What “ECN broker” means before you evaluate it
An ECN broker is commonly described as an execution model where a broker routes orders to an external network of liquidity providers rather than treating every trade as purely internal. In practice, “ECN” can be used differently across providers, so you should treat it as a concept to verify through documents, not as a promise of better outcomes. The core idea to evaluate is the order path: where your order goes, how it is matched, and what rules apply when conditions change.
Start by separating stable mechanics from variable conditions. Stable mechanics include the contractual execution/routing description and the fee structure. Variable conditions include spreads, liquidity depth, latency, and market volatility. If a provider markets “ECN,” you still need to confirm what that means in its own legal and operational documents.
Evidence to collect: documents and disclosures (afvinkpunten)
Use a document-first checklist. Look for evidence you can read and compare, rather than marketing claims.
- Terms of business and trading conditions
- Find sections describing order execution, routing, and matching.
- Identify how the broker handles conflicting interests (for example, when liquidity sources differ).
- Cost transparency
- Confirm how commissions, spreads, and any markups are calculated.
- Make sure you understand whether costs can change with volatility or liquidity.
- Execution policy and order handling
- Check how orders are processed (for example, market vs. limit), and how partial fills are treated.
- Identify what happens during low liquidity or fast markets (how the broker describes deviations from expected prices).
- Customer protections and dispute handling
- Review complaint and dispute procedures.
- Note any limits on compensation and the process required to escalate issues.
- Routing and “liquidity” definitions
- Verify what “external liquidity” means in the broker’s own wording.
- Look for descriptions of which counterparties can be used and under what circumstances.
This approach helps you build a clear “proof of document” picture: what the provider promises contractually about execution and costs.
Example calculation with assumptions (and what it cannot prove)
To ground your evaluation, do a simple cost-and-price sensitivity check. Assume:
- A commission cost per lot (from the broker’s fee schedule).
- A spread at entry and spread at exit (you choose representative values; do not assume future spreads).
- A slippage estimate as a range under stressed conditions (because execution can differ from quotes).
Then compute a rough expected cost for a round trip using your chosen assumptions (commission + spread + any described execution differences). The calculation is not a prediction; it is a way to quantify which component could dominate when conditions are worse than “normal.” If small changes in spread or slippage swing results heavily, that is a material limitation you should recognize.
Material limitations and failure modes (rode vlaggen)
Even if “ECN” is explained in documents, several material limitations can affect outcomes:
- Quoted prices vs. executed prices: In fast markets, actual fills may differ from the last visible quote.
- Liquidity gaps: External liquidity can disappear or thin out, changing fill quality and speed.
- Routing complexity: “External routing” does not automatically mean “best available price,” because execution quality depends on the interaction of routing rules, liquidity, and timing.
- Cost structure changes: Commissions and effective spreads can behave differently across volatility regimes.
- Partial fills and re-pricing: Orders may be filled in segments with different effective prices.
A practical “klaarcriterium” is whether the broker’s documents let you understand these points clearly enough to model costs and failure modes without relying on marketing language.
Verification checklist and next questions (klaar om te vergelijken)
To verify independently, match three layers:
- Concept layer: Does the broker’s wording support an order-routing interpretation consistent with the ECN concept?
- Contract layer: Do the terms explain execution handling during stressed conditions and define how deviations are treated?
- Economics layer: Do you understand all fees and how they combine into effective trading cost?
If any of these layers is vague, inconsistent, or missing, treat it as a warning sign. Also avoid using past performance as evidence of future results; relationships can break when spreads, liquidity, or execution conditions change.