What Is Spread in Forex?
Every time you place a trade in the forex market, you encounter two prices side by side: the bid and the ask. The bid is the price at which you can sell a currency pair, and the ask is the price at which you can buy it. The difference between these two prices is called the spread.
The spread is not a fee you see on an invoice — it’s built directly into the price. If EUR/USD is quoted as 1.10500 / 1.10512, the spread is 1.2 pips. That gap is how most brokers, particularly market makers, earn their revenue without charging a separate commission. If you’re new to terms like bid, ask, and pips, the Essential Forex Terms Every New Trader Must Know guide is a great place to build your foundation first.
Understanding the spread is not optional — it is one of the most fundamental trading costs you will face, and it directly shapes whether a given strategy is viable or not.
How Is Spread Measured and Calculated?
Spread is almost always measured in pips (percentage in point), which is the smallest standard price increment for most currency pairs. For major pairs like EUR/USD or GBP/USD, one pip equals 0.0001. Some brokers quote in fractional pips (pipettes), allowing spreads to be quoted to five decimal places for even greater precision.
To calculate the cost of a spread in monetary terms, use this simple formula:
- Spread cost = Spread in pips × Pip value × Lot size
For example: if you trade 1 standard lot (100,000 units) of EUR/USD with a spread of 1.2 pips, and the pip value is approximately $10, your entry cost is $12. That means the trade must move at least 1.2 pips in your favour before you break even — before profit even begins.
This is why spread matters more for short-term traders than for those holding positions over days or weeks. A scalper entering and exiting dozens of trades a day faces a compounding cost that can dramatically erode profitability. For a swing trader targeting 80–100 pip moves, a 1.5-pip spread is far less significant relative to the target.
Fixed vs. Variable Spreads
Brokers typically offer one of two spread structures:
Fixed Spreads
Fixed spreads remain constant regardless of market conditions. They tend to be slightly wider than the tightest variable spreads available, but they offer predictability. Traders who prefer knowing their exact cost per trade in advance — particularly those using automated systems — often favour fixed spreads. The trade-off is that you may be paying more than necessary during calm, liquid market hours.
Variable (Floating) Spreads
Variable spreads change in real time based on market liquidity and volatility. During active trading sessions — such as the London/New York overlap — spreads on major pairs can tighten significantly. However, during low-liquidity periods or around high-impact news events, spreads can widen dramatically and quickly. A spread that sits at 1.0 pip normally might jump to 5 or even 10 pips during a major news release. This is something traders must account for in their risk management. You can learn more about when markets are most liquid in our guide to Forex Trading Hours: When Is the Market Most Active?
The type of broker you use also plays a role here. ECN brokers typically pass raw interbank spreads to clients (often very tight, sometimes near zero) and charge a separate commission instead. Market makers, on the other hand, often include all their revenue in a wider spread. Understanding this distinction is covered well in the article on ECN vs Market Maker Brokers.
How Spread Affects Your Trading Strategy
Spread affects your bottom line in ways that go beyond a simple entry cost. Here’s how it plays out across different trading styles:
Scalping and Day Trading
For scalpers targeting small pip movements — sometimes just 3 to 10 pips — even a 1.5-pip spread represents 15–50% of the target profit. This makes broker selection and pair selection absolutely critical. Scalpers should focus on high-liquidity pairs (EUR/USD, USD/JPY) during peak sessions to ensure spreads remain as tight as possible.
Swing and Position Trading
Swing traders targeting larger moves feel the spread’s impact much less acutely. With a target of 100 pips and a stop loss of 50 pips, a 1.5-pip spread is relatively minor. However, spread still contributes to the true risk/reward calculation and should not be ignored.
Automated Trading (Expert Advisors)
EAs and algorithmic strategies are particularly sensitive to spread. A strategy that looks excellent in backtesting at zero spread may perform poorly in live trading if average spreads aren’t factored in. Always backtest your Expert Advisor with realistic spread values to get an honest picture of real-world performance. Similarly, if your EA trades around news events, be aware that slippage and spread spikes often go hand in hand — our article on What Is Slippage in Forex covers this interaction in more detail.
Pair Selection Matters
Not all currency pairs carry the same spread. Major pairs like EUR/USD and USD/JPY tend to have the tightest spreads due to their enormous trading volume and liquidity. Exotic pairs — such as USD/TRY or EUR/ZAR — can carry spreads of 20, 50, or even 100+ pips, making them significantly more expensive to trade. Always check your broker’s spread schedule before committing to a strategy on a particular pair.
Practical Tips to Minimise Spread Costs
- Trade during peak liquidity hours — The London and New York sessions, especially when they overlap, typically offer the tightest spreads on major pairs.
- Avoid trading major news events — Unless your strategy specifically accounts for it, spreads can spike violently around NFP, central bank decisions, and CPI releases.
- Choose the right broker — Compare spread structures across brokers, and consider whether an ECN model with raw spreads plus commission suits your trading style better than a market-maker model.
- Focus on high-liquidity pairs — If minimising cost is a priority, stick to majors where competition among liquidity providers keeps spreads narrow.
- Factor spread into your backtests and strategy planning — A target of 10 pips with a 2-pip spread and a 1-pip commission is very different from the same target with zero cost assumed.
Closing Thoughts
Spread is one of the most overlooked yet most consistent costs in forex trading. It doesn’t shout — it quietly deducts from every trade you take, compounding over time. Traders who take the time to understand how spreads work, how to compare broker offerings, and how to align their strategy with realistic cost assumptions will always have an edge over those who don’t.
If you’re building or refining a trading strategy and want tools to help manage execution quality and cost efficiency, the MetaTrader indicators and Expert Advisors available at mghfx.com are designed with real trading conditions — including spread impact — in mind.
Disclaimer: This article is for educational purposes only and does not constitute financial or investment advice. Trading forex involves significant risk of loss. Always do your own research and consider your risk tolerance before trading.
Photo by Nick Chong on Unsplash
