What Is Spread in Forex Trading?

Whenever a forex quote is displayed, it is accompanied by two prices: the bid and the ask. These two figures form the foundation of spread calculation and represent the prices at which market participants can sell or buy a currency pair.

Spread is the difference between the sell price (bid) and the buy price (ask). In other words, it is the gap between the sell quote and the buy quote displayed on a trading platform. From the broker’s perspective, the spread represents a primary source of revenue. Each time a trader opens a position, they effectively pay the spread, which can range from just a few points to several tens of points depending on the currency pair traded.

Spread sizes vary across currency pairs, and even for the same pair, different brokers may offer different spreads. Some brokers provide fixed spreads, where the bid–ask difference remains constant regardless of market conditions. Others apply floating (or variable) spreads, where the spread dynamically changes according to liquidity and volatility in the market.

On platforms such as MetaTrader, traders can observe real-time spreads directly in the quote window, allowing continuous monitoring of transaction costs before entering a trade.

How to Calculate Spread

Spread is measured in pips, the smallest standardized unit of price movement in forex. For most currency pairs, one pip equals 0.0001. When trading forex or other instruments through CFD accounts or spread betting platforms, traders typically pay the full spread upon entering a position. A narrower spread translates into lower transaction costs, although some brokers compensate with additional commission charges.

The calculation method is straightforward:

Bid price of GBP/USD: 1.26739

Ask price of GBP/USD: 1.26749

Spread = 1.26749 − 1.26739 = 0.00010

This means the spread equals 1.0 pip.

What Determines Forex Trading Spread?

Each currency pair carries its own typical spread range, with some pairs consistently offering tighter spreads than others. Several key factors that influence the spread are as follows:

• Differences in currency rates: Exchange rate differentials between currencies in a pair affect pricing and liquidity, which in turn influence the spread. A rise or fall in a currency’s value can alter the bid–ask gap.
• Volatility: Highly volatile currency pairs generally carry wider spreads, reflecting increased risk for liquidity providers.
• Economic news and events: Major economic releases, central bank announcements, or geopolitical developments often trigger volatility spikes, leading to temporary spread widening.
• Trading hours: During overlapping major market sessions—such as London, New York, and Tokyo—liquidity is typically higher, resulting in tighter spreads. Outside these peak hours, liquidity thins and spreads tend to widen.
• Broker mechanism: Each broker applies its own pricing model, liquidity sourcing, and execution method, all of which affect the spread offered to traders. One broker could provide fixed spreads while another uses floating spreads.

The Impact of Spread on Profitability

Spread size has a direct impact on trading profitability. A narrow spread reduces transaction costs and is generally associated with high liquidity and stable market conditions. Conversely, a wider spread increases trading costs and can erode profit margins.

Example:

A trade earns 10 pips in price movement.

With a 5-pip spread, net profit = 5 pips.

With a 1-pip spread, net profit = 9 pips.

The influence of spread also varies by trading strategy. Scalpers, who execute many short-term trades aiming for small gains, are particularly sensitive to spread costs. Trend-following traders, who hold positions longer for larger price moves, are comparatively less affected.

Illustration:

A scalper executes 100 trades with a 2-pip spread → total spread cost = 200 pips.
If gross profit = 500 pips → net profit = 300 pips.

A trend follower executes 10 trades with a 2-pip spread → total spread cost = 20 pips.
If gross profit = 100 pips → net profit = 80 pips.

Some risk-averse traders may prioritize broker reliability, execution quality, or additional features over the tightest possible spreads, even if that means paying higher transaction costs. To achieve more stable trading performance, many traders focus on major currency pairs, which typically offer the lowest spreads due to deep liquidity.

In contrast, exotic and cross-currency pairs often display wider spreads because of lower liquidity, making consistent profitability more challenging.

Types of Spread

In general, forex spreads fall into two main categories: floating (variable) spread and fixed spread. Each type carries distinct characteristics, advantages, and limitations.

Floating Spread

A floating spread—also known as a variable spread—changes dynamically according to market conditions. During periods of heightened volatility, floating spreads tend to widen. When markets are calm and liquidity is strong, they typically narrow.

Fixed Spread

A fixed spread is a bid-ask difference predetermined by the broker and generally remains constant. However, most brokers include disclaimers noting that spreads may temporarily increase during periods of extreme fundamental-driven market volatility.

To understand more clearly, let’s look at the comparison below:

Which Type of Spread is Better?

There is no universal answer as to whether fixed or floating spreads are superior. The optimal choice depends on individual trading style, risk tolerance, and strategic preference.

New traders often gravitate toward fixed spreads because transaction costs are easier to anticipate. Scalpers may also prefer fixed spreads due to cost predictability across frequent trades. On the other hand, traders comfortable with real-time market monitoring may favor floating spreads, as they reflect actual liquidity conditions and can present opportunities during periods of heightened volatility.

Ultimately, understanding how spreads function—and how they influence total trading costs—is essential for developing consistent and sustainable forex trading performance.