How Currency Pairs Work

In forex, you never trade a currency by itself. You always trade one currency against another — that's what makes it a "pair." When you buy EUR/USD, you're buying euros and selling US dollars simultaneously. When you sell GBP/JPY, you're selling British pounds and buying Japanese yen.

This might feel unintuitive at first, but it's actually straightforward once it clicks. Every trade is a bet that one currency will gain value relative to the other.

Base Currency and Quote Currency

Every currency pair has two parts:

• Base currency — the first currency listed (left side)
• Quote currency — the second currency listed (right side)

Take EUR/USD = 1.0850. The base currency is EUR, the quote currency is USD. This price tells you: one euro costs 1.0850 US dollars.

If you buy EUR/USD, you think the euro will strengthen (the price will go up). If you sell EUR/USD, you think the euro will weaken (the price will go down).

Here's a practical example. You buy EUR/USD at 1.0850 and later the price moves to 1.0900. The euro got stronger relative to the dollar. You made money. If it dropped to 1.0800 instead, you lost money.

Major Pairs

Major pairs all include the US dollar as either the base or quote currency. They're the most traded, most liquid, and typically have the tightest spreads. These are your bread and butter:

• EUR/USD (Euro/US Dollar) — the most traded pair in the world, roughly 24% of total forex volume. Tight spreads, massive liquidity. Influenced by ECB and Fed policy.
• USD/JPY (US Dollar/Japanese Yen) — second most traded. Sensitive to interest rate differentials between the US and Japan. The yen is also considered a safe-haven currency.
• GBP/USD (British Pound/US Dollar) — nicknamed "Cable" from the undersea telegraph cable that once connected London and New York exchanges. Volatile and reactive to UK political events.
• USD/CHF (US Dollar/Swiss Franc) — the Swiss franc is another safe-haven currency. During global uncertainty, money tends to flow into CHF.
• AUD/USD (Australian Dollar/US Dollar) — heavily tied to commodity prices, especially iron ore and gold, since Australia is a major exporter.
• USD/CAD (US Dollar/Canadian Dollar) — closely linked to oil prices since Canada is a top oil exporter. When oil rises, CAD often strengthens.
• NZD/USD (New Zealand Dollar/US Dollar) — similar to AUD/USD but with lower liquidity. Influenced by dairy prices and trade relations with China.

If you're just starting out, stick to the majors. They're cheaper to trade, less volatile, and have more educational content written about them.

Minor Pairs (Crosses)

Minor pairs involve two major currencies, but not the US dollar. Common crosses include:

• EUR/GBP — euro against the pound, influenced heavily by EU-UK economic relations
• EUR/JPY — popular with swing traders due to decent volatility and clear trends
• GBP/JPY — nicknamed "The Dragon" or "The Beast" for its wild price swings. Not recommended for beginners
• AUD/NZD — two closely correlated economies, so this pair often trades in ranges
• EUR/CHF — usually low volatility, except when the Swiss National Bank makes surprise announcements

Minor pairs have slightly wider spreads than majors, but they're still very tradeable. Some traders prefer them because they can express a view on two non-USD economies without the noise of dollar-driven moves.

Exotic Pairs

Exotic pairs combine a major currency with a currency from a developing or smaller economy:

• USD/TRY (US Dollar/Turkish Lira)
• EUR/ZAR (Euro/South African Rand)
• GBP/MXN (British Pound/Mexican Peso)
• USD/SGD (US Dollar/Singapore Dollar)
• USD/THB (US Dollar/Thai Baht)

Exotics come with wider spreads — sometimes 5-20 pips or more. They're less liquid, more volatile, and can make dramatic moves on local political or economic news. Trading them is expensive and unpredictable. Most beginners should avoid exotics entirely until they have solid experience.

How to Read a Forex Quote

When you look at a forex quote, you'll actually see two prices: the bid and the ask.

• Bid = the price at which you can sell (the broker buys from you)
• Ask = the price at which you can buy (the broker sells to you)

For example: EUR/USD Bid: 1.0848 | Ask: 1.0850

If you want to buy, you pay the ask price (1.0850). If you want to sell, you get the bid price (1.0848). The difference — 0.0002, or 2 pips — is the spread. That's the broker's compensation for facilitating the trade.

The ask is always higher than the bid. When you enter a trade, you immediately start with a small loss equal to the spread. Your trade needs to move at least the spread amount in your favor before you break even.

What Moves Currency Pairs

Currency prices are driven by supply and demand. Several factors influence which direction a pair moves:

Interest rates are the single biggest driver. When a country's central bank raises interest rates, its currency tends to strengthen because higher rates attract foreign investment seeking better returns. The relationship between US and Japanese rates largely determines where USD/JPY trades.

Economic data releases — jobs reports, GDP numbers, inflation data, retail sales — all impact currency values. Strong economic data typically strengthens a currency. Traders watch economic calendars religiously for scheduled announcements.

Geopolitics and risk sentiment play a major role. Wars, elections, trade disputes, and political instability all affect currencies. During global crises, money flows into safe havens (USD, JPY, CHF) and out of riskier currencies.

Trade balances matter too. Countries that export more than they import tend to have stronger currencies because foreign buyers need to purchase the domestic currency to pay for goods.

Market sentiment and speculation can move prices in the short term regardless of fundamentals. If enough traders believe EUR/USD is going to rise, their buying pressure can push it higher — at least temporarily.

In the next lesson, we'll get into the specifics of how profits and losses are calculated using pips and lots — the measurement system of forex trading.