Forex Basics

The foreign exchange market — forex, or FX — is where one currency is exchanged for another. It is the largest financial market in the world by turnover. The Bank for International Settlements, which surveys the market every three years, measured average trading of $9.6 trillion per day in April 2025, up 28% from 2022. The US dollar was on one side of 89% of all trades. That figure is a snapshot, not a constant: it is remeasured every three years and it moves.

Most of that volume has nothing to do with speculation. It is banks, corporations, asset managers, exporters and central banks moving money and hedging currency risk. Retail trading is a small slice of a market built for something else — which is worth remembering whenever forex is marketed as a personal income strategy.

This library covers the parts of forex that do not expire: what a currency pair is, how the market is structured, the difference between spot, forward, futures and options markets, and what fundamental analysis actually looks at. It deliberately does not cover strategies, entry signals, indicator setups or broker recommendations.

Two things change often enough that nothing here should be treated as current: regulation and broker terms. Leverage limits, margin requirements, product availability and even whether retail forex trading is legal at all depend on where you live and who your account is with. In the United States, retail forex is regulated by the CFTC and NFA, and leverage on major pairs is capped well below what offshore brokers advertise. In the EU and UK, ESMA and FCA rules cap it differently again. Check the rules in your own jurisdiction with the regulator directly, not with a broker's marketing page.

The honest framing: forex is a real market with real mechanics worth understanding, and retail speculation in it is a high-risk activity where losing money is the common outcome. Regulated brokers in several jurisdictions are required to publish the percentage of retail accounts that lose money — read those numbers before you read anyone's strategy.