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By Joanne Cassar / 24. Sep 2026
IC Markets - Regulated By FSA
A forex broker slippage comparison can reveal important differences between brokers that may not be visible from advertised spreads alone.
Two brokers can offer similar EUR/USD spreads but produce different execution results when markets move quickly. One may experience relatively small price differences between requested and executed prices, while another may show greater slippage under the same conditions.
Slippage is particularly relevant to scalpers, day traders, news traders, and automated strategies.
However, comparing slippage requires more than finding a broker with the lowest published number. Slippage varies with market volatility, order type, position size, liquidity, account type, server location, and execution technology.
Slippage occurs when an order is executed at a different price from the price expected or requested when the order was submitted.
For example, suppose EUR/USD is quoted at 1.10000 and you submit a market buy order.
If the trade executes at 1.10008, the difference represents negative slippage for the buyer.
Slippage can also be positive.
If the order executes at a better available price, the trader may receive price improvement.
FOREX.com, for example, explains that slippage can occur when a fast-moving market changes before an order reaches the market.
Several factors can contribute to slippage.
Fast-moving markets can change prices between order submission and execution.
When fewer executable prices are available, larger orders may move through multiple liquidity levels.
The longer an order takes to reach the broker's infrastructure, the more opportunity there is for the market to move.
Server technology and order-routing systems can influence execution.
A large order may not be filled entirely at the best available price.
Events such as inflation data, employment reports, and central-bank decisions can produce unusually rapid price changes.
A useful comparison should include more than one metric.
| Metric | What It Tells You |
|---|---|
| Average slippage | Typical price difference |
| Negative slippage | Potential adverse execution |
| Positive slippage | Potential price improvement |
| Percentage at requested price | Execution consistency |
| Average execution speed | Processing efficiency |
| Spread | Normal transaction cost |
| News-time spread | Volatility-related cost |
| Order rejection | Execution reliability |
| Partial fills | Liquidity/order-size behavior |
A broker that publishes several of these measurements provides more information than one that only advertises a minimum spread.
When conducting a forex broker slippage comparison, distinguish between:
Broker-reported statistics
and
Independent testing.
Broker-reported figures can provide useful transparency, but they may cover a particular account, platform, time period, and population of orders.
Independent testing can provide another perspective, but it also depends on the testing environment.
CompareForexBrokers explicitly says its execution tests are intended for relative comparison and should not be interpreted as guaranteeing performance at all times.
That distinction is essential.
Imagine Broker A advertises:
0.0 pip spread
while Broker B advertises:
0.8 pip spread.
At first glance, Broker A appears cheaper.
But suppose Broker A experiences greater negative slippage during your trading sessions.
The actual cost may be different from the headline spread.
A better formula is:
Effective trading cost = Spread + Commission + Slippage + Financing
For short-term strategies, slippage can be particularly important because the expected profit per trade may be relatively small.
News events can dramatically change execution conditions.
Before a major announcement, EUR/USD may have a relatively stable spread.
Immediately afterward:
Therefore, a broker's normal-market slippage statistics may not tell you how the broker behaves during the exact conditions used by a news strategy.
If you are a news trader, ask:
“What happens to execution when volatility increases?”
rather than:
“What is the average slippage?”
Scalpers can be especially sensitive to slippage.
Suppose a strategy aims to make 3 pips per trade.
If average negative slippage is 0.5 pip, that represents a meaningful portion of the expected move.
Now multiply that difference across hundreds or thousands of trades.
This is why scalpers should compare:
For a practical comparison, create a spreadsheet with:
Then calculate:
Average slippage
Median slippage
Maximum negative slippage
Maximum positive slippage
Percentage of trades with zero slippage
This gives a more useful picture than a single promotional statistic.
Slippage can behave differently depending on order type.
Market orders are executed at available market prices, so the final price can differ from the displayed price.
Limit orders generally specify the maximum or minimum acceptable price.
For example, a buy limit is intended to execute at the specified price or better, subject to the broker's execution rules.
FOREX.com explains that its limit orders are filled at the requested price or better under its stated conditions.
Always check the specific broker's order-execution policy.
Focus on:
Average slippage + spread + commission + execution speed
Focus on:
Slippage during volatility + spread widening + liquidity
Focus less on millisecond differences and more on:
Spread + financing + execution reliability
Focus on:
Latency + slippage + server location + execution consistency
There is no universal number that applies to every broker, pair, order size, and market condition. Compare slippage under the specific conditions in which you trade.
There is no permanent universal leader because slippage changes with market conditions and testing methodology. Independent tests should be evaluated alongside broker-published data.
Yes. A trade can sometimes execute at a better price than the one requested.
Yes. Slippage can occur because forex prices can change between order submission and execution.
Potential approaches include improving network connectivity, using a suitable VPS for automated trading, avoiding extremely illiquid conditions, and understanding order types and execution settings.
A proper forex broker slippage comparison should never rely on one number.
Compare:
Slippage + spread + commission + execution speed + liquidity.
Most importantly, compare brokers under the market conditions relevant to your strategy.
