In plain English
What Base currency means
In EUR/USD, the euro is the base currency and the U.S. dollar is the quote currency. If the pair rises, one euro is worth more dollars; if it falls, one euro is worth fewer dollars. The base currency anchors how the pair is read.
Why it matters
Knowing the base currency tells you what you are actually trading. It helps you interpret whether you are buying or selling the first currency in the pair and how profit or loss is measured when the quote changes.
Example
If GBP/JPY is quoted at 198.40, one British pound is worth 198.40 Japanese yen. Buying the pair means buying pounds and selling yen at that price. A rise to 198.90 means the pound strengthened versus the yen.
Quick answers
Common questions
Is the base currency always the stronger currency?+
No. It is simply the first currency named in the pair, not a ranking of strength.
Does the base currency change across brokers?+
The convention is standard for a given pair, though some platforms may invert or display cross rates differently.
Sources