What Is Leverage in Forex? How It Works, Limits and Risks

How leverage works

Leverage is expressed as a ratio. The margin requirement is its inverse:

margin requirement (%) = 100 ÷ leverage ratio · required margin = position value ÷ leverage

Leverage	Margin requirement	Margin for a $100,000 position
10:1	10%	$10,000
20:1	5%	$5,000
30:1	3.33%	$3,333
50:1	2%	$2,000

Leverage magnifies gains and losses

The same move with and without leverage

You have $2,000 and EUR/USD moves 1% against you.

• Without leverage (a $2,000 position): you lose $20 — 1% of your account.
• With 30:1 leverage used in full (a $60,000 position): you lose $600 — 30% of your account.

Leverage does not make a trade better or worse; it makes it bigger. The percentage move in the currency pair is identical — only the effect on your account changes.

Maximum vs effective leverage

The leverage your broker offers is a maximum. What determines your risk is effective leverage:

effective leverage = total position value ÷ account equity

Account balance	Broker’s maximum leverage	Position opened	Effective leverage	Loss on a 1% adverse move	Adverse move that wipes out the account
$10,000	30:1	$10,000	1:1	$100	100%
$10,000	30:1	$50,000	5:1	$500	20%
$10,000	30:1	$300,000	30:1	$3,000	3.3%
$10,000	500:1	$10,000	1:1	$100	100%
$10,000	500:1	$5,000,000	500:1	$50,000 — more than the account	0.2%

The first and fourth rows carry exactly the same risk, even though one account offers 500:1 leverage. What changes the risk is the position you open, not the maximum your broker allows. (The last column ignores trading costs; in practice a margin call or stop out would close positions before the account reaches zero.)

Regulatory leverage limits

Region	Major currency pairs	Other pairs
European Union (ESMA rules, national regulators)	30:1	20:1
United Kingdom (FCA)	30:1	20:1
United States (CFTC/NFA)	50:1 (2% minimum deposit)	20:1 (5% minimum deposit)

These caps apply to retail clients. EU and UK rules also require brokers to close out positions when account equity falls to 50% of the total required margin and to protect retail clients from a negative balance. Brokers regulated elsewhere may offer much higher leverage — and correspondingly less protection.

Using leverage responsibly

• Size positions from your risk per trade, not from available margin — see lot size.
• Always use a stop loss.
• Keep effective leverage low, especially while learning.
• Understand how your broker handles margin calls and stop outs.

Check your numbers with the margin calculator.