You clearly identified a price and placed an order, yet the executed price was not what you expected, or even resulted in a loss. This is the trader’s worst nightmare, “MT4 slippage”. Many people are confused about the reasons behind MT4 price slippage and do not know how to avoid trading slippage, watching their profits disappear. Slippage is an unavoidable phenomenon in forex and CFD trading, but it is not unmanageable. From the perspective of an experienced trader, this article will give you an in depth explanation of the fundamental causes behind slippage and provide practical, actionable strategies to help you effectively control slippage risk and protect the hard earned results of your trades.
Before putting real money into the market, it is crucial to fully understand the definition of slippage. Simply put, slippage is the difference between your “expected execution price” and the “actual execution price”. When you press the buy or sell button on MT4, your order takes time to reach the dealer’s server, where it is then matched and executed. Within those few milliseconds to a few seconds, the market price may already have changed, causing the final execution price to differ from the price you saw when placing the order.
Imagine this: you see a bottle of milk in the supermarket priced at 100 dollars, but when you reach the cashier, the staff says, “Sorry, the headquarters just updated the price, it’s now 102 dollars.” The extra 2 dollars is a real life example of “slippage”.
The same concept applies entirely in financial trading. For example:
The $0.05 difference in between is the slippage for this trade. This seemingly tiny number can accumulate into a substantial potential loss in large trade volumes or high frequency trading. Therefore, understanding and managing MT4 slippage is essential for every trader.
Many beginners fear the word “slippage”, but slippage can be positive or negative, and it is not always a bad thing. Understanding the difference helps you view this market phenomenon more objectively.
A trustworthy trading platform should execute trades fairly, allowing both positive and negative slippage to occur, rather than only negative slippage that disadvantages clients.
After understanding what slippage is, the next step is to explore its causes. Only by knowing the reasons behind MT4 price slippage can you find the proper solutions and learn how to avoid trading slippage. Below are the five most common culprits:
This is the primary cause of slippage. When the market experiences intense volatility, prices can jump rapidly within an extremely short time. For example, when the US releases Non Farm Payroll (NFP) data, when the Federal Reserve (Fed) announces an interest rate decision, or when unexpected black swan events occur, market prices can swing up and down by dozens or even hundreds of points within seconds.
In such conditions, prices often “run away” during the delay between your order placement and execution, making the probability of slippage almost 100%. It is like trying to catch a falling leaf in the middle of a storm, extremely difficult.
Liquidity refers to how many buyers and sellers are available in the market. When liquidity is high, there are plenty of orders on both sides, and your order can easily find a counterparty at your expected price. Conversely, when liquidity is low and market depth is insufficient, your order may need to match with worse prices in order to be executed, resulting in slippage.
Common low liquidity periods include:
This is a technical MT4 slippage factor. Your trade order must be transmitted through the internet to the dealer’s server. Any delay in this process increases the risk of slippage.
Different forex brokers use different order execution models, and this directly affects the occurrence of slippage. The main types are as follows:
For more guidance on choosing a broker, you may refer to the article: How to Choose a Forex Broker? Seven Factors to Help You Find the Right Platform.
The type of order you choose is a key factor that determines whether slippage will occur. Many beginners like using “Market Orders”, believing they provide the fastest execution, but they are also the order type most prone to slippage.
After understanding the various MT4 slippage causes, we can finally move on to the most important part: how to avoid trading slippage. Although slippage cannot be eliminated 100%, the following three strategies can help you minimize its negative impact.
This is the most direct and effective anti-slippage strategy. Instead of chasing prices in an unpredictable market, set your ideal entry or exit price in advance.
By using limit orders, you are effectively telling the trading system, “I accept only this price or better, otherwise, I prefer not to trade.” This shifts you from passively accepting market prices to actively controlling your execution cost.
Since we know that high volatility and low liquidity are breeding grounds for slippage, avoiding these periods is a wise move. As a smart trader, you should have a basic understanding of the economic calendar.
This is a practical built in MT4 tool that many traders do not know how to use. In the order window, you can find an option called “Maximum Deviation”. The value you set here represents the maximum slippage range (in points) you are willing to accept.
How to set it:
Once set, if the actual slippage exceeds the range you specified, the order will not be executed, protecting you from large slippage. However, note that during periods of high volatility, setting the deviation too strictly may also cause your orders to remain unfilled.
A: Yes. As long as the broker uses an NDD (ECN/STP) model that connects directly to the real market, slippage is a normal market phenomenon because no one can control rapid price movements. In fact, you should be cautious of Market Maker brokers who claim “zero slippage”, as they may compensate for risk through other methods (such as widening spreads or issuing re-quotes). For a good broker, the key is not the absence of slippage, but whether the slippage is fair and symmetric, and whether the server executes quickly to minimize slippage as much as possible.
A: Unfortunately, the official MT4 mobile app (iOS and Android) does not include the “Maximum Deviation” setting. This function is available only in the desktop version. Therefore, if slippage control is important to you, it is recommended to execute critical trades using the MT4 desktop platform.
A: For legitimate and regulated brokers, slippage is not a scam but an unavoidable technical and market reality. However, it is true that some bad brokers may use malicious slippage to harm clients, such as only generating negative slippage against clients and never showing positive slippage. This is why choosing a reputable and strictly regulated broker is crucial.
In summary, MT4 slippage is an unavoidable bump in the trading journey, but it is far from an uncontrollable beast. By understanding the five major MT4 slippage causes — market volatility, liquidity, network latency, platform execution models, and order types — and by taking the correct preventive measures, you can significantly reduce its impact. Mastering how to avoid trading slippage, such as using limit orders, avoiding high risk periods, and making good use of maximum deviation settings, is an essential step in progressing from a beginner to a mature trader. Review your trading habits and MT4 settings now, choose a broker with fast and transparent execution, and begin your journey toward steady and disciplined trading!
