Every forex screen shows a pair like EUR/USD 1.1123, and every beginner eventually asks the same thing: 1.1123 of what, per what? Reading a quote correctly is the first piece of vocabulary in the market, and mistakes here lead directly to mistakes in position sizing, stop placement and profit calculation. This guide walks through base and quote currencies, the bid and ask, cross rates, and how a quote translates into money in your account. All numbers are illustrative.
Base currency and quote currency
A pair is written BASE/QUOTE. The price tells you how many units of the quote currency one unit of the base currency costs. If EUR/USD is 1.1123, one euro costs 1.1123 US dollars. If you buy EUR/USD you are buying euros and, in the same transaction, selling dollars. If you sell EUR/USD you do the reverse.
That framing matters because every trade is two trades at once. A rise in the pair means the base currency strengthened against the quote currency, or the quote weakened, or both. The chart alone cannot tell you which side did the work. For that you need to look at the other pairs involving each currency, which is the basic idea behind currency correlation.
Why the pair order is fixed
Market convention decides which currency is the base. You will see EUR/USD, never USD/EUR, and GBP/USD, never USD/GBP. By long-standing convention the order of priority runs roughly EUR, GBP, AUD, NZD, USD, CAD, CHF, JPY. The currency earlier in the list is the base. That is why you see USD/JPY and USD/CAD but EUR/USD and AUD/USD. Pairs that include the US dollar are the majors; pairs without it are crosses.
Bid, ask and the spread
Every quote actually has two prices. The bid is the price at which the market will buy the base currency from you, so it is what you receive when you sell. The ask (or offer) is the price at which the market will sell the base currency to you, so it is what you pay when you buy. The ask is always higher than the bid, and the gap is the spread.
| Item | Illustrative value |
|---|---|
| EUR/USD bid | 1.11230 |
| EUR/USD ask | 1.11241 |
| Spread | 0.00011 (1.1 pips) |
The moment you buy at the ask you are already behind by the spread, because you could only sell back at the bid. Spreads widen around news and in thin hours, which is one reason the true cost of trading is larger than the headline number. Charts on many platforms draw the bid line only, so a buy order's stop and take-profit levels trigger against different prices than the chart suggests. Know which side your platform uses for each.
Decimals, pips and pipettes
Most pairs are quoted to five decimal places, with the fourth decimal being the pip. Yen pairs are quoted to three decimals with the second being the pip, so USD/JPY at 157.905 moves one pip when it goes from 157.90 to 157.91. The fifth (or third) decimal is a fractional pip sometimes called a pipette. The money value of a pip depends on the pair and position size, covered in pip value explained.
Turning a quote into profit and loss
Profit and loss are always first calculated in the quote currency. Suppose you buy 10,000 units of EUR/USD at 1.1100 and close at 1.1150. The move is 0.0050, so profit is 10,000 x 0.0050 = 50 US dollars. If your account is in dollars, that is the end of it. If your account is in Canadian dollars, the platform converts the 50 USD into CAD at the prevailing USD/CAD rate. A trader with a CAD account who trades EUR/USD therefore carries a small conversion step on every result, and the pip value drifts as USD/CAD moves.
The same logic explains why the pip value for USD/JPY is expressed in yen first. One pip on 10,000 units is 0.01 x 10,000 = 100 yen, which must be converted back to your account currency at the current rate.
Cross rates
A cross is a pair without the account's reference currency, such as EUR/GBP or AUD/NZD. Its price is implied by the two dollar pairs. If EUR/USD is 1.1123 and GBP/USD is 1.3277, then EUR/GBP is approximately 1.1123 / 1.3277, or 0.8378. Dealers keep crosses in line with the dollar pairs by arbitrage, so large, lasting gaps do not persist. Trading a cross is a way to express a view on two non-dollar currencies without taking a dollar position, though the trade still moves when either leg moves.
Inverse quotes and mental flips
If you want to see a pair from the other side, divide one by the price. A USD/CAD price of 1.4053 means a Canadian dollar is worth about 0.7116 US dollars. Many mistakes come from forgetting the flip: a rising USD/CAD is a falling Canadian dollar. When you write your trading notes, state the currency view in words ("long USD, short CAD") as well as the pair, so the direction is never ambiguous when you review the trade later in your journal.
A short checklist
- Identify the base and quote before you place any order.
- Remember buy fills at the ask, sell fills at the bid.
- Check how many decimals your platform quotes and which one is the pip.
- Work out the account-currency value of one pip before choosing size.
- Describe each trade as long one currency and short another.
None of this predicts anything, and that is the point: quote mechanics are plumbing. Getting the plumbing exactly right is what keeps your position sizing and risk numbers honest. This article is education only and uses illustrative figures.