ECN vs Market Maker Brokers: What's the Difference?
ECN vs market maker brokers explained: who takes the other side of your trade, how each gets paid, A-book and B-book, and how to compare the real costs.
Every broker’s website tells you it offers fast execution and tight spreads. Few of them tell you, in plain words, who is on the other side of your trade. The ECN vs market maker difference comes down to that question.
Quick answer: A market maker, or dealing-desk broker, takes the other side of your trade and quotes its own prices, earning from the spread and sometimes from client losses. An ECN or STP broker passes your order to outside liquidity providers and charges a commission on raw spreads. Most brokers mix both. Regulation and total cost matter more than the label.
ECN vs market maker: the two models in one picture
When you click buy on your platform, your order goes to your broker. What happens next depends on how the broker runs its business. There are two basic models, and nearly everything else you read about brokers is a variation on them.
A market maker fills your order itself. If you buy euros, the broker sells them to you from its own book. It may later pass some of that risk on to a bank, or it may keep it. Because a person or system at the broker decides how each order is handled, this is also called a dealing desk model.
An ECN or STP broker does not take the other side as a business decision. It passes your order on to one or more liquidity providers (large banks and specialist trading firms) and you are filled at their price. Because nobody at the broker is choosing whether to keep your trade, this is called a no dealing desk model. STP stands for straight-through processing; ECN stands for electronic communication network, a venue where many participants’ orders meet and match.
Tap between the two models below to see how the path of your order changes.
ECN vs market maker in one diagram. An STP or ECN broker passes your order on to liquidity providers; a market maker fills it from its own book and may hedge later.
The same contrast, drawn side by side, makes the key difference easier to see. In both cases you deal only with your broker. What changes is who ends up holding the opposite position, and therefore how the broker gets paid.
Neither picture is good or bad on its own. Well-regulated market makers can treat clients fairly, and a broker that calls itself an ECN can still give you poor fills. To judge a broker you need to understand how each model makes money, where the incentives point, and what the rules require. The Academy lesson on how brokers work introduces both models, and our guide to how forex trading works shows where the broker sits in the wider market.
How a market maker broker works
A market maker broker builds its own price. It takes prices from the wider interbank market as a reference, adds a margin, and shows you a bid and an ask. When you trade, you trade with the broker directly: the broker is the counterparty to every position you hold.
You will notice some practical features as a client:
- Stable or fixed spreads. Because the broker sets its own quote, it can keep the spread steady through most of the day. Some market makers advertise fixed spreads; others offer variable ones that move less than raw market spreads.
- Instant execution. Your order is usually filled at the price you clicked, or not at all. In a fast market the broker may decline that price and offer a new one, which is called a requote.
- No commission. The broker’s fee is built into the spread, so the cost is simple to see on every trade.
- Small sizes. Because the broker is not passing each order to a bank, it can comfortably fill very small trades, such as micro lots.
How a market maker gets paid
The broker earns the spread on every trade. Because the broker takes the other side, when you lose on a trade that it has kept on its own book, the broker gains, and when you win, the broker pays you out of its own pocket. Keeping client trades in-house like this is known as the B-book.
In practice, a market maker rarely holds each client trade as a bet. Thousands of clients are buying and selling at the same time, so many positions cancel each other out. The broker watches its net exposure, and when that grows too large it hedges the excess with its own liquidity providers. Most of the time, its income comes from the spread on a large, balanced flow of trades.
The conflict of interest, and how regulation handles it
Even so, there is a clear conflict of interest: on any trade the broker keeps, your loss is its revenue. That does not make a market maker a scam. Insurers and airport bureaux de change take the other side of their customers too. It does mean the incentives need watching, and regulators watch them.
In the UK and EU, a regulated firm must take all sufficient steps to obtain the best possible result for you when it executes your order, a duty called best execution. It must publish an order execution policy explaining how it prices and fills orders, and it must identify and manage conflicts of interest and tell you about them. Its prices must be fair against the wider market, and it cannot simply move a quote against you because you are winning. Rules introduced by the European Securities and Markets Authority (ESMA) in 2018 also capped retail leverage and required negative balance protection, which limits how much any single client can lose. The UK’s Financial Conduct Authority applies similar rules. Our guide to forex broker regulation explains how these protections differ between regulators.
Where a market maker is unregulated, none of that applies. The conflict of interest is then unchecked, and it is in that setting that you find manipulated prices, unexplained requotes and refused withdrawals. The danger comes from the absence of a regulator enforcing the rules.
How an ECN or STP broker works
An ECN or STP broker acts more like an agent. It connects to a group of liquidity providers, collects their prices, and shows you the best bid and the best ask available. When you trade, it passes your order on, and the provider with the best price fills it. The broker does not need you to lose to make money.
Strictly, the two labels mean slightly different things. STP describes the routing: your order goes straight through to a provider without anyone at the broker handling it. A true ECN is a network where orders from many participants (banks, funds, other brokers’ clients) meet, and you may see the depth of orders waiting at each price. In marketing, the terms are used interchangeably for any model that passes orders on.
