Leverage and Margin Explained
Leverage is the reason forex can be so profitable and so dangerous. Here is exactly how leverage and margin work, with worked examples, and how to use them without blowing up your account.
Leverage is the most misunderstood idea in trading, and the one that ends most beginner accounts. Used carefully it lets a small amount of capital work harder. Used carelessly it wipes you out in a single move. Understanding it properly is not optional.
What is leverage?
Leverage lets you control a large position with a small deposit. Expressed as a ratio such as 1:30, it means every 1 unit of your money controls 30 units in the market. So a 1,000 US dollar deposit at 1:30 controls a 30,000 US dollar position.
What is margin?
Margin is the flip side of leverage: the amount of your own money the broker sets aside to open a leveraged position. At 1:30 leverage, the margin requirement is about 3.3 percent of the position size. Margin is not a fee; it is a good-faith deposit that is returned when you close the trade.
A worked example
Suppose you open a 30,000 US dollar position on EUR/USD at 1:30 leverage. The margin tied up is roughly 1,000 US dollars. If the price moves 1 percent in your favour, you make about 300 US dollars, a 30 percent return on your margin. But a 1 percent move against you loses 300 US dollars just as fast. Leverage magnifies both directions equally.
Margin calls and stop-outs
If losing trades eat into your margin, the broker issues a margin call warning you to add funds or close positions. If your equity keeps falling, the broker automatically closes trades at the stop-out level to stop your balance going negative. This is why over-leveraging is so dangerous: a small adverse move can trigger forced closures.
Leverage limits by regulator
Because leverage is so risky for retail traders, regulators cap it. The FCA, ASIC and ESMA limit retail leverage to 1:30 on major currency pairs, with lower caps on volatile assets. Offshore entities may offer far higher leverage, but with weaker protection.
How to use leverage sensibly
- Just because high leverage is available does not mean you should use it all.
- Risk only a small percentage of your account on any single trade.
- Always use a stop-loss so one bad trade cannot cause a margin call.
- Size your position based on risk, not on the maximum the broker allows.
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This guide is for educational purposes only and is not financial advice. Trading forex and CFDs carries a high level of risk and can result in the loss of all your capital. Most retail investor accounts lose money. Make sure you understand the risks and seek independent advice if needed before trading.