Last updated: June 2026 · Educational guide · Not financial advice
Level 2 market data is the order book: a real-time view of the multiple buy (bid) and sell (ask) orders queued at different prices around the current market, along with their sizes. Where Level 1 shows only the best bid, best ask and last trade, Level 2 (also called market depth or depth of market) reveals the layers behind that top price — so you can see where liquidity sits and how supply and demand are stacked. Day traders use it to read order flow; long-term investors rarely need it.
If you have watched a day-trading stream, you have seen a flickering column of green and red numbers next to the chart — bids and asks updating many times a second. That is Level 2 data, and it is one of the most misunderstood tools in trading. This guide explains, in plain English, what Level 2 market data actually is, how it differs from Level 1 and the tape, where you can get it, what it costs, and — importantly — why the “Level 2” on a typical CFD or forex platform is not the same thing professionals mean.
What does “Level 2” actually mean?
Level 2 refers to the depth of the order book beyond the best price. Every exchange-traded instrument has an order book: a continuously updated list of resting limit orders. On the buy side are bids (the prices people are willing to pay); on the sell side are asks or offers (the prices people are willing to sell at). The single highest bid and lowest ask form the top of book — that is Level 1. Level 2 shows the additional price levels stacked behind the top, each with the total quantity (size) waiting there.
The term originated with Nasdaq. “Nasdaq Level II” historically meant the montage of quotes from individual market makers and electronic communication networks (ECNs), as opposed to “Level I”, which showed only the inside (best) quote. Today the same idea applies across venues: Level 2, market depth, and depth of market (DOM) all describe the same concept — visibility into the queue of orders, not just the front of it.
Level 1 vs Level 2 vs Time & Sales — what is the difference?
Three data products often get confused. They answer different questions.
| Data | What it shows | Question it answers |
|---|---|---|
| Level 1 | Best bid, best ask, last trade price and size | What is the current price? |
| Level 2 (market depth) | Multiple bid and ask price levels with sizes — the order book | Where is liquidity resting above and below? |
| Time & Sales (the tape) | A running log of executed trades: price, size, time | What is actually trading right now? |
Experienced tape readers use Level 2 and Time & Sales together: the order book shows intentions (resting orders that can be cancelled), while the tape shows actions (trades that actually happened). Level 2 alone can mislead, because orders you see may never execute.
How do traders use Level 2 data?
Level 2 is mainly a short-term, execution-focused tool. The most common uses:
- Reading liquidity. A large resting order at a price level can act as temporary support or resistance — until it is filled or pulled.
- Gauging order flow. Watching whether bids are stepping up or asks are stacking can hint at short-term pressure, especially alongside the tape.
- Better execution. Scalpers and active traders use depth to choose where to place limit orders and to avoid moving an illiquid market.
- Spotting thin books. If there is little size behind the top, price can jump quickly — useful risk information before sizing a position.
Where do you get Level 2 market data, and what does it cost?
Level 2 is exchange-owned data, so it almost always carries a fee on top of your broker or platform. The price depends on the venue and on whether you are classed as a non-professional or professional subscriber (professionals pay substantially more). Treat the figures below as directional, not a current quote — exchange fees change and are set by each venue.
| Source | What you get | Notes |
|---|---|---|
| Nasdaq TotalView | Full depth of book for Nasdaq-listed names (every quote and order) | The deepest Nasdaq product; sold via brokers/platforms as a monthly data subscription |
| NYSE / NYSE Arca depth feeds | Order book depth for NYSE and Arca-listed securities | Separate exchange subscriptions; names and tiers vary |
| CME (futures) | Market depth / DOM on Globex futures | Common in futures platforms; exchange data fees apply |
| Your broker’s platform | Level 2 add-on within the trading platform (e.g. active-trader tools) | Some brokers bundle or discount it for active accounts |
For US equities, the canonical Level 2 product is Nasdaq TotalView, which shows the full depth of book rather than just the best market-maker quote. Non-professional traders typically pay a modest monthly exchange fee, while professional (business-use) subscribers pay much more; your broker collects it and may waive it above a trading-activity threshold. Before subscribing, check whether your strategy actually needs depth — see our best online brokers and best trading platforms guides for what each one includes.
Does Level 2 data work for CFDs and forex?
This is the part the marketing skips, and where most beginners get confused. True Level 2 data comes from a central exchange order book. CFDs and spot forex do not have one.
When you trade a CFD, you are dealing with your broker’s price, not buying on the underlying exchange. So the “depth” a CFD platform shows you — if it shows any — is the provider’s own book or a synthetic feed, not the real Nasdaq or NYSE order book for that share. Many retail CFD platforms (for example, simplified ones like Plus500) do not offer exchange Level 2 at all; they show a single quoted price. I trade CFDs, and this is a genuine limitation: you are reading the broker’s market, so classic order-book tactics from equities do not transfer cleanly.
