What Are Spreads and Commissions in Forex?
Every time you open a trade in the forex market, you pay a cost — even if it’s not labeled as a “fee.” That cost comes in two main forms: the spread and the commission. Understanding the difference, and how each broker structures these costs, is essential for evaluating whether a broker is actually affordable for your trading style.
The spread is the difference between the bid price (what buyers pay) and the ask price (what sellers receive). For example, if EUR/USD is quoted at 1.10502 / 1.10510, the spread is 0.8 pips. This gap is the broker’s built-in markup — you start every trade slightly in the negative, and you need price to move in your favor just to break even.
A commission, on the other hand, is an explicit, separately charged fee — typically a fixed dollar amount per lot traded (e.g., $3.50 per standard lot, per side). Some brokers charge commissions instead of widening the spread; others do both.
Fixed vs. Variable Spreads
Not all spreads behave the same way. Brokers generally offer one of two models:
Fixed Spreads
A fixed spread stays constant regardless of market conditions. If a broker quotes EUR/USD at a 1.5-pip fixed spread, that’s what you pay at 2 AM on a quiet Tuesday or during a major central bank announcement. This predictability is appealing to newer traders who want to know their costs upfront.
The trade-off: fixed spreads are usually wider than the tightest variable spreads available during calm market hours. Market maker brokers most commonly offer fixed spreads, since they are the counterparty to your trade and can set their own pricing.
Variable (Floating) Spreads
Variable spreads fluctuate with market liquidity. During peak trading hours — when London and New York sessions overlap — spreads on major pairs like EUR/USD can tighten to 0.1–0.3 pips with certain ECN brokers. But during off-hours, thin liquidity, or high-impact news releases, those same spreads can spike to 5, 10, or even 20+ pips in an instant.
This means a variable-spread trader might enjoy lower costs most of the time but faces unpredictable charges at critical moments. For traders using automated strategies or trading around news events, this distinction matters enormously. Understanding how ECN and market maker brokers differ is key to choosing the right spread model for your style.
How Broker Type Shapes Your Trading Costs
The broker’s business model directly determines how — and how much — you pay.
Market Maker Brokers
Market makers act as the counterparty to your trades, essentially taking the other side of your position. They make money primarily through the spread. Because their profit is tied to that markup, they tend to offer wider spreads but typically charge no separate commission. This “no commission” framing can make them seem cheaper at first glance, but the cost is simply embedded in the spread.
ECN / STP Brokers
ECN (Electronic Communication Network) and STP (Straight Through Processing) brokers route your orders to external liquidity providers — banks, hedge funds, and other institutions. They pass on the raw, interbank spread (which can be extremely tight, sometimes near zero) and charge an explicit per-lot commission in return. This model is generally more transparent and often more cost-effective for high-volume traders.
As a rough example: an ECN broker might offer EUR/USD with a 0.2-pip spread plus a $3.50/lot commission each way. A market maker might offer the same pair at a flat 1.8-pip spread with no commission. Depending on your trade size and frequency, one may be significantly cheaper than the other.
Hybrid Models
Many modern brokers blend both approaches — offering ECN-like pricing on some account types and fixed-spread market-maker accounts on others. Always read the account specification page carefully and test during different times of day on a demo account before committing real capital. It’s also worth verifying a broker’s regulatory standing, since broker regulation directly affects how fairly these costs are applied.
The Real Cost Impact on Your Trading
Traders often underestimate how dramatically costs compound over time. Consider a scalper who makes 20 trades per day on EUR/USD with a standard lot (100,000 units). At a 1-pip spread, that’s $10 per round trip. Over 20 trades, that’s $200 per day in spread costs alone — over $4,000 per month before a single winning or losing trade is counted.
Even for a swing trader opening a few positions a week, a 1-pip difference in spread across 50 trades per month on a standard lot equals $500 in extra costs annually. These figures aren’t hypothetical warnings — they’re real arithmetic that determines whether a profitable strategy stays profitable after costs.
Here are the key factors to compare when evaluating broker costs:
- Average spread during your usual trading hours — not just the advertised “minimum from” figure
- Commission per lot (round turn or per side) — and whether it scales with volume
- Swap/rollover rates — the overnight financing cost for positions held past the daily rollover (often overlooked but significant for position traders)
- Inactivity fees, withdrawal fees, and deposit fees — secondary costs that add up over time
- Spread behavior during news events — test this on a demo account before going live
For traders using Expert Advisors or automated systems, cost sensitivity is even higher — a strategy that back-tested profitably on 0.5-pip spreads may break even or lose money at 1.5 pips. Common EA mistakes often include failing to account for realistic spread and commission costs during backtesting.
Choosing a Broker Based on Your Trading Style
There’s no universally “cheapest” broker — the right choice depends on how you trade:
- Scalpers and high-frequency traders benefit most from ECN/STP brokers with the lowest possible raw spreads plus commission, since every pip saved is multiplied across dozens of daily trades.
- Day traders and swing traders can often do well with either model, but should still compare total costs (spread + commission) rather than looking at either figure in isolation.
- Position traders who hold trades for days or weeks should pay closer attention to swap rates, which can exceed spread costs over a long hold period.
- Algorithmic traders should back-test strategies using the broker’s actual historical tick data or at minimum their average spread — and run the EA on a demo account with realistic spread settings before going live.
MGH Products’ MetaTrader indicators and Expert Advisors at mghfx.com are built with cost-aware logic in mind, helping traders account for real-world spread and commission conditions when executing strategies.
Final Thoughts
Spreads and commissions are not just fine print — they are a recurring, unavoidable part of every trade you place. A broker that looks attractive based on marketing alone may quietly cost you far more than a less-promoted alternative. Take the time to calculate your total cost per trade for your typical lot size, measure spread behavior during your trading hours, and compare broker types before making a commitment. A well-informed cost analysis is one of the most practical steps you can take toward consistent profitability.
This article is for educational purposes only and does not constitute financial or investment advice. Always conduct your own due diligence before selecting a broker or placing trades.
Photo by Joshua Mayo on Unsplash
