Forex · Intermediate · 4 min

Leverage and margin in forex

You can calculate the margin needed for a forex position, explain how small currency moves turn into large account swings, and name the EU leverage limits.

Small moves, big leverage

Major exchange rates often move less than 1% in a day. Trading them without leverage would make for slow, small results. That is why almost all retail forex trading uses leverage.

It is also why so many retail forex accounts lose money. The lesson on leverage in the markets rubric covered the mechanics in general. This lesson applies them to forex, where small moves and high leverage meet.

1% × 30 = 30%

In leveraged forex, you post a deposit, the margin, and the broker lets you hold a much larger position. The margin requirement is the share of the position you must put up: at 30:1, about 3.3%.

How leverage changes the result:

At 1:1, a 1% move changes your deposit by 1%.
At 10:1, by 10%.
At 30:1, by 30%.

For retail clients in the EU, ESMA's 2018 rules, later made permanent by national regulators, cap leverage on CFDs, which is how most private traders trade forex:

30:1 for major currency pairs,
20:1 for other pairs.

The same rules require brokers to close positions when margin falls to 50% of the requirement, and protect retail clients from losing more than their account balance. Outside the EU, or for professional clients, leverage can be much higher. The SEC warns that in leveraged forex trading, losses can exceed the money initially invested, depending on the account.

Using less leverage than allowed is the simplest risk control. If only a small part of the account is tied up as margin, a normal move cannot wipe it out.

1.5% → −45%

A fictional trader has 3,600 dollars and buys 100,000 EUR/USD at 1.0800, a position worth about 108,000 dollars, using the full 30:1.

A surprise data release moves EUR/USD down 1.5% within minutes, to about 1.0638.
The position loses about 1,620 dollars, 45% of the account.
If the fall continues, the broker closes the position once margin drops to half the requirement.

With a micro lot instead, the same move would have cost about 16 dollars, less than half a percent of the account.

Common mistakes

Using maximum leverage by default. It is a ceiling, not a recommendation.
Thinking small moves are harmless. Leverage multiplies them.
Trading around data releases at full leverage. Moves and slippage are largest then.
Assuming losses stop at the deposit everywhere. Only certain rules give that floor.

The takeaway

Currency moves are small, so forex is traded with leverage. That turns a 1% move into a 30% account swing at 30:1. EU limits cap retail leverage.

Check yourself

Quick quiz

4 questions. Instant feedback, nothing is saved.

1Tap the leverage at which a 1% move costs 30% of your deposit.

Tap the chart.

At 30:1, the position is 30 times the deposit, so a 1% move equals 30% of the deposit.
2You open 100,000 EUR/USD at 30:1. Roughly how much margin is needed, at EUR/USD 1.08?

The position is worth about 108,000 dollars. One thirtieth of that is about 3,600.
3What is the maximum leverage for retail CFDs on major currency pairs under the EU rules?

ESMA set 30:1 for majors and 20:1 for other pairs, later made permanent by national regulators.
4What does the SEC warn about leveraged forex losses?

Outside protections such as EU negative balance protection, losses can exceed the deposit.

of 4 correct.