When you ask a broker “Do you use ECN, STP, or Market Maker order routing?”, you’re really asking two linked questions: what technical plumbing the broker uses to execute trades, and what incentives sit behind that plumbing. The execution model matters because it affects spreads, commissions, execution speed, the chance of requotes, and whether the broker is a neutral router or a counterparty to your trades. Below I explain the three common models in plain language, show how to verify what a broker actually does, give practical examples of how different models behave in live markets, and flag what to watch for when you investigate. Trading carries risk; this is educational material, not personal advice.
What the three models mean in practice
The terms ECN, STP and Market Maker describe different ways orders flow through a broker’s systems. At a basic level the difference is whether the broker sends your order into wider market liquidity (an external book) or fills it from inside its own systems.
ECN (Electronic Communication Network) describes a setup that connects participants—banks, hedge funds, other brokers and retail clients—to a shared electronic book. Prices you see are aggregated from multiple participants and trades are matched inside the network. ECN-style accounts typically show very tight raw spreads and charge a commission per trade. Traders can sometimes see level‑2 depth and real order matching. In practice, ECN is attractive to scalpers and high-volume traders who need the narrowest possible spreads and minimal broker intervention.
STP (Straight‑Through Processing) means the broker’s systems automatically forward orders to one or more liquidity providers without a dealing desk intervening. STP brokers often aggregate prices from several providers and may add a small markup to the spread as their revenue. The trader gets market-based pricing but usually without the raw level‑2 depth and sometimes without a separate commission line — the cost is built into the spread. STP is often presented as a middle-ground: more transparent than a pure Market Maker, simpler than a raw ECN.
Market Maker (sometimes called Dealing Desk) brokers create and fill their own prices from an internal book. The broker can be the counterparty to your trades and may choose when to hedge exposure externally. Market Makers commonly offer fixed or advertised spreads and may not charge a separate commission. The tradeoff is that the broker’s profit can be correlated with client losses, which introduces a potential conflict of interest unless the broker operates with strict controls and clear disclosure.
Many real-world brokers operate hybrids: they may offer distinct account types (one account routed A‑book to LPs, another handled in-house), or they may route some trades externally and internalise others. So the labels you see in marketing are a starting point, not always the full story.
Why the model matters to you
Order-routing model affects four practical aspects of trading: cost, execution quality, transparency and restrictions. Cost is not only spread; commissions, markups and slippage all matter. Execution quality covers latency, fills and requotes. Transparency tells you whether you can audit fills and see real market prices. Restrictions include limits on scalping, hedging or using automated strategies.
Imagine a fast news release. In an ECN or STP environment, your order will be sent to matching liquidity providers; spreads can widen but the order is being worked against external liquidity. With a Market Maker, the broker may freeze prices, widen spreads sharply, or refuse execution until conditions stabilise—actions that can protect the broker’s exposure but hurt your trade. For a scalper trying to capture fractions of a pip, that difference can be decisive. For a swing trader holding positions through noise, fixed spreads might feel more predictable, even if they’re wider on average.
Execution model also affects the real cost of a strategy. A low advertised spread with a hidden markup or frequent slippage may be more expensive than a slightly wider but stable STP spread. ECN’s commission + near‑zero raw spread can be the cheapest at high volumes but less attractive for very small accounts where commissions eat into returns.
How to find out which model your broker actually uses
Brokers sometimes use marketing language that blurs the technical reality. To verify the execution model, take a stepwise approach: read the broker’s official documents, inspect pricing and fills on an account, and ask for evidence. Begin with the broker’s execution policy and terms and conditions; these should state whether the broker acts as principal (fills from an internal book) or agent (routes to liquidity providers). If the policy is vague, that’s a warning sign that requires follow‑up.
After reading disclosures, test the product practically. Open a demo or small live account and do tests during quiet times and around scheduled news. Place market and limit orders, check whether you receive re‑quotes, how fills compare to prices on an independent feed, and whether spreads widen dramatically at news. Request post‑trade reports — a credible broker will provide time‑stamped trade confirmations that show the price at which the order was executed and (ideally) the liquidity provider or route used.
To make it easier, here’s a checklist you can follow when you contact support or compliance; start with a paragraph explaining you will ask these and then use the bullets.
- Ask for the broker’s written Order Execution Policy and a plain‑language explanation of whether you are trading against the broker or through to external liquidity.
- Check whether different account types are A‑Book (external routing) or B‑Book (internal execution) and whether that choice is made by the client or the broker.
- Request recent execution quality statistics: average spreads, fill rates, slippage rates and the time period for these reports.