Here is what you will notice on such an account:
- Raw, variable spreads. You see something close to the underlying market spread, which on EUR/USD in busy hours can be a fraction of a pip. It widens at quiet times, around the daily rollover, and on major news.
- A commission. Because the broker is not adding a mark-up to the spread, it charges a visible fee per lot, typically quoted as a round-turn figure (open and close together). This is the classic raw spread account.
- Market execution. Orders are filled at the next available price rather than the price you clicked. There are no requotes, but there is slippage.
- Slippage in both directions. If the price moves between your click and the fill, you get the new price, better or worse. In calm markets the difference is usually tiny; on news it can be several pips.
Try the simulator below. Switch between a calm market and a news release, and between a market order, a stop order and a limit order, to see how the filled price can differ from the price you requested.
Requested versus filled price for market, stop and limit orders, in a calm market and around a news release. Illustrative: on a no dealing desk account, market and stop orders fill at the next available price, which can be better or worse than requested.
How an ECN broker gets paid
The broker earns the commission, and sometimes a small mark-up on the raw spread as well. Its income rises with your trading volume, not with your losses. That removes the direct conflict a market maker has, but it is not the absence of all incentives. A broker paid per lot does well when clients trade often, which is worth remembering when you see marketing aimed at very active trading. The lesson on execution and slippage covers how to judge fills in more detail.
A-book, B-book and hybrid brokers
Very few retail brokers are purely one model or the other. Most run a hybrid: they pass some clients’ orders to liquidity providers, which is called the A-book, and keep other clients’ orders in-house, which is the B-book.
The choice is usually made by a risk-management system, not by a person reading your trades. Typical inputs are your trade size, how long you have been a client, how consistently you have made money, and how fast you trade. A large account that wins steadily is more likely to be A-booked, because keeping its trades would cost the broker money. A new, small account is more likely to be B-booked, because experience tells the broker that many such accounts lose.
That is not unfair in itself. Keeping small trades in-house is cheaper than sending each one to a bank, and a regulated hybrid broker still owes every client best execution, whichever book they are in. Your fills and prices should not depend on the book. What it does mean is that the label on the account type tells you less than you might think. An account marketed as “ECN” at a hybrid broker may have some of its flow internalised, and a broker that describes itself as a market maker may hedge most of its risk with banks.
In practice, you usually cannot know which book your trades are in, and you do not need to. What you can know, and should check, is whether the firm is properly regulated, what it charges in total, and how well it fills your orders.
Market maker vs ECN broker: costs, execution and conflicts compared
Put the two models side by side and the trade-offs become clear. Neither wins on every line. A market maker gives you a simple, predictable cost and fills at the price you click in normal conditions. An ECN broker gives you a lower raw spread and an incentive structure that does not depend on your losses, at the price of a commission and variable costs.
Cost: spread only, or raw spread plus commission
The cost difference is the one you can measure most easily. On a typical standard (market maker style) account you might see EUR/USD at 1.2 pips with no commission. On a typical raw (ECN style) account you might see 0.2 pips plus $7 per lot round turn. A pip on one standard lot of EUR/USD is worth about $10, so the costs per lot are:
- Standard: 1.2 × $10 = $12
- Raw: 0.2 × $10 + $7 = $9
In that example the raw account is $3 a lot cheaper. Change the inputs and the answer can flip: at 0.5 pips plus $8, the raw account costs $13 a lot and the standard account wins. These are typical figures for illustration, not quotes from any broker. Set your own numbers in the calculator below to see which structure costs less at your volume.
Standard
per month, spread only
Raw / ECN
per month, spread + commission
Standard (spread only, market maker style) versus raw (tight spread plus commission, ECN style) monthly cost at your own volume. Typical pricing for illustration, not a quote from any broker.
The rule never changes: spread in pips × $10 + commission, per standard lot, measured at the hours you actually trade. Our full guide to forex trading costs adds swap and slippage to the picture, and the lesson on account types works through the crossover point.
Execution: requotes versus slippage
A market maker on instant execution tends to fill you exactly where you clicked, which feels comfortable, but in a fast market you may be requoted and miss the trade. An ECN broker on market execution always fills you, but at whatever price is available, which can be better or worse. Neither is free: a requote costs you the opportunity, and slippage costs you pips. The question for any broker is whether the outcome is fair. Slippage that only ever goes against you, or requotes that only appear when the price has moved in your favour, are warning signs whichever model the broker claims to run.
