Fixed or variable spread — which one to choose on Forex?

Spread is the difference between the buy price (ask) and the sell price (bid) of the same currency pair — the first cost you pay the moment you open a position, before the market has moved at all. Brokers offer it in two flavours: fixed, which stays the same regardless of the hour, and variable, which breathes with the market's liquidity. In this article I compare both models on concrete numbers from EUR/USD and exotic pairs, to help you pick the one that fits your trading style.

What spread actually is and why you always pay it

Every pair is shown at two prices. If EUR/USD is quoted as 1.0850 / 1.0851, the bid is the price at which the broker buys euros from you and the ask the price at which it sells them. The difference here is one pip — the spread. You open a long position at the ask and close it at the bid, so the second you enter your trade is already under water by the spread. The market must travel that distance in your favour before you even break even. Bid and ask also govern how protective orders fire: which of the two prices triggers your stop-loss versus your take-profit is explained in the article on bid and ask — how SL and TP orders are executed.

Counterintuitively, this is not a "broker fee" in the classical sense. The spread is baked into the mechanism of the market — it exists because someone on the other side must risk holding a position until they find a counterparty. The easier it is to find a buyer and a seller, the smaller that cost is. That is why the spread on EUR/USD can be a fraction of a pip while on an exotic it is dozens of times wider. The mechanism is identical; only the depth of the market differs.

Fixed spread — the Market Maker model

A fixed spread is a guaranteed value: the broker declares that on EUR/USD you always see, say, 1.5 pips, whether you trade at 14:00 or at midnight, and whether or not US inflation data is being released. This model is offered mainly by Market Makers — brokers who act as the counterparty to your trades and manage the risk internally instead of routing every order to the interbank market.

For a beginner this brings a real advantage: predictability. You know in advance what entry costs, so planning is easier. The price of that calm is hidden in the average, though. Since the broker guarantees the rate even in the most nervous moments, it keeps a buffer — so in quiet hours you pay more than a variable spread would. The second point, rarely mentioned: during sharp moves a Market Maker usually does not widen the spread but requotes more often, or you run into price slippage, where your order fills at a worse price than the one on screen.

Variable spread — the ECN and interbank model

A variable (floating) spread reflects the live interbank market. At an ECN broker it can drop to 0.1–0.2 pip at 14:00, when the London and New York sessions overlap, then widen to several pips that same night once the major sessions close. An ECN broker is not your counterparty — it routes the order to a pool of liquidity providers (banks and institutions) and earns on a commission charged on volume, not on the spread.

How wide a variable spread runs depends directly on the market liquidity at that instant. On EUR/USD it can be almost zero at peak activity, but it widens dramatically in two situations: at night, when the major centres are asleep, and in the seconds around important macroeconomic releases. On a US labour-market print the spread can jump from 0.3 to a dozen-plus pips for a few seconds — I cover that effect in the article on spread widening on news. For a scalper trading in exactly those moments, that is the difference between a profitable strategy and a losing one.

"The spread is the first thing a serious trader looks at when judging a broker — because it is the only cost you pay on every single trade, win or lose." — Kathy Lien, Day Trading and Swing Trading the Currency Market, John Wiley & Sons, 2005.

The numbers: EUR/USD versus exotics

Concrete numbers. On the most liquid pair in the world — EUR/USD — a variable spread at a good ECN broker runs between 0.1 and 1 pip, while a fixed spread at a Market Maker is typically 1 to 2 pips. The less frequently a pair is traded, the higher the cost: on exotics such as USD/TRY (Turkish lira) or USD/ZAR (rand) the spread can reach 10 to 50 pips and more, because liquidity is thin and the risk of holding the other side is far greater.

This table captures the heart of the choice. A fixed spread flattens cost into one predictable number. A variable spread gives the lowest cost in good hours but punishes trading at night and during data releases. For someone who enters once a week, those swings are irrelevant. For someone who clicks a hundred times a day, they decide the outcome.

Spread is not the whole cost — add commission and swap

The most common mistake when comparing brokers is looking at the spread alone. It is only one part of the total cost of a trade. An ECN model with a very tight spread almost always adds a commission on volume — typically around 6 to 7 USD per standard lot traded (counted on both sides, the open and the close). A Market Maker model usually charges no commission but compensates with a wider spread. That is why "spreads from 0.0 pips" in an advert means nothing without the commission attached.

The real cost is simple: (spread × pip value) + commission + any overnight swap. Only that sum tells you which broker is cheaper for your style. An ECN account with a 0.2-pip spread and a 7 USD commission can beat a Market Maker account with a 1.8-pip spread — but only at sufficient volume. I break this down step by step in the article on the real cost of trading: spread versus commission, because that is exactly where most beginners overpay. For a concise definition of the term, see the spread entry in the ForexMechanics glossary.

Which model suits whom

The choice is not mathematical — it depends on how often and when you trade. The more trades you take and the more sensitive your style is to single pips, the more the balance tips towards a variable ECN spread. The less often you enter and the longer you hold, the more you can ignore the difference and pick the predictability of a fixed spread.

• A fixed spread works when you are starting out or trade rarely. Predictable cost makes learning and planning easier, and if you open a few positions a week, paying slightly more on average is irrelevant against the convenience. It suits swing trading and multi-day positions.
• A variable spread works when you trade often and in liquid hours. A scalper or day trader taking dozens of trades a day loses profit to every extra pip, so a tight ECN spread in good hours is crucial — provided they avoid the night and the seconds around data releases.
• Whatever the model, regulation comes first. A tight spread at an offshore broker without oversight from a body such as the FCA, CySEC or ASIC is not a saving but a deposit-loss risk. A cheap broker that vanishes with your money is the most expensive of all.

Keep the wider risk context in mind too. According to ESMA data, between 74 and 89 percent of retail accounts lose money trading CFDs — and the spread is one of the quiet reasons an edge melts away so fast. Every trade starts under water by its size, so the higher the spread and the more trades you take, the higher the bar you must clear just to get back to zero.

What to do tomorrow

1. Measure your real spread during the hours you actually trade. Open a demo at two brokers and record the EUR/USD spread at the time you usually click — if it is the evening, check 21:00, not 14:00. The advertised "from 0.0 pips" is momentary; what matters is the average across your own trading window.
2. Calculate the total cost of one trade, not the spread alone. Take (spread × pip value) + commission + swap and plug in real numbers from two accounts — one ECN account with commission and one Market Maker account without. Only that sum tells you which is cheaper for your volume.
3. Verify the broker's licence before comparing anything else. Go to the FCA, CySEC or ASIC website and confirm the licence number of the broker you are considering. If it is not there, stop comparing spreads — no cost matters when the whole deposit is at risk.
4. Match the spread model to your trade count. Count how many positions you open per week. If they are occasional entries, choose a fixed spread for predictability. If it is dozens a day, choose an ECN account with a variable spread and learn to avoid the night and macro data releases.