The Bank for International Settlements measured global currency turnover at roughly $7.5 trillion a day in its last triennial survey. That is more than the world's stock exchanges combined, traded around the clock from Monday morning in Sydney to Friday evening in New York. Forex trading, at its core, is taking part in that market: buying one currency, selling another, and winning or losing on the change in the exchange rate between them.
What you actually buy and sell
Currencies trade in pairs. EURUSD at 1.0850 means one euro buys 1.0850 US dollars. Buy the pair and you are long euros and short dollars; sell it and the positions reverse. Every trade is simultaneously a purchase and a sale, which is why a falling market is as tradeable as a rising one.
Pairs come in families. The majors pair the US dollar with the other large economies and carry the tightest trading costs. Crosses skip the dollar entirely. Exotics pair a major currency with an emerging market one and cost far more to trade. The full breakdown is in our guide to currency pairs, but a beginner needs exactly two or three pairs, not thirty.
Price moves are measured in pips, the fourth decimal place on most pairs. A move from 1.0850 to 1.0860 is ten pips. What a pip is worth depends on your position size, and that calculation, covered in our pip guide, is the first piece of arithmetic every trader has to own.
Who is on the other side
The interbank market sits at the centre: large banks quoting each other prices in amounts of tens or hundreds of millions. Around them trade hedge funds, corporates hedging revenue, central banks managing reserves, and payment companies moving money for clients. Retail traders reach this market through brokers, who aggregate prices from liquidity providers and pass them on with a spread or a commission added.
Most retail forex outside the United States is traded as contracts for difference. You never take delivery of the currency; the contract settles the difference between your entry and exit price. That structure is what makes small accounts, fractional lots and high leverage possible, and it is also why the product is treated as a high-risk instrument by every serious regulator.
What moves currency prices
Interest rates first. Money flows toward yield, so when a central bank raises rates faster than its peers, its currency tends to strengthen. Scheduled economic data moves prices because it changes rate expectations: inflation prints, employment reports, growth figures. The reaction is to the surprise, the gap between forecast and actual, rather than to the headline number itself.
Then there are flows and sessions. London handles the largest share of daily volume, and each session has its own character; the session guide explains why the same pair behaves differently at 3am and 3pm. Politics, risk sentiment and positioning do the rest. No single factor explains any single day, which is why honest traders talk in probabilities rather than certainties.
What a trade costs
Three costs, all visible if you look for them. The spread is the gap between the buy and sell price, paid on entry. Some account types charge a commission per lot instead of widening the spread. And a position held past 5pm New York pays or earns swap, the overnight interest differential between the two currencies. On a quiet major pair these costs are small per trade. Multiplied across fifty careless trades a week, they are the whole reason an otherwise break-even trader ends the month down.
Leverage, the accelerant
Brokers let you control positions many times larger than your deposit. At 1:30 leverage, $1,000 of margin controls $30,000 of currency. The arithmetic is symmetrical: a 1% move in your favour is a 30% gain on that margin, and the same move against you takes nearly a third of the account. Regulators in the EU, UK and Australia cap retail leverage at 30:1 on majors for exactly this reason. Read how leverage works before funding anything, because the margin call mechanism is where most first accounts end.
Trading currencies with leverage is high-risk. A majority of retail CFD accounts lose money, a fact regulators oblige brokers to publish on their own websites. Nothing here is investment advice; it is a description of how the machine works.
Starting without burning the first account
The sensible path is boring. Open a demo, learn the platform mechanics until order entry is automatic, then trade the smallest live size your broker allows. Micro lots exist so that your tuition costs tens of dollars, not thousands. Fix a maximum risk per trade as a percentage of the account and refuse to take any position without a stop loss. Keep a record of every trade and review it weekly.
What separates the traders still here in year three is rarely a secret entry method. It is sizing, patience and the discipline to stay small while the skill is still forming. The market has been open for decades. It will still be open when you are ready.
"Beginners ask me for a strategy on day one. I ask them what a pip costs at their position size. If the answer takes more than five seconds, the strategy does not matter yet."
— Alex Onta, Executive Director, SINGUARD
Key Takeaways
- Forex is traded in pairs; every position is long one currency and short another, so falling markets are as tradeable as rising ones.
- Retail access runs through brokers and CFDs; spread, commission and swap are the recurring costs that decide marginal accounts.
- Leverage scales losses and gains identically; regulators in the EU, UK and Australia cap it at 30:1 on major pairs.
- Start on demo, go live at micro size, fix risk per trade and log everything; sizing discipline outlasts any entry method.
Frequently Asked Questions
How much money do you need to start trading forex?
Many brokers accept small opening deposits and micro lots let you trade with limited capital, but the account must be able to absorb a normal losing streak at your chosen risk per trade. Whatever the size, it should only ever be money you can afford to lose.
Is forex trading legal?
Yes, in most countries, through brokers licensed by the local regulator. Rules differ by jurisdiction, including leverage caps and product restrictions, so the practical question is whether a given broker is authorised to serve clients in your country.
Can you practise forex trading without risking money?
Demo accounts mirror live pricing and are the right place to learn platform mechanics. They cannot reproduce the psychology of real losses, which is why the step after demo is the smallest possible live size rather than a full account.