Base / Quote currency

### The price is a sentence, and the order is the grammar EURUSD 1.0850 means one euro costs 1.0850 US dollars. Base first, quote second, and the price always answers the same question: *how much quote currency buys one unit of the base?* Go long the pair and you are buying the base and selling the quote. Go short and you do the reverse. The order is not arbitrary. The market runs a settled pecking order, and whichever currency ranks higher becomes the base. The euro leads everything, then sterling, then the Australian and New Zealand dollars, then the US dollar, then the Canadian dollar, the Swiss franc and the yen. That is why you see EURGBP and never GBPEUR, GBPUSD and never USDGBP, USDJPY and never JPYUSD. ### The flip that scrambles people Notice where the dollar sits. It is the **quote** in EURUSD, GBPUSD, AUDUSD and NZDUSD. It is the **base** in USDJPY, USDCHF and USDCAD. Same dollar, opposite side. So one single event, the dollar strengthening, pushes AUDUSD and EURUSD **down** while pushing USDJPY **up**. Nothing contradictory is happening. The dollar is just on a different side of the fraction. This is exactly why a dollar-strength read like DXY inverts against AUDUSD but moves with USDJPY, and getting this backwards is how people end up short the very thing they are bullish on. The classic version of the mistake: *"I think the yen is going to strengthen, so I will buy USDJPY."* Buying USDJPY is buying dollars and selling yen. A bullish-yen view is a **sell** USDJPY. ### Pip value lives in the quote currency This is the part that quietly breaks people's risk maths. A pip is always denominated in the quote currency. - On a USD-quoted pair like EURUSD or AUDUSD, one standard lot is 100,000 units, so one pip is 100,000 x 0.0001 = 10 USD. If your account is in dollars, that is a flat $10 per pip, always. - On USDJPY, the quote currency is the yen and a pip is 0.01, so one pip is 100,000 x 0.01 = 1,000 JPY. Your account is not in yen, so that has to be converted back at the live rate. If USDJPY were trading at 150, that pip is worth roughly $6.67. At a different rate it is worth something different. That is the whole point: on some pairs your pip value is fixed, and on others it floats with the exchange rate. Size a JPY or CHF-quoted position as though it were EURUSD and your real risk is not the number you typed into the box. ### Why it is worth reading properly The [BIS Triennial Survey](https://www.bis.org/statistics/rpfx25_fx.htm) found the US dollar was on one side of 89.2% of all FX trades in April 2025, out of $9.6 trillion of daily turnover, and that the ten most traded pairs all involve the dollar. Practically every chart you will ever look at has a dollar leg. Knowing *which* leg it is on is not trivia. It is the difference between reading a price and guessing at one.