What Is an Execution Broker?

What an execution broker does in the order flow

An execution broker takes a client’s instruction to buy or sell and gets it done with a market, an exchange or a liquidity provider. The client sees one account and one order ticket, but the order usually passes through several systems before it fills. The broker’s duties centre on three things: where the order goes, what price it can fill at, and what record it keeps of the result.

The figure below shows the chain used in this guide: client, broker platform, venue or liquidity provider, fill, and the execution report sent back. Who owns each link is the first question to answer when you assess a provider.

The term describes a function, not a licence category. One firm can act as an execution broker for some orders and take the other side of others. Read the client agreement and the order execution policy rather than relying on the label in marketing.

Order flow from click to fill

A simple market or limit order follows six steps. Each step can fail or delay the trade, so a sound execution setup logs every one of them.

1. The client submits an order through the trading platform, such as MT5 or cTrader.
2. The platform checks account permissions, symbol settings, margin and any dealing rules, then passes the order onward.
3. The broker decides the route: its own book, an outside liquidity provider or an electronic venue, under its written routing rules.
4. The venue or provider accepts, rejects or partly fills the order at a price it can offer at that moment.
5. The fill, or the reason for rejection, returns to the platform and the client with a timestamp.
6. The firm reconciles the trade record against the provider statement and its own ledgers.

Order type changes the outcome. Read about market orders and limit orders in the knowledge base. Partial fills matter too: an order for 10 units can fill as 6 and 4 at different prices, and the client needs both fills in the record.

Agency or principal: who takes the other side

The most useful distinction is whether the firm acts as an agent or as a principal. An agency execution broker routes the client’s order to a market or provider and earns a commission or fee, without taking a position against the client. A principal, or dealing-desk, model can fill the order from the firm’s own book, so the firm’s gain or loss can move opposite the client’s.

The SEC’s investor bulletin on trade execution explains that a broker decides where an order is sent and may fill it from its own inventory, which the SEC calls “internalization”. A market maker is a firm that stands ready to buy or sell at publicly quoted prices. Our market maker definition covers that role on its own terms.

STP, ECN and market maker models in one table

These three labels appear often in broker marketing. They describe how an order is passed on, not a fixed legal category, and they overlap. The table gives a plain description of each so you can read a broker’s own wording. It does not rank them or compare costs, because those depend on the instrument, the provider and the contract.

• STP (straight-through processing)
  What it describes: Orders passed on electronically to one or more liquidity providers, without manual dealing
  Who the counterparty usually is: One or more liquidity providers, under the firm’s agreements
  Read more: Order execution
• ECN (electronic communications network)
  What it describes: An electronic system that matches buy and sell orders at specified prices
  Who the counterparty usually is: Other participants whose orders are displayed and matched on the system
  Read more: Liquidity bridge execution
• Market maker
  What it describes: A firm that stands ready to buy or sell at quoted prices
  Who the counterparty usually is: The firm itself, from its own inventory or hedged book
  Read more: Market maker definition

A single broker can describe itself with more than one label, and the mix can differ by instrument. Treat each label as a prompt for questions, not as proof of a price or a fill quality.

What does ECN mean in forex trading?

ECN stands for electronic communication network, also written electronic communications network. The US SEC describes ECNs as electronic trading systems that automatically match buy and sell orders at specified prices. The name describes the venue type. It does not guarantee a price or fill quality.

In forex, brokers often use “ECN” to describe prices pulled from several liquidity providers onto one feed. That is a commercial usage and does not always match the regulatory meaning. Ask which venues or providers stand behind the prices you see, and whether they can be checked against a record.

STP vs ECN broker: what to ask instead

Many searchers ask whether an STP or an ECN broker is better. The label alone does not answer that. A useful reply covers the questions below, and they apply whatever label the firm uses.

• Who is the counterparty for each order: a provider, a venue, or the firm itself?
• Can the firm decline or internalise an order, and is that routing rule written down?
• What is the total cost per trade, including commission, mark-up, swaps and any fees, and how is each one shown?
• How are rejections, partial fills and requotes reported to the client?
• Which execution statistics does the firm provide, for which instruments and over what period?

Ask for the answers in writing, then compare providers on the same test instruments and the same order sizes.

Partial fills and the execution record

Partial fills are where an execution broker’s record matters most. The worked case below uses hypothetical numbers to show why the average price alone is not enough.

A report that shows only the average hides the second fill and the time it occurred. Ask for fill-level records and keep them, because reconciliation and any client query depend on them.

Best execution duties and what to check

Where a regulator applies, an execution broker is expected to seek the best result reasonably available for the client, measured on more than the headline price. For MiFID business in the UK, best execution duties sit in COBS 11.2A of the FCA Handbook. In summary, a firm must take sufficient steps to get the best possible result for its clients, weighing factors such as price, costs, speed and likelihood of execution, and to keep an order execution policy.

The SEC’s investor bulletin on trade execution describes a broker’s duty to seek the best execution that is reasonably available. Neither framework guarantees the best price on every order. They set process duties. Apply the rule in your own jurisdiction to your own activity, and take legal advice before relying on any rule described here.

• A written order execution policy that names the venues or providers used and the factors that decide routing.
• Routing rules that someone can audit and that match what the client agreement says.
• Fill and rejection logs kept with timestamps and tied to the client account.
• Periodic review of execution results against the policy, with a documented decision when a venue is changed.

Where FxTrusts fits in execution

FxTrusts is a technology provider, not a broker, bank or regulated financial institution. It does not act as the execution broker for any client, and it does not supply the liquidity itself under this guide’s scope. Its role on the execution path is the technology in the signed contract.

The FxTrusts liquidity page describes connecting a broker to a liquidity provider through a scoped bridge, gateway or FIX link, with routing controls, reconciliation and acceptance tests. The liquidity counterparty is named in the broker’s own agreement with that provider. For how bridges translate orders and reports, read liquidity bridge execution answers.

For the business model behind spreads and dealing income, read how forex brokers make money before you compare execution arrangements.