Foreign Exchange Basics

In forex you never buy a currency alone — you always trade a pair, betting that one currency will strengthen against the other. EUR/USD is the euro against the US dollar; USD/JPY is the dollar against the Japanese yen; GBP/USD is the British pound against the dollar.

Every pair has two sides. The first currency is the base currency — the one you are effectively buying or selling. The second is the quote currency — the one the price is measured in. If EUR/USD trades at 1.08, one euro buys 1.08 dollars. Buy the pair and you are betting the euro rises against the dollar; sell it and you are betting the opposite. Every forex trade is simultaneously a buy of one currency and a sale of the other.

Price moves are measured in pips — the smallest standard move, usually the fourth decimal place (0.0001 for most pairs). If EUR/USD rises from 1.0800 to 1.0850, that is a 50-pip move. Your profit or loss per pip depends on your position size, measured in lots: a standard lot is 100,000 units of the base currency, a mini lot is 10,000, and a micro lot is 1,000. Beginners belong in micro lots — a 50-pip move on one micro lot of EUR/USD is roughly $5, not $500. Size is the volume knob on risk, and forex lets you turn it dangerously high.

Currencies move on economics, not earnings reports. The big drivers:

• Interest rates — the heavyweight. When a central bank (the Federal Reserve, the European Central Bank, the Bank of Japan) raises rates, that country's currency typically strengthens, because global money chases higher yields. Rate decisions and even hints about future decisions move markets violently.
• Economic data — jobs reports, inflation numbers, GDP growth. Strong data usually lifts a currency (it signals future rate hikes); weak data sinks it.
• Central bank policy and politics — elections, trade policy, geopolitical crises. Currencies are national reputations priced by the minute, and "safe haven" currencies (the dollar, the Swiss franc, the yen) surge when the world gets scared.

This means forex is a macro game: you are trading the economic weather of entire countries. Economic calendars (TF-105) are mandatory equipment — trading blind into a central bank announcement is gambling, and the leverage (below) makes it expensive gambling. You do not need an economics degree, but you do need to know which announcements move your pairs and when they land.

Forex brokers rarely charge commissions. They make their money on the spread — the gap between the buy and sell price, measured in pips. On EUR/USD the spread might be 1 pip; on an exotic pair (dollar vs. Turkish lira, say) it can be 20+ pips. Every trade starts underwater by the spread, and frequent trading on wide-spread pairs bleeds accounts dry. Major pairs (EUR/USD, USD/JPY, GBP/USD) have the tightest spreads and the calmest behavior — beginners should stay with majors.

The second cost is rollover (also called swap): the interest difference between the two currencies, credited or charged when you hold a position overnight. Buy a high-interest currency against a low-interest one and you earn a small daily credit; do the reverse and you pay. For day traders who close everything daily, rollover barely matters. For anyone holding days or weeks, it compounds — sometimes for you, sometimes against you. Check the swap rates before holding overnight; some exotic pairs charge punishing negative rollover.

Add the usual suspect: slippage around news events (TF-105). During a central bank surprise, spreads can widen 10-fold in seconds and stop-losses fill far from their levels. Never assume calm-market costs apply during announcements.

Three structural facts define forex — two are features, one is a warning.

The market never sleeps (almost). Forex trades 24 hours a day, five days a week, rolling through the Asian, European, and US sessions. The busiest and most liquid window is the London–New York overlap (roughly 8 AM–12 PM Eastern), when spreads are tightest and moves are cleanest. The quiet Asian hours can be choppy and thin — many beginners get chopped up trading at midnight because the market was open, not because it was tradeable.

The leverage is extreme. US-regulated brokers allow up to 50-to-1 leverage on majors (less on exotics); offshore brokers advertise 200-to-1, 500-to-1, even 1000-to-1. At 50-to-1, a 2% move against you wipes the position. At 500-to-1, a 0.2% wiggle — market noise — does it. High leverage does not increase your edge; it only accelerates the outcome, and for beginners the outcome is usually ruin. Trade micro lots, use a fraction of the available leverage, and let the 1% risk rule (TF-106) — not the broker's maximum — decide your size.

Your broker is your counterparty. Unlike stock exchanges, most retail forex is traded over-the-counter: your broker takes the other side of your trade or routes it to liquidity providers. That makes broker choice a safety decision, not a shopping decision. Use only brokers regulated in serious jurisdictions (in the US, registered with the CFTC and NFA) — regulation means segregated client funds and real oversight. Unregulated offshore brokers offering 500-to-1 leverage and deposit bonuses have a long history of withdrawal "problems." If a broker fails or freezes your money, no trade setup in the world gets it back.

Forex is a real, enormous, legitimate market — and a graveyard for the undercapitalized and overleveraged. Respect the leverage, stay with majors and micro lots, use a regulated broker, and run every trade through the same plan, risk rules, and simulation gate as everything else in this school.

Currencies and futures are markets. The last lesson is about the businesses that sell traders access to capital — and why you should read their fine print twice. TF-113 "Prop Firms" is the buyer-beware finale: how the fee model really works, what evaluation rules hide, and what payouts actually look like.