Direct pair trading

Buy one currency and sell another simultaneously through a retail forex broker. You profit if the exchange rate moves in your favour. US retail traders can access up to 50:1 leverage on major pairs — powerful but dangerous. Brokers include OANDA, Interactive Brokers, and IG.

Easiest entry point

ETFs that track a single currency vs the US dollar — FXE (Euro), FXB (British Pound), FXY (Japanese Yen). They trade like stocks, require no special account, and carry no leverage. The simplest way for a retail investor to gain currency exposure without opening a forex account.

Standardised contracts

CME Globex futures contracts on major currency pairs — each contract is a fixed notional size (e.g., €125,000 for EUR/USD). More capital-efficient than spot forex and tightly regulated, but require a futures-enabled brokerage account and a solid understanding of margin and roll dates.

Hedging & leverage

Options on currency ETFs (e.g., FXE options) or on CME currency futures. Let you define your maximum downside while keeping upside exposure, or hedge existing foreign currency holdings. More complex than stocks options due to the cross-currency dynamic — study the Greeks before trading.