Leverage is one of the first things new forex traders notice, and one of the most misunderstood. It lets you control a large position with a relatively small deposit, which is why forex is accessible to people without huge accounts. But leverage works in both directions: it magnifies losses exactly as much as it magnifies gains. This guide explains how leverage and margin work, walks through examples, and shows how to use leverage responsibly.
What is leverage in forex?
Leverage is borrowed buying power provided by your broker. It is usually shown as a ratio, such as 1:10, 1:30 or 1:100. A ratio of 1:100 means that for every $1 in your account set aside for a trade, you can control $100 of currency.
Forex is traded in lots:
- A standard lot is 100,000 units of the base currency.
- A mini lot is 10,000 units.
- A micro lot is 1,000 units.
Without leverage, buying one standard lot of EUR/USD would require roughly the full value of the position. With leverage, you only need to put up a fraction of it.
What is margin?
Margin is the money your broker sets aside from your account to open and keep a leveraged position. It is not a fee; it is a deposit that is returned when you close the trade, adjusted for any profit or loss.
The relationship is simple:
Required margin = position size ÷ leverage
Three related terms you will see on your platform:
- Used margin: the total margin currently locked in open positions.
- Free margin: equity minus used margin; the amount available to open new trades or absorb losses.
- Margin level: equity ÷ used margin × 100, shown as a percentage. The lower it gets, the closer you are to a margin call.
A worked example
Suppose you have a $1,000 account and want to buy one mini lot (10,000 units) of EUR/USD at 1.1000. The position is worth about $11,000.
- At 1:100 leverage, required margin is $11,000 ÷ 100 = $110.
- At 1:30, it is $11,000 ÷ 30 ≈ $367.
- At 1:10, it is $1,100, more than your account, so you could not open the trade.
Now say EUR/USD moves 50 pips. On a mini lot, one pip is worth about $1, so the trade gains or loses about $50. That is 5% of your account, whichever leverage you used to open it.
This is the key point many beginners miss: your profit or loss depends on your position size, not your leverage ratio. Higher leverage simply lets you open bigger positions with less margin. The danger is that it makes it easy to open positions that are far too big for your account.
How leverage magnifies gains and losses
Using the same $1,000 account, compare two traders who both see EUR/USD move 100 pips against them:
- Trader A opens one micro lot. A 100-pip loss is about $10, or 1% of the account.
- Trader B uses high leverage to open one standard lot. A 100-pip loss is about $1,000, the entire account.
Both had access to leverage. Only one used it to take a position the account could survive. Leverage did not cause the loss; the position size did.
Margin calls and stop-outs
As a leveraged trade moves against you, your equity falls and your margin level drops. Two thresholds matter:
- Margin call: a warning that your margin level has fallen below a set level. You may need to add funds or reduce positions.
- Stop-out: if the margin level keeps falling, the platform automatically starts closing positions, usually the largest losers first, to stop your balance going negative.
Exact levels vary by broker and account, so check your account terms. In fast markets, such as around major news, prices can gap, and losses can exceed what you expected before a stop-out takes effect.
Choosing a sensible leverage level
The maximum leverage a broker offers is a ceiling, not a target. Experienced traders often use far less effective leverage than they are allowed. Consider:
- Your experience. Beginners benefit from lower leverage while they learn how quickly positions can move.
- Your strategy. Short-term traders may use more margin intraday; longer-term traders usually need more room for normal price swings.
- Volatility. Crypto pairs and exotic currencies move more than major pairs, so the same leverage carries more risk.
- Effective leverage. Divide your total open position value by your account equity. Keeping this modest is more important than the headline ratio.
Using leverage responsibly
- Size positions from risk, not margin. Decide how much of your account you are willing to lose on a trade (many traders use 1–2%), set a stop-loss, and calculate the position size from that.
- Always use a stop-loss. It defines your maximum loss before you enter.
- Keep free margin in reserve. Do not commit most of your account as margin; leave room for adverse moves.
- Watch correlated trades. Several positions in related pairs can add up to one large, highly leveraged bet.
- Practise first. A demo account lets you see how leverage behaves without risking money.
Our guide to managing risk when trading forex covers position sizing in detail, and 10 common forex trading mistakes explains why over-leveraging is near the top of the list.
Leverage and trading costs
Leverage lets you open larger positions, and costs scale with position size. Spreads, commissions and overnight financing on a leveraged position are calculated on the full position value, not on the margin you put up. A trade that looks cheap relative to your margin can be expensive relative to your account. See Understanding Forex Spreads, Commissions, and Trading Fees for how to calculate them.
Leverage on crypto pairs
Crypto pairs can move several percent in a single session, far more than most major currency pairs. That means the same leverage ratio exposes you to much larger swings in account equity. Many traders use noticeably smaller position sizes on crypto pairs, widen their stops to allow for normal volatility, and avoid holding large leveraged crypto positions through weekends when liquidity can be thinner.
Choosing your leverage at Clarity FX
At Clarity FX you select the leverage that fits your trading style when you open an account. You can compare the options on the account types page, and open a demo account first to practise before trading live.
Key takeaways
- Leverage lets you control a large position with a small amount of margin.
- Required margin = position size ÷ leverage.
- Profit and loss depend on position size; high leverage just makes oversized positions easy to open.
- Margin calls and stop-outs protect against negative balances but can close trades at a loss.
- Size trades from the amount you are prepared to lose, and use a stop-loss on every trade.
Trading forex and crypto on leverage carries a high risk of loss and may not be suitable for all investors. This article is educational and not financial advice. Read our risk disclosure.