Spot forex has a related issue: it is decentralised, with no single consolidated order book. What forex platforms label “Level 2” is usually an aggregated depth view from that broker’s liquidity providers or ECN — useful, but broker-specific and not a universal market-wide book. If genuine exchange depth matters to your strategy, trade exchange-listed instruments (stocks, futures) through a broker that provides real Level 2, not CFDs. For the mechanics of CFDs themselves, see our guide on what a CFD is and practical CFD trading.
👍 When Level 2 helps
- Active day trading and scalping on exchange-listed stocks or futures
- Reading short-term liquidity and order flow with the tape
- Placing precise limit orders in fast markets
- Sizing positions in thin, low-liquidity names
👎 When it does not
- Long-term investing — Level 1 is enough
- CFD trading — you see the broker’s book, not the exchange
- Spot forex — no central order book exists
- Relying on it alone — orders can be spoofed or pulled
Is Level 2 market data worth it in 2026?
It depends entirely on your timeframe. If you are an active trader executing on exchange-listed stocks or futures, Level 2 plus Time & Sales is a genuinely useful edge for execution and risk — and the monthly fee is small relative to that. If you are a long-term investor, a swing trader holding for days, or you trade CFDs and forex, paying for Level 2 buys you flickering numbers you cannot fully trust and that do not match how your instrument is actually priced. Be honest about which trader you are before you subscribe. For most people reading this, the answer is: learn to read it on a demo first, and only pay once your strategy clearly needs depth.
Frequently asked questions
What is Level 2 market data in simple terms?
Level 2 market data is the order book: it shows multiple bid and ask price levels around the current market, each with the size of orders waiting there. Level 1 shows only the best bid, best ask and last trade, while Level 2 reveals the depth behind that top price so you can see where liquidity is resting.
What is the difference between Level 1 and Level 2 data?
Level 1 shows only the inside market — the best bid, best ask and last trade. Level 2 shows the full ladder of orders at multiple prices on both sides, known as market depth or depth of market. Level 1 answers “what is the price?”; Level 2 answers “where is liquidity stacked above and below?”
Is Level 2 data free?
Usually not. Level 2 is exchange-owned data and typically carries a monthly subscription fee on top of your broker, with non-professional users paying less than professionals. Some brokers bundle or waive it for active traders. Exact fees are set by each exchange and change over time, so check your broker’s market-data pricing.
Do CFD and forex platforms show real Level 2 data?
Not in the exchange sense. CFDs are priced by your broker, not bought on a central exchange, so any depth shown is the provider’s own book. Spot forex is decentralised and has no single order book, so “Level 2” there is an aggregated broker/ECN feed. For genuine exchange depth, trade exchange-listed stocks or futures.
Do I need Level 2 data as a beginner?
Probably not. Level 2 is an execution tool for active day traders and scalpers. Long-term investors and most swing traders do fine with Level 1. If you are curious, practise reading market depth on a demo account before paying for it, and pair it with Time & Sales rather than reading it in isolation.
Can Level 2 data be manipulated?
The order book can be misleading because it shows resting orders that can be cancelled, and hidden or iceberg orders never reveal their full size. Manipulative tactics such as spoofing and layering are illegal, but flickering, non-genuine size still makes a raw Level 2 read unreliable on its own. Confirm signals with executed trades on the tape.
What is Time and Sales versus Level 2?
Time & Sales (the tape) is a running log of trades that have actually executed — price, size and time. Level 2 shows orders that are still resting and may never fill. Traders use them together: Level 2 for intentions and liquidity, Time & Sales for confirmation of what is genuinely trading.
Sources & methodology
Sources prioritise exchanges and market regulators. Market-data fees are venue-set and change over time; figures here are directional, not current quotes. This guide is educational and not financial advice. Links accessed June 2026.
- Nasdaq — TotalView depth-of-book market data product (full order book for Nasdaq-listed securities). nasdaq.com TotalView
- Nasdaq — Market data product and fee information. nasdaqtrader.com data
- NYSE — Market data feeds (NYSE and NYSE Arca depth-of-book products). nyse.com market data
- CME Group — Market depth (DOM) and Globex order book data. cmegroup.com market data
- U.S. Securities and Exchange Commission — Investor.gov on order types and how markets work. investor.gov
- SEC — Spoofing and layering as prohibited market manipulation. sec.gov
- FINRA — Investor guidance on market data and trading. finra.org investors
- CFTC — Market manipulation and disruptive trading practices (futures). cftc.gov
- ESMA — Decentralised nature of OTC FX and CFD pricing (no central order book). esma.europa.eu
- DecodeTheFuture — Best online brokers for stock trading 2026 (data and platform comparison). decodethefuture.org
- DecodeTheFuture — What is a CFD? (why CFD depth differs from exchange Level 2). decodethefuture.org