- Ask whether the broker publishes a list of liquidity providers or can show trade confirmations that identify the routing destination.
- Look for evidence of segregated client funds and independent audits — these don’t prove model type, but they raise confidence in operational transparency.
- Run practical tests on demo: compare the broker’s live prices to independent market sources and observe behavior during scheduled news.
If a broker refuses to provide even basic execution documentation, or offers only general marketing claims without evidence, treat that as a red flag.
What evidence good brokers provide
A broker using honest, external routing will typically give you several pieces of verifiable evidence. The most useful is a trade confirmation showing the exact timestamp, executed price, and whether the order was routed to a named liquidity provider. Some brokers publish monthly execution quality reports that include average spreads, percentage of orders filled at requested price, and statistics on slippage by instrument and time of day.
Platforms can also reveal clues. Access to level‑2 order book depth or ECN‑style matching screens indicates closer-to-market routing. For STP brokers you might see variable spreads with no obvious commission line; for ECN you’ll usually see raw spreads with a clearly stated commission. A broker that supplies an audit trail, connectivity diagrams, or third‑party verification is easier to trust.
Red flags and questions to ask
When you probe a broker’s execution model, certain answers should make you cautious. Start by telling support you’re doing due diligence, then watch both what they say and what they provide in writing. If their responses are vague or they refuse to share execution statistics, that’s concerning.
Watch out for the following warning signs:
- Guarantees of “no slippage” or “guaranteed fills” in all conditions.
- Zero commissions and consistently zero spreads across all market hours.
- Refusal to provide execution reports, trade confirmations with timestamps, or a clear execution policy.
- Claims that every client is on the same “ECN” feed, but platform behaviour shows frequent requotes and widened spreads during normal volatility.
- Difficulty withdrawing funds or repeated delays in client fund movement (not a direct model issue but an operational red flag).
- Overly aggressive marketing promises about guaranteed profits or insider access.
If you encounter these, either seek more detailed written answers or consider an alternative broker.
Practical examples: how models behave in real situations
Putting these ideas into short narratives helps. Picture three traders:
A scalper working 1–5 minute setups notices that on Broker A spreads are consistently 0.1–0.3 pips and a small commission is charged per lot. During tests around economic releases, fills remain fast and requotes are rare. That’s typical ECN/STP A‑Book behaviour; the scalper benefits from low micro‑spreads. If the same scalper used Broker B (a Market Maker with “fixed” 1 pip spreads), the spreads are stable but wider; during news, the broker widens to 5–10 pips or suspends trading, eroding the scalper’s edge.
A swing trader keeps positions for days. They prefer predictable holding costs. Broker C, a Market Maker, offers fixed spreads and no commission, which can make cost calculation simpler. However, if Broker C internalises trades and frequently internalises profitable accounts, the swing trader should check that the broker hedges exposure and has transparent rules for client segmentation.
An institutional‑sized order (large volume) placed at the open requires deep liquidity. An ECN connected to multiple banks will likely fill larger chunks across the aggregated book without moving price as much, while a small Market Maker may have to hedge gradually or route portions externally, potentially affecting execution and slippage.
These examples show that the right model depends on your strategy, volume and sensitivity to micro‑costs versus predictable costs.
Risks and caveats
The execution model is only one element of execution quality. Technology architecture, server co‑location, the broker’s choice of liquidity providers, how they manage latency, and risk‑management practices all affect your fills. A broker claiming ECN routing can still present poor execution if their pipes to liquidity providers are slow or if they only connect to a narrow set of providers. Conversely, a well‑run Market Maker with clear disclosure and proper hedging can offer competitive trading for certain styles.
Also remember that differences you observe in spreads and fills can come from market liquidity and instrument characteristics. Major pairs in London/New York overlap tend to have the tightest spreads regardless of model, while exotic pairs show larger divergence.
Finally, trading carries risk of loss; nothing about a broker’s model eliminates market risk or guarantees profitable trades. This article is educational and not personalised trading advice
References
- https://www.skyriss.com/guides/ecn-vs-stp-vs-market-maker-brokers-which-model-is-best-in-2025
- https://www.tradetaurex.com/forex-insights/types-of-forex-brokers/
- https://tsgbrokers.com/stp-vs-ecn/
- https://fxbackoffice.com/blog/stp-vs-ecn-forex-brokerages-which-model-should-you-launch-2025-0/
- https://www.avatrade.com/trading-info/broker-type
- https://eli-uk.com/news/ecn-stp-vs-market-maker-brokerage-model/
- https://centerpointsecurities.com/order-routing-guide/
- https://www.dailyforex.com/forex-brokers/best-forex-brokers/market-makers