Bid, Ask and the Spread in Forex Trading
When you first look at a forex or gold quote, you may notice something odd: there are two numbers, not one. A currency pair like EUR/USD is always shown with a bid price and an ask price, and they are never quite the same. That small difference, called the spread, is one of the most important mechanics to understand before placing any trade, because it affects every position you open regardless of what the market does afterwards.
The bid is the price at which the market is willing to buy the base currency from you. In other words, it is the price you receive when you sell. The ask, sometimes called the offer, is the price at which the market is willing to sell to you, so it is the price you pay when you buy. The ask is always the higher of the two. A simple way to remember it: you buy at the higher price and sell at the lower one, and the market makes its money on the difference.
To use a purely illustrative example, imagine EUR/USD is quoted at 1.1000 bid and 1.1002 ask. If you buy, your position opens at 1.1002. If you immediately changed your mind and closed it, you would sell at the bid of 1.1000, losing two pips. This is why a freshly opened trade usually shows a small loss on the screen the moment it appears. Nothing has gone wrong — the position simply has to travel the width of the spread before it reaches break-even.
The spread is normally measured in pips, the standard unit of price movement for a currency pair. For most pairs quoted to four or five decimal places, a pip is the fourth decimal, so a move from 1.1000 to 1.1002 is two pips. For pairs involving the Japanese yen, which are quoted to two or three decimals, a pip is the second decimal. Gold, usually quoted as XAU/USD, is conventionally measured in dollars and cents per ounce, and its spread is typically expressed in cents or dollars rather than pips.
Why does a spread exist at all? Forex has no single central exchange. Prices come from a network of banks, liquidity providers and other participants, each quoting prices at which they are prepared to deal. A market maker takes on risk by standing ready to buy and sell at any moment, and the spread is the compensation for providing that service and carrying that risk. Brokers may also add a small markup to the raw interbank spread, or charge a separate commission and pass through a tighter spread. Both models exist; neither is inherently better, and the real comparison is the total transaction cost rather than the headline spread alone.
Spreads are not fixed. They tend to be narrowest in the most heavily traded pairs — the so-called majors involving the US dollar — because high volumes mean many participants competing to quote. Less liquid pairs, often called exotics, generally carry much wider spreads. Time of day matters too: spreads are usually tightest when major financial centres overlap and liquidity is deep, and they widen during quiet hours, around weekends and public holidays, and in the seconds surrounding major economic releases, when quoting firms pull back to protect themselves from sudden price jumps. Gold behaves similarly, with spreads commonly widening during thin trading periods.
The practical consequence is that the spread is a real cost that compounds with activity. A trader who opens one position a month barely notices a two-pip spread. A trader who opens twenty positions a day pays it forty times, since the cost applies on both entry and exit. Strategies that aim for very small price moves are therefore far more sensitive to spread than longer-horizon approaches, and a spread that widens unexpectedly can erase the intended profit on a short-term trade entirely.
Spreads also interact with orders. A stop-loss on a long position is typically triggered by the bid, while a stop on a short position is triggered by the ask, so a widening spread can touch a stop level even if the mid-price has not moved as far as you expected. Knowing which side of the quote applies to your order, and checking the spread conditions of the instrument and the session you are trading in, helps you set levels that reflect how prices are actually filled rather than how a single mid-price chart appears.
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This article is for general education only — not financial advice, and nothing here is a recommendation to buy or sell any currency or metal. Trading forex and gold carries a high risk of loss; leverage magnifies losses as well as gains, and many retail traders lose money. Always do your own research before making a financial decision.
