not as a prediction or individualized trading instruction.

Frequently asked questions

Is Level 2 the same as market depth?

Not exactly. Level 2 is a type of market-data display that can provide quote detail beyond a basic best bid and ask. Market depth is the broader idea of displayed buying and selling interest at different price levels. The amount of depth shown depends on the particular data product.

Does Level 2 show every order?

No. The scope depends on the exchange and feed. Nasdaq's current product catalog distinguishes its Level 2 service from TotalView-ITCH, which it describes as showing every quote and order at every price level in the Nasdaq Stock Market.¹ A platform's “Level 2” label is not enough by itself to establish full coverage.

Does Level 2 data predict stock prices?

No. It shows displayed quotes and sizes at a point in time. Those quotes can change, and the display does not establish future prices, execution, or the reason market participants posted their quotes.

Is Level 2 data the same as a Form 4 filing?

No. Level 2 is intraday quote data. Form 4 is a public ownership-change filing. Each can provide factual context, but they report different kinds of information and neither is a recommendation to buy, sell, hold, or trade a security.

The bottom line

A Level 2 quote adds detail behind a basic price quote by showing displayed bids and asks from market participants or price levels in a particular data product. To read it well, identify the market, timing, side, price, size, and coverage of the feed before making any claim about what it means.

Used this way, Level 2 is a tool for understanding displayed quote information. It is not a complete national order book, a guarantee of execution, or a forecast of a stock's next move.

This article is for informational and educational purposes only. Market data and public SEC filings are not investment advice or a recommendation to buy, sell, hold, or trade securities.

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