The foreign exchange market — commonly called forex or FX — is the largest and most liquid financial market in the world. With over $7 trillion traded every single day, it dwarfs global stock exchanges combined. Unlike traditional markets, forex has no central exchange. Instead, it operates as a decentralized over-the-counter (“OTC”) network of banks, institutions, corporations, and individual traders.

At its core, forex is about exchanging one currency for another. If you have ever traveled abroad and swapped dollars for euros, you have already participated in the forex market. Traders attempt to profit by buying a currency they believe will appreciate and selling one they expect to depreciate.

Currency pairs are quoted in twos. The first currency is the base; the second is the quote. When you see EUR/USD at 1.0845, it means one euro buys 1.0845 US dollars. The major pairs all include the US dollar paired with the euro, British pound, Japanese yen, Swiss franc, Canadian dollar, Australian dollar, or New Zealand dollar.

These pairs dominate daily volume because they represent the world's largest economies. They tend to have the tightest spreads and deepest liquidity, making them ideal for beginners. Exotic pairs — such as USD/TRY or USD/ZAR — involve emerging-market currencies and usually carry wider spreads and higher volatility.

Majors: EUR/USD, GBP/USD, USD/JPY, USD/CHF, USD/CAD, AUD/USD, NZD/USD
Minors: EUR/GBP, EUR/JPY, GBP/JPY, AUD/JPY
Exotics: USD/TRY, USD/ZAR, USD/MXN

Every forex quote has two prices: the bid and the ask. The bid is what the market will pay to buy the base currency from you. The ask is what you must pay to buy the base currency from the market. The difference between them is the spread, and it represents the broker's compensation for facilitating the trade.

A pip — short for “percentage in point” — is the smallest price move most pairs can make. For EUR/USD, one pip is 0.0001. For USD/JPY, it is 0.01 because the yen is quoted to two decimal places. A standard lot is 100,000 units of the base currency. Mini lots are 10,000 units, and micro lots are 1,000 units.

Currencies are ultimately a reflection of economic health and policy. The three dominant drivers are interest rates, central bank policy, and geopolitical stability. When a central bank raises interest rates, its currency typically strengthens because higher yields attract foreign capital.

Inflation data, employment reports, and GDP growth all feed into rate expectations. Traders watch economic calendars closely because a surprise Non-Farm Payrolls number or CPI print can move the US dollar hundreds of pips in minutes. Geopolitical events — elections, wars, trade disputes — add uncertainty and can trigger flight-to-safety flows into currencies like the US dollar, Swiss franc, or Japanese yen.

The forex market is open 24 hours a day, five days a week. It is divided into four major sessions: Sydney, Tokyo, London, and New York. Each session has its own personality. The Asian session tends to be range-bound and lower in volume. The London session is the most liquid. The New York session brings additional volatility, especially during the London-New York overlap.

The overlap between London and New York — roughly 8:00 AM to 12:00 PM EST — is when the majority of daily volume transacts. Spreads tighten, trends are more reliable, and breakout strategies often perform best. If you can only trade a limited number of hours, this overlap is historically the most favorable window.

Before you place a single trade, you must understand leverage and its double-edged nature. Leverage allows you to control a large position with a small deposit. At 1:100 leverage, a $1,000 margin deposit controls $100,000 worth of currency. This magnifies both gains and losses.

Risk management starts with position sizing. A widely accepted rule is to risk no more than 1-2% of your account on any single trade. This ensures that a string of losses — which every trader experiences — does not destroy your capital. Always use a stop-loss order: a predetermined price at which your trade will automatically close to prevent further losses.