Marketing labels vs reality
Broker account names are marketing, not legal categories. A regulator authorises a firm to deal as principal (taking the other side) or to act as an agent, and the firm’s legal documents will say which. The words on the account-type page are chosen to sell. The table below translates the common ones.
| Label you see | What it usually means | What to check |
|---|---|---|
| “ECN account” | Raw spread plus commission; orders routed to providers or internalised | The order execution policy: principal or agent? |
| “No dealing desk” | No manual intervention in your orders | Whether the firm still acts as counterparty |
| “Zero spread” or “from 0.0 pips” | The lowest spread seen, at the busiest moment | The average spread at your trading hours, plus commission |
| “Fixed spread” | Spread held steady in normal conditions | What happens on news: widening, requotes or suspended trading |
| “True ECN” or “100% A-book” | A claim that no flow is kept in-house | Whether the legal documents say the same thing |
“No dealing desk” and “ECN” describe how orders are handled, not whether the broker is honest or regulated. A firm’s client agreement and order execution policy are legal documents and are far more reliable than its homepage. If the agreement says the firm acts as principal on all trades, it is your counterparty, whatever the account is called.
What actually matters when you choose
The execution model matters less than four other things, in this order.
1. Regulation and the safety of your money
A well-regulated market maker is a far safer place for your money than an unregulated “ECN”. Regulation brings best-execution duties, leverage caps, negative balance protection and, crucially, the requirement to hold client money in segregated accounts, separate from the firm’s own money. Toggle the diagram below to see why that matters if a broker fails.
Whatever its execution model, a regulated broker must keep your deposit in a segregated client account, apart from its own money. Toggle to see what happens to your funds if a broker fails with and without segregation.
Always confirm a licence on the regulator’s own register rather than on the broker’s website. The lesson on regulation shows how, and our guide to forex broker scams lists the red flags that end the search immediately.
2. Total cost
Add spread, commission, swap and typical slippage for the way you trade. A model that is cheaper for a scalper placing 200 trades a month can be dearer for someone placing five.
3. Execution quality
Small slippage in both directions, few or no requotes, and fills that arrive in a fraction of a second in calm markets. This is measurable, and you can measure it yourself.
4. Transparency
A firm that explains plainly how it handles orders, publishes its policies and answers questions about its execution model has less to hide than one that answers with slogans.
How to check, step by step
Read the order execution policy. Regulated firms in the UK and EU must publish one. Look for whether the firm acts as principal or agent, which factors it uses to judge best execution, how it treats slippage, and what happens to orders in fast markets.
Read the conflicts of interest policy. It should say plainly whether the firm can profit from client losses and what it does to manage that conflict.
Look for execution statistics. Some brokers voluntarily publish figures such as average execution speed, the share of orders filled at the requested price or better, and the split between positive and negative slippage. Where they exist, they are useful; where they do not, ask.
Test it yourself. Open a small live account, because demo fills are often perfect and tell you nothing. Record requested and filled prices for twenty or so trades in calm hours and a few around a scheduled release. Slippage that goes both ways is normal. Slippage that only ever goes against you is a cost in disguise.
Drawn as bars, the example shows why headline spreads mislead. The raw account’s 0.2-pip spread is the smallest part of its cost, and the same account can be the most expensive option at the wrong moment.
Common mistakes when comparing ECN and market maker brokers
Assuming “ECN” means honest
The label describes order routing, not integrity. An unregulated firm can call every account ECN. Check the licence, the legal documents and your own fills before trusting the name.
Assuming every market maker is a scam
Taking the other side of clients is a legitimate, regulated business model. The risk comes from unregulated market makers, where nobody enforces best execution or fair pricing. Judge the regulator, not the model.
Comparing headline spreads
“From 0.0 pips” with a $10 commission can cost more than a 1-pip spread with none. Always convert to spread × $10 + commission per lot, at the hours you trade.
Judging execution on a demo account
Demo orders usually fill instantly and perfectly because no real liquidity is involved. Only a small live account shows how a broker really executes.
Choosing for features you will not use
Depth-of-market screens and raw pricing help very active traders. At a handful of trades a month, regulation and simplicity matter far more than a dollar per lot. Our broker checklist puts each factor in order.
Frequently asked questions
What is the difference between an ECN and a market maker broker?
A market maker takes the other side of your trades and quotes its own prices, usually with no commission and a wider or fixed spread. An ECN or STP broker passes your orders to outside liquidity providers and charges a commission on a raw, variable spread. Many brokers combine both models.
Is an ECN broker better than a market maker?
Not automatically. An ECN broker removes the direct conflict of interest and is often cheaper for active traders, but it brings commission and slippage. A well-regulated market maker can be simpler and just as fair. Regulation, total cost and execution quality matter more than the label.
Do market makers trade against you?
On trades they keep in-house, yes: they are your counterparty, so your loss is their gain. Most offset client positions against each other and hedge their net exposure. Regulated market makers must still give you best execution and fair prices, and must disclose how they manage the conflict.
What are A-book and B-book brokers?
A-book means the broker passes your orders to liquidity providers and earns a spread or fee. B-book means it keeps your orders in-house and acts as your counterparty. Most retail brokers run both, deciding by account size, trading history and risk, and the choice can change over time.
How can I tell if my broker is a market maker?
Read the client agreement and order execution policy. If they say the firm acts as principal, it is your counterparty on at least some trades. Look also at the conflicts of interest policy, any published execution statistics, and whether your slippage goes both ways on a small live account.
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