This guide gives you a consistent method for reviewing those details. It complements our guide to what happens behind every forex order, which explains how pricing, orders and execution fit together.
Why one trade doesn’t tell you much
A single fill can be affected by the instrument, order type, trade size, market activity and timing. A fill during a quiet session is not directly comparable with one during a major announcement or a thin market.
That’s why execution should be reviewed across a set of records and grouped by similar conditions. The goal is to understand patterns—not to prove that a provider will always deliver a particular price.
Build a consistent trade log
Use existing account statements and order history where possible. Don’t place trades solely to test execution or risk money you can’t afford to lose.
Record these details for each order:
| Date and time | Include the time zone shown by the platform |
| Instrument | For example, EUR/USD or XAU/USD |
| Order type | Market, limit, stop or another type |
| Direction and size | Buy or sell, plus the position size |
| Market conditions | Normal activity, news period, rollover or holiday |
| Price at submission | Record the quote you observed when sending the order |
| Fill price | Record the executed price from the statement |
| Spread and commission | Use the charges shown for that order |
| Slippage | Calculate the difference between observed and filled price |
| Order result | Filled, partially filled, rejected or cancelled |
For a fair comparison, use the same instrument, order type, approximate position size and market window. Keep unusually volatile periods in a separate group instead of mixing them with normal conditions.
Calculate slippage consistently
Slippage is the difference between the price you expected when submitting an order and the price at which it was filled. It can be favourable or adverse.
For EUR/USD, one pip is usually 0.0001. If a buy order is submitted when the observed ask is 1.10000 and fills at 1.10003, the fill is 0.3 pip higher than the observed price—adverse slippage for that buy. For a sell order, a lower fill price than expected would generally be adverse.
Record favourable and adverse slippage separately. Reporting only a net average can hide the size or frequency of unfavourable fills.
Metrics to review
Average quoted spread
Add the spreads observed in your sample and divide by the number of observations. Compare similar times and instruments.
Adverse-slippage frequency
Count orders filled at a less favourable price than the price observed at submission, then divide by the total filled orders.
Average adverse slippage
Add the adverse slippage values and divide by the number of affected orders. Keep favourable slippage in a separate measure.
Rejection or partial-fill rate
Count rejected or partially filled orders and compare them with total submitted orders. Note the market conditions and order types involved.
These measures describe your sample. A small or uneven sample cannot establish how a provider will perform in every market condition.
Compare the full execution cost
Execution cost is more than slippage. For a useful comparison, consider:
Estimated trade cost = spread cost + commission + adverse slippage cost + financing and other applicable charges
The monetary value depends on the instrument, contract specification, position size and account currency. Check the provider’s documents and account statement rather than applying a generic pip value.
For context on how spread, commission and financing fit together, read SmartFin’s guide to the real cost of forex trading.
Compare like with like
Before drawing a conclusion, separate your records into comparable groups:
- Instrument: EUR/USD results should not be mixed with gold or a less liquid currency pair.
- Order type: A market order and a pending order may behave differently.
- Market period: Normal conditions, major news and rollover are different environments.
- Position size: Larger orders may have different execution outcomes.
- Platform time: Confirm whether the displayed time is UAE time or the provider’s server time.
A provider may have different instrument hours, spreads and execution terms. Review the account documents and execution policy for the specific entity named in your agreement.
Understand the order type
A market order requests execution under the available conditions when the order reaches the provider. A limit order has a price condition, but it may not fill if the market does not reach an executable level. A stop order can trigger when its condition is met, while the eventual fill may still be affected by a fast market or price gap.
The trigger price and the execution price are not always the same thing. Review the provider’s order-handling terms and understand how your selected order works before using it.
For a broader overview of order processing, return to Your Forex Broker Is More Than a Trading Platform: What Happens Behind Every Order.
Who provides your account matters?
When assessing execution, first identify the company responsible for the trading account and orders. A website brand, an introducing company, the platform, and the account provider may have different roles.
Read the client agreement and identify the legal entity. Then check its regulator, permitted activities, execution policy, costs, and complaints process. SmartFin’s page on who provides your SmartFin trading account explains what to check in the account documents.
Frequently asked questions
-Does fast execution guarantee a better fill?
No. Execution speed alone does not guarantee a particular price. The available price can change while an order is being processed.
-Is slippage always negative?
No. Slippage can be favourable or adverse. Track both separately so the review shows the distribution of outcomes.
-Can I compare execution using demo accounts?
A demo can help you learn how the platform and order controls work. It does not necessarily reproduce live liquidity, pricing, or execution, so don’t treat demo results as proof of live execution quality.
How many trades should I review?
There is no universal number that proves execution quality. Use enough records to include comparable conditions, and label the review as limited if the sample is small.
Conclusion
To compare forex broker execution, use a consistent set of order records and account for instrument, order type, size, time, and market conditions. Review spreads, commissions, slippage, fills and rejections together. Then compare what you observed with the provider’s published terms.
Risk warning: Forex and CFDs are complex, leveraged products and carry a high risk of loss. This article is for general information and is not investment advice or a recommendation to trade.
