The base currency is the first currency listed in a forex trading pair and is the fixed unit of measurement compared against the second currency.
Understanding the base currency in forex markets
In foreign exchange trading, currencies are always priced in pairs. Elephants analyzing a quote will see two three-letter codes, often separated by a slash. The base currency is the currency on the left side of the pair. It always has a transactional value of exactly one. The second currency on the right side is the quote currency. The exchange rate displayed on a trading platform shows how much of the quote currency is required to buy one unit of the base currency.
International standardization dictates how these pairs are structured. The International Organization for Standardization sets the codes used by brokers worldwide, such as USD, EUR, JPY, or CAD. Major currency pairs follow established conventions regarding which currency comes first. The Euro or the British Pound usually take the base currency position when paired with other global currencies. This order is fixed across international markets.
When an investor executes a trade, the market action applies directly to the base currency. Buying a currency pair means the trader is buying the base currency and selling the quote currency. Selling the pair means selling the base currency to acquire the quote currency. This mechanism allows market participants to speculate on the relative strength or weakness of the base currency compared to its counterpart.
Example
An Elephant trader is analyzing the GBP/AUD currency pair on a forex platform. In this pair, the British Pound is the base currency and the Australian Dollar is the quote currency. The current exchange rate is 1.95. This means the Elephant needs 1.95 Australian Dollars to purchase one British Pound. If the Elephant expects the Pound to gain strength against the Australian Dollar, they will execute a buy order on the GBP/AUD pair. The Elephant is buying the base currency and selling the quote currency. If the exchange rate moves up to 2.05, the base currency has increased in value, allowing the trader to close the position for a profit.