What is forex? The currency market explained simply

Forex, or the foreign exchange market, is the most liquid financial market in the world: it's where currencies are traded against each other, twenty-four hours a day, five days a week. It's often the first entry point into trading, because major pairs are accessible with little capital and the market almost never closes. This guide explains simply what forex is, how a quote works, how sessions are structured, and what sets this market apart from others.

• Forex is currency exchange in pairs: you buy one currency by selling another.
• The market runs 24 hours a day on weekdays through the chain of four major global sessions.
• Spread and pip are the basic units for reading a quote and computing transaction cost.
• Leverage amplifies everything, gains and losses alike: it's the ingredient that makes forex both appealing and dangerous.

Unlike a stock or a commodity, a currency only has value relative to another one. That's what makes forex a bit confusing at first: you never trade a single asset, you always trade a ratio between two currencies. Understanding this basic mechanism changes the way you read any quote, and it's the first thing to absorb before getting started.

This guide starts from the simplest possible definition and builds up progressively: what a currency pair is, how to read a price, who participates in this market, how sessions work, and why leverage fundamentally changes the risk profile compared to other markets.

What forex is

The word forex comes from the contraction of 'foreign exchange'. This market exists because every country has its own currency, and international trade, tourism, and cross-border investment constantly require converting one currency into another. A European company buying goods from the US has to convert euros into dollars, a traveler abroad has to exchange their currency, and these flows, multiplied across thousands of participants, form the basis of the currency market.

Forex has no single physical location, unlike a stock exchange. It's a decentralized, over-the-counter market, where trades happen directly between banks, brokers and electronic platforms connected worldwide. This structure partly explains why the market can stay open continuously: when one session closes somewhere on the planet, another opens elsewhere, without interruption from Monday morning in Asia to Friday evening in the US.

How a currency pair works

In forex, you never trade a single currency: you always trade a pair, made up of a base currency and a quote currency. The EUR/USD pair, for example, expresses how many dollars it takes to buy one euro. If EUR/USD quotes at 1.0850, that means one euro is worth 1.0850 dollars. Buying this pair means betting the euro will strengthen against the dollar; selling it means betting the opposite.

Pairs fall into three broad families. Majors pair the US dollar with another major currency (EUR/USD, GBP/USD, USD/JPY) and concentrate most of the world's volume, with the tightest spreads. Minors, or crosses, don't contain the dollar (EUR/GBP, EUR/JPY) and remain liquid, though somewhat less than majors. Exotics pair a major currency with that of an emerging economy (USD/TRY, USD/ZAR): they often offer bigger moves, but with wider spreads and more irregular liquidity.

Reading a quote: pip, spread and bid/ask

Every forex quote actually shows two prices: the bid, the price at which you can sell, and the ask, the price at which you can buy. The difference between the two is called the spread, and it's the implicit cost of every transaction, collected by the broker or market maker. The more liquid a pair, the tighter its spread tends to be; a less traded, exotic pair usually shows a noticeably wider spread.

The pip is the standard unit for measuring price movements in forex, generally the fourth decimal of a quote (the second for pairs including the yen). If EUR/USD moves from 1.0850 to 1.0855, the price has moved 5 pips. This shared vocabulary lets traders talk about the size of a move or a stop independent of the displayed price, and it's the basis for calculating position size and risk in your account currency.

The four major sessions

Forex runs continuously through the chain of four major financial hubs spread across the globe: Sydney opens the week, followed by Tokyo, then London, then New York, before the cycle starts again. Each session has its own personality: the Asian session is often calmer and tighter, the London session typically brings the most volume and volatility to European pairs, and the overlap between London and New York traditionally concentrates the day's sharpest moves.

Understanding this time structure helps decide when to trade, especially for a beginner looking for more predictable conditions. A pair like EUR/USD is generally more active during the London/New York overlap, while a pair like USD/JPY reacts more to Asian hours. Trading a pair outside its natural hours of activity often exposes you to more erratic moves and wider spreads, two conditions unfavorable to a plan built around normal conditions.

Who trades forex

Forex is above all an institutional market. Central banks intervene to manage their reserves or influence their currency, large commercial banks handle most of the flow tied to international trade, and investment funds speculate on interest rate differentials and macroeconomic trends between countries. These players account for the vast majority of the volume traded every day.

Retail traders, individual participants, only make up a marginal share of that total volume, but have far broader access than twenty years ago thanks to online brokers. This difference in scale has a direct consequence: a retail trader can't expect to move the market, they simply have to adapt to the moves generated by these much heavier players. That's one reason following the economic calendar and central bank decisions stays central in forex, more so than in many other markets.

Leverage, a central ingredient of forex

Forex stands out for the availability of often high leverage, which lets you control a position much larger than the capital actually deposited. A leverage of 30:1 means 1,000 euros of margin lets you control a 30,000 euro position. This mechanism largely explains why forex attracts so many new traders: it makes accessible price moves that, without leverage, would seem too small to generate a meaningful result.

But leverage is a double-edged sword that must be respected absolutely. It amplifies gains exactly as it amplifies losses, and a position oversized relative to capital can turn a normal price move into a severe loss. Leverage creates no edge on its own: it simply scales up whatever happens, for better or worse. That's why a rigorous position size calculation, independent of the maximum leverage offered by the broker, is essential from your very first trades.

Leverage doesn't make a bad trade better: it just makes its consequences faster, in either direction.

How forex differs from other markets

Compared to stocks or commodities, forex has specifics that change how you approach it. First, there's no daily 'close' in the sense a stock trader knows it: the market stays open continuously from Sunday evening to Friday evening, which imposes a different discipline around trading hours and sleep management for a retail trader. Second, forex is structurally more sensitive to macroeconomic data (interest rates, inflation, employment) than to company-specific news, since a currency reflects the economic health of an entire country.

Finally, the extreme liquidity of major pairs makes forex generally less prone to the sharp gaps some stocks can see around quarterly earnings, except during major macro events or surprise central bank decisions. This continuous liquidity is an advantage for execution, but it doesn't excuse you from managing risk with the same rigor as on any other market: the ease of accessing forex should never be confused with an ease of extracting a regular profit from it.

Common mistakes beginners make in forex

The first mistake, by far the most common, is using maximum leverage simply because the broker offers it. A 1,000 euro account with 500:1 leverage can technically open a 500,000 euro position, but a move of a few dozen pips is then enough to wipe out all the capital. Available leverage isn't a recommendation to use it in full: it's a maximum ceiling, and the position size actually suited to you depends only on your stop's distance and the percentage of capital you accept to risk, never on the maximum leverage displayed.

The second classic mistake is ignoring the economic calendar and getting caught off guard by a major release, like US employment figures or a central bank rate decision, which can move a pair dozens of pips within seconds. The third is wanting to trade too many pairs at once from the start, spreading your attention thin, rather than focusing on one or two major pairs to learn their usual behavior, active hours and typical reactions to news. Depth on one pair almost always beats breadth across ten.

How Tradoshi helps you with forex

Whether you're starting on EUR/USD or expanding into minor pairs, Tradoshi centralizes your forex trades in a journal that automatically computes your risk in pips and percentage of capital, without you reaching for a calculator on every position.

• Position size calculator built for forex: pips, lot, leverage and account currency.
• Automatic sync with your MT4/MT5 account, read-only.
• Per-pair statistics to see where your edge is real across majors, minors or exotics.
• Built-in economic calendar to anticipate releases that move your pairs.

Frequently asked questions