Forex Trading Guide for Beginners

How forex trading works, in one sentence: you exchange one currency for another hoping that the exchange rate moves in your favour, then reverse the trade. The rest of this guide is the detail that decides whether that sentence costs you money: how quotes are written, how the size of a move turns into dollars, what leverage really does and when the market is busy.

Reading a currency pair

Every forex price involves two currencies. In GBP/USD 1.2700, the pound is the base currency and the US dollar is the quote currency: one pound costs 1.27 dollars. If you think the pound will rise, you buy the pair; if you think it will fall, you sell it. There is no separate "short selling" process as there is with shares: selling a pair is simply the opposite trade.

Quotes come in pairs of prices: you sell at the lower one, the bid, and buy at the higher one, the ask. The difference is the spread. On a busy major pair the spread may be a fraction of a pip; on minor and exotic pairs, or when a market has just opened, it is wider.

Pairs are grouped loosely into majors (the US dollar against the euro, yen, pound, Swiss franc, Canadian, Australian and New Zealand dollars), crosses that leave out the dollar, such as EUR/GBP, and exotics that pair a major with a smaller currency. Liquidity, and therefore cost, falls as you move down that list.

Pips, lots and what a move is worth

A pip is the standard unit of change: 0.0001 for most pairs and 0.01 for pairs quoted in Japanese yen. Trade size is measured in lots: a standard lot is 100,000 units of the base currency, a mini lot 10,000 and a micro lot 1,000.

When the US dollar is the quote currency, one pip on one standard lot is worth $10. So on 0.5 lots it is worth $5. For other pairs the value depends on the exchange rate, which our pip calculator handles for you.

Worked example (illustrative figures)

You buy 0.5 lots of GBP/USD at 1.2700 and place a stop-loss at 1.2660, 40 pips below. Each pip is worth $5, so if the stop is hit you lose 40 × $5 = $200, plus the spread and any financing. If instead the price reaches 1.2780, an 80-pip rise, you gain 80 × $5 = $400 before costs.

Notice what decides the size of that loss: the distance to the stop and the lot size, not the leverage. The position size calculator works backwards from the loss you are prepared to take to the lot size that fits.

Leverage and margin

Because major pairs usually move less than 1% in a day, retail forex is almost always traded on margin. You put up a deposit and the broker lets you control a much larger position. Using the same example, 0.5 lots of GBP/USD is 50,000 pounds, worth about $63,500 at 1.2700. At 30:1 leverage the margin required is $63,500 ÷ 30 ≈ $2,117.

Regulators cap leverage for retail clients: 30:1 on major pairs and 20:1 on others in the UK, EU and Australia, and 50:1 on majors and 20:1 on others in the US. If losses reduce your equity to half the margin required in the UK or EU, the broker is required to begin closing trades, and those clients cannot lose more than the money in their account. Offshore firms that offer 500:1 or more are usually outside these protections altogether. Try the margin calculator to see how quickly margin is used up.

Trading sessions and when prices move

Trading resumes each Sunday at 17:00 in New York, which is already Monday morning in Wellington and Sydney, and stops on Friday at 17:00 New York time. Activity follows the sun through three broad sessions:

• Asian hours: centred on Tokyo, Singapore and Hong Kong, with the yen and the Aussie dollar in focus.
• European hours: London dominates, and activity in the euro, sterling and franc picks up sharply.
• American hours: New York's morning overlaps London's afternoon, usually the liveliest stretch of the day.

Every day at 17:00 New York time, open positions are rolled to the next value date and the broker charges or pays a financing amount called swap. Because of settlement conventions, the Wednesday rollover usually carries three days' worth.

What moves exchange rates

Central bank interest rates are the single biggest driver: a currency tends to strengthen when markets expect its rates to rise relative to others. Inflation, employment and growth figures matter because they shape those expectations, which is why rates often jump when data is released. Political shocks and shifts in risk appetite matter too; in stressed markets money has historically flowed toward the US dollar, the Japanese yen and the Swiss franc. None of these relationships is reliable enough to trade on blindly.

Testing an idea before risking money

Forex backtesting means applying a set of trading rules to past price data to see how they would have behaved. It can expose rules that never worked, but it flatters rules that were tuned to fit the past, and it usually understates costs such as spreads widening around news. Treat a good backtest as a reason to test further on a demo account, not as evidence of future profit. Our guide to MetaTrader 5 Web explains what charting software can and cannot do.

How forex trading works from start to finish

Putting the pieces together, a single retail trade usually runs through the same steps:

1. Form a view and a plan. Decide why you expect the pair to move, where you would be proven wrong (the stop-loss) and where you would take profit.
2. Size the position. Choose the amount you are prepared to lose, often a small percentage of the account, and work out the lot size from the stop distance.
3. Check the margin. Make sure the required margin leaves plenty of free balance to absorb normal swings.
4. Place the order. Use a market order to enter now or a limit or stop order to enter at a set level, and attach the stop-loss and take-profit.
5. Manage and close. The position is closed by your stop, your target, a manual exit or, if losses mount, by the broker's margin close-out.
6. Review. Record the result including all costs. A written log shows patterns that memory hides.

Mistakes beginners make most

• Sizing from the account, not the stop: opening a full lot because the margin allows it, whatever the stop distance.
• Moving the stop further away once a trade goes wrong, which turns a planned small loss into a large one.
• Trading through major announcements without realising spreads widen and prices can jump past stops.
• Holding leveraged trades for weeks without counting the overnight financing.
• Chasing losses with bigger trades to win back money quickly.

None of these requires special knowledge to avoid; they require deciding the rules before the trade is open, when you are calm.

What forex costs

• Spread: paid every time you open and close.
• Commission: some account types charge a fixed fee per lot in exchange for a narrower spread.
• Swap: the overnight financing on leveraged positions.
• Conversion: if your account currency differs from the pair's quote currency.

We break these down with examples in trading fees explained. Before you trust any provider, work through how to choose a broker; retail bonuses are banned by UK, EU and Australian regulators, so a broker offering one is a warning sign in itself.

Sources

• UK Financial Conduct Authority, CFD rules for retail clients
• European Securities and Markets Authority, CFD product intervention measures
• US Commodity Futures Trading Commission and National Futures Association, retail forex leverage limits