Forex Basics
Forex basics, explained from the ground up
Forex is the market for exchanging one currency for another, quoted in pairs such as EUR/USD. A trade is a view on one currency relative to the other. The core mechanics to learn first are how pairs are priced, what a pip and a lot measure, and how leverage and margin magnify both gains and losses. None of this is a promise of profit; it is the vocabulary you need before risking anything.
What the foreign exchange market is
The foreign exchange market, usually shortened to forex or FX, is where currencies are bought and sold against one another. It is the largest and most liquid financial market in the world, open around the clock on weekdays as trading moves between major financial centers. Unlike a stock exchange, there is no single central marketplace; trades happen electronically between banks, brokers, and traders, which is why forex is described as an over-the-counter market.
Every forex trade involves two currencies, so prices are always quoted as a pair. When you trade EUR/USD, you are taking a view on the euro relative to the US dollar. If you expect the euro to strengthen against the dollar, you would buy the pair; if you expect it to weaken, you would sell. Because you are always long one currency and short the other, there is no single direction that is inherently safer.
Reading a currency pair quote
In a pair like GBP/USD, the first currency is the base currency and the second is the quote currency. The price tells you how many units of the quote currency it takes to buy one unit of the base currency. If GBP/USD is 1.2500, one British pound costs 1.25 US dollars. When the price rises, the base currency is strengthening; when it falls, the base currency is weakening.
You will also see two prices at once: the bid (where you can sell) and the ask (where you can buy). The gap between them is the spread, which is a cost of trading you pay on every position. Major pairs that include the US dollar tend to have the tightest spreads because they trade in the highest volume.
Pips, lots, leverage, and margin
A pip is the standard smallest increment most pairs move in, typically the fourth decimal place of the price. It is the unit traders use to measure how far a price has moved. A lot is the size of a trade. A standard lot is 100,000 units of the base currency, a mini lot is 10,000, and a micro lot is 1,000, so smaller lot sizes let you trade with less money at risk per pip.
Leverage lets you control a larger position than your account balance alone would allow, and margin is the deposit your broker sets aside to hold that position. Leverage is the part beginners most often underestimate: it multiplies the effect of every price move in both directions, so it increases the size of losses just as much as gains. Using high leverage is one of the fastest ways inexperienced traders lose money, which is why understanding it sits at the center of forex basics.
Key points
What to understand
- Trade pairs, not single currencies. Every position is a view on one currency relative to another, so you are always long one and short the other.
- Know the spread is a cost. The gap between bid and ask is paid on every trade; tighter spreads on major pairs cost you less.
- Size positions in lots. Standard, mini, and micro lots control how much each pip is worth, and therefore how much you risk.
- Respect leverage. It magnifies losses exactly as much as gains; high leverage is a leading reason beginners lose accounts.
- Learn the words before the money. Pip, lot, margin, and spread are the vocabulary you need before placing a single real trade.
Resources
Tools and resources for this topic
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Links readers to the full plain-English glossary on this site.
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