What is trading latency and how does it affect execution?

What is trading latency and how does it affect execution?

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When you place a trade, the expectation is that the order will get executed at the price you specified. But does this really happen every single time? Even a delay of a few milliseconds can matter in fast-moving markets, although execution outcomes also depend on factors such as liquidity, order type and market conditions.

So, what is trading latency, and how do you manage it? It needs more than a fast internet connection. The trading platform, broker's infrastructure, order routing and market conditions can all influence trading execution speed.

What is trading latency?

Trading latency is the total time an order takes to travel from your device to the broker's server and back with a confirmation.

Latency refers to the time information or an order takes to travel through the trading system. It is commonly measured in milliseconds (ms). There is more than one type of latency. Market-data latency is the delay before a price update reaches the trader’s screen, while order execution latency refers to the time taken to send an order for processing and receive a response or execution confirmation.

These delays are connected, but not identical. A trader may see a quote quickly while an order takes longer to process. Remember that a fast order response does not guarantee that the order will be filled at the price displayed when it was submitted.

Latency matters because market prices keep changing while orders travel through the system. Longer delays can increase the chance that the available price changes before an order is executed. The UK’s Financial Conduct Authority (FCA) includes latency among the metrics that wholesale banks use to assess execution quality. The importance of speed varies by market, order type and trading strategy.

What causes high trading latency?

Latency can arise at several points between a trader’s device and the system that processes the order. Identifying the source helps determine what can realistically be improved.

Internet connection and network routing

A weak Wi-Fi signal, congested network or unstable mobile connection can delay communication with the broker. The route taken by data is also important. When a connection passes through more network points or travels a greater physical distance, it can take longer than a route that is direct. A fast broadband package can play a role but connection stability, routing and packet loss can also affect response times.

Trading platform and your device

An old laptop, a loaded desktop or a platform running too many indicators could slow the first stage. Automated strategies can suffer because every additional calculation may delay the signal. This doesn’t necessarily mean the broker is slow. The delay may occur before the order leaves your device. An inefficient algorithm or repeated requests can slow down the process, even when the underlying infrastructure is fast.

Your broker’s infrastructure and routing

When an order reaches the broker, it might pass through multiple systems for validation, risk checks and routing.

Each stage can add to the processing time. Server performance, system capacity and connections between providers can influence the time taken. If your broker’s server is located in a data centre close to the liquidity provider, it can cut travel time.

Market activity

Latency can become more noticeable when there are big economic announcements. It also comes into play when markets open or during similar periods of heavy activity. Networks and trading systems face increased demand during such times. Rapid price changes can make even a small delay much more impactful. Volatility adds to the load. During news releases, thousands of orders may hit the system, all at once. Servers queue requests and orders take longer to fill. Conditions in 2026 show how quickly this can happen. Spot gold fell 1.6% in a single session on 7 October, and retail brokers handled US$33.6 trillion in monthly volume in Q1 2026. Busy, fast markets test every part of the chain.

How does latency affect trade execution?

The practical effect depends on the order, market conditions and strategy.

The execution price may differ

Suppose EUR/USD is priced at 1.10000 when a trader submits a market order to buy. But the price rises to 1.10010 before the order is processed. The order gets filled at the new price, depending on the broker’s execution process and the available liquidity. The difference is 0.00010 (one pip). That does not sound like much. But it adds up and impacts traders’ cost calculations. This is not a cost of latency, as the price could well move in the trader's favour.

Missed trading opportunity

Some strategies rely on entering or exiting a position around a specific price. If the market moves through that level before the order is processed, the trader may receive a less favourable fill or no fill at all. This can be especially relevant to scalpers, who seek to capture small price movements across multiple trades. A delay that seems insignificant for a longer-term position may have a significant impact on a strategy with narrow targets.

Automated strategies may fail

Trading algorithms analyse price changes and submit orders much faster than is humanly possible. But automation does not remove network and processing delays. If an algorithm receives market data late or its order takes too long to reach the execution system, the market conditions that triggered the trade may already have changed. This is one reason automated traders assess both the quality of their data feed and the time taken to process orders.

Slippage can occur

Latency is a delay and slippage is a difference between the expected or requested price and the actual execution price. Latency can contribute to slippage because prices may change while an order is being transmitted or processed. However, slippage can also occur because of volatility, liquidity conditions, order size and the available prices in the market. Slippage is not always negative. If an order is filled at a better price than expected, the result is positive slippage. If the execution price is worse, it is negative slippage. Furthermore, low trading latency doesn’t completely remove slippage. Prices can change rapidly, and there may not be enough liquidity at the requested price to fill an order in full.

How can traders reduce execution delays?

Once you understand what trading latency is, the obvious next question is: how can delays be minimised? Traders cannot control every part of the execution process, but they can reduce avoidable delays and choose their trading setup more carefully.

• Check your connection: Use a stable internet connection and, where practical, test a wired connection against Wi-Fi. Look for repeated interruptions rather than focusing only on headline download speeds.
• Keep your platform and device updated: Close unnecessary apps and make sure the trading software is running properly. If delays occur repeatedly, compare performance across devices or connections.
• Review the broker’s execution arrangements: Look beyond claims about speed. Consider the broker's infrastructure, available liquidity, execution model and published information about order handling.
• Consider a virtual private server (VPS): A VPS can run a trading platform or automated strategy on a remote server closer to the broker’s infrastructure. This may reduce network delays for some setups, although the benefit depends on server location, routing and the trader’s existing connection.
• Use order types carefully: A market order prioritises execution at available prices, while a limit order sets the price at which the trader is willing to buy or sell. A limit order can provide price control, but it may not be filled. Neither order type removes every execution risk.
• Test before changing your strategy: Compare execution records across different sessions and market conditions. If your platform provides timestamps, review the time between order submission, acknowledgement and fill. Avoid drawing conclusions from a single delayed trade.

Make execution part of your trading plan

Trading latency is easy to overlook when a platform appears to respond instantly. But an order passes through several systems before it is confirmed, and delays can affect the price or timing of a trade. A stable connection, suitable technology and a clear understanding of the broker's execution model can help reduce avoidable problems.

FP Markets reports average execution under 8 milliseconds from the Equinix NY4/LD4 data centre, backed by a no dealing desk model with no requotes. Explore FP Markets' account options and review the trading conditions to see whether they suit your needs.