What Is Leverage in Trading? Forex Leverage and Margin Explained

Leverage is why a trader with £1,000 can open a position worth £30,000, and it is why so many of those traders lose the £1,000 in a week. Neither outcome is caused by leverage itself. It is a tool for posting less margin, and the damage comes from what people do with the room it creates.

What is leverage in trading?

Leverage means controlling a position that is larger than the money you put down. A broker offering 30:1 leverage lets you open a trade worth 30 times your deposit. The deposit is called margin.

Leverage and margin are the same fact written two ways. 30:1 is 1/30, which is 3.33%. 100:1 is 1%. If a broker tells you its margin requirement is 5%, that is 20:1 leverage.

A worked example

You have $10,000 in a trading account and buy one standard lot of EUR/USD at 1.0800. One lot is 100,000 euros, so the position is worth 100,000 x 1.08 = $108,000.

• At 30:1 leverage the margin is 108,000 / 30 = $3,600.
• At 100:1 it is $1,080.
• At 500:1 it is $216.

In every case you control the same $108,000. If EUR/USD rises 100 pips to 1.0900, the position gains 100 x $10 = $1,000, a 10% return on the account. If it falls 100 pips you lose $1,000. The leverage setting did not change either figure. It only changed how much of your $10,000 was locked up while the trade was open.

Run your own numbers in the margin calculator. It shows margin, position value and the pip value side by side.

Leverage is not risk

This is the part most beginners get wrong, and it is worth stating plainly.

Your risk on a trade is position size x distance to your stop. Both are set by you. Leverage does not appear in that formula.

Where leverage does matter is that it sets the maximum position you can open. With $10,000 at 30:1 you can hold at most about $300,000 of currency, which is roughly three standard lots. At 500:1 you could hold fifty lots. A 20 pip move against fifty lots of EUR/USD is $10,000, the whole account. The leverage did not force anyone to trade fifty lots. It just made the option available, and a surprising number of people take it.

The sensible approach is to ignore the leverage figure when sizing. Decide the cash you are prepared to lose, say 1% of the account. Measure your stop in pips. Divide one by the other, as explained in what is a pip, and the position size calculator will give you the lots. Then check that the margin for that size is comfortably within your free margin. If it is not, the trade is too big for the account, whatever the leverage.

How margin works day to day

Your platform shows four related figures.

• Balance: cash in the account, ignoring open trades.
• Equity: balance plus or minus the running profit on open trades. This is what you actually have.
• Margin (used margin): the deposit currently held against open positions.
• Free margin: equity minus used margin. Room for new trades, or for existing ones to move against you.

Margin level is equity divided by used margin, shown as a percentage. If you have $10,000 equity and $3,600 in use, the margin level is 278%. As losses mount, equity falls and the percentage drops.

Margin call and stop out

Brokers set two thresholds. A margin call is a warning, often at 100% margin level: your equity has fallen to the size of your deposit. A stop out, commonly at 50%, is when the broker starts closing your positions automatically, largest loser first, to protect itself and you.

Take the one-lot EUR/USD trade at 30:1. Margin is $3,600. Equity hits 50% of that, $1,800, after a loss of $8,200, which is 820 pips. On a single lot that is a long way. Open three lots with the same account and the stop-out arrives after about 270 pips instead, well inside a bad week. That is leverage being used, not leverage being dangerous.

Leverage limits in the UK

Since 2018, regulators in the UK and EU cap the leverage brokers may offer retail clients. The FCA rules are:

Alongside the caps come negative balance protection, which means you cannot lose more than the money in the account, a standard stop-out at 50% margin, and a ban on bonuses and incentives. These apply at FCA-regulated brokers to clients classed as retail.

Professional client status removes the caps. To qualify you typically need two of: a portfolio over €500,000, a year of relevant work in finance, and significant trading activity (ten large trades a quarter over the past year). You also give up negative balance protection. Offshore brokers offer 500:1 or more to anyone, with none of the protections. The higher figure is not a feature. Nothing in the examples above gets better with more leverage; only the stop-out gets closer.

Leverage, swap and holding overnight

Because the broker is effectively lending you most of the position, holding it past the daily rollover (10pm UK time) incurs a financing charge or credit called swap. It is based on the interest rate difference between the two currencies and on the full position size, not your margin. A small margin against a large position means the swap can be noticeable over weeks. The forex swap guide covers how it is calculated and when it works in your favour.

Prop firms and leverage

Funded accounts from prop firms usually offer 1:30 to 1:100, and the number matters even less there, because the firm's drawdown rules do the limiting. A 5% daily loss cap on a $100,000 account is $5,000. On EUR/USD that is a 50 pip move against ten lots, which 1:100 leverage would happily let you open. The firms that fail traders fastest are not the ones with low leverage. See what is a prop firm for how the rules fit together.

The rule to take away

Set risk in cash. Set the stop in pips. Let the calculator give you the size. Then confirm the margin fits. Leverage is the last thing to check, not the first, and if you do it in that order the number on your account application stops mattering very much at all.