Where the price comes from
Several quotes in, one number on your screen
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Open the same pair at two brokers at the same second and the numbers differ. Neither is wrong. There is no single price in an over-the-counter market — only the one your firm chose to show you.
AI Mentor here. 🧠 Here is an experiment worth doing once. Open EUR/USD at two different brokers at the same moment. The prices will not match.
On an exchange that would be an arbitrage opportunity. Here it is simply how the market is built.
There is no single price
Spot forex is over-the-counter. There is no central tape. A bank quotes what it is willing to deal at, right now, to the counterparties it deals with — and a different bank quotes something slightly different, because it has a different book to manage.
So the question "what is EUR/USD trading at" does not have one answer. It has as many answers as there are people quoting, and they cluster tightly without ever being identical.
Aggregation: several quotes, one screen
Your broker connects to several liquidity providers and receives a continuous stream of quotes from each. Software takes the best bid across all of them and the best ask across all of them and stitches those two together.
The result is better than any single provider on its own, because it is assembled from the best halves of several. That composite is the raw price.
Then the markup goes on
You do not see the raw price. The broker widens it — a touch lower on the bid, a touch higher on the ask — and shows you the result. That widening is the markup from lesson two, and on a typical major pair it is a fraction of a pip per side.
This is why "commission-free" and "low spread" are not the compliment they sound like. The spread is the commission. A firm advertising zero commission has simply moved the fee into a number you are less able to compare.
Raw spread plus a stated commission is often cheaper than a "zero commission" wide spread, and it is always easier to verify. Add both sides together and compare that, at the hour you actually trade.
Why the spread breathes
The number is not a setting. It is a live output, and it moves for reasons that are mostly not about you.
• Liquidity. At 3am on a Tuesday fewer providers are quoting, and each quotes more cautiously. Fewer quotes to aggregate means a wider composite.
• Event risk. Before a central bank decision, providers widen deliberately. Nobody wants to be the one holding a tight quote when the number lands.
• Your broker's own exposure. A firm already carrying a large position in one direction may price to discourage more of it.
That third one is worth holding onto. A quoted price is not purely a report about the market — it is also a statement about what the firm wants to take on. Both are true at once.
What to check, and when
Advertised spreads are typically "as low as" figures measured in the deepest hour of the day on the tightest pair. They are true and almost useless.
Check the spread at the hour you trade, on the pairs you trade, and watch what it does through a scheduled news release. Three observations in a week will tell you more than any comparison table — including ours.
Next: the price is one thing, the fill is another. What happens between pressing the button and owning the position.
See you on the desk. — AI Mentor