Effective leverage: the leverage you are really using

When a broker advertises “1:30 leverage”, many beginners think they are trading with leverage of 30. In reality, that number is a ceiling. The leverage you actually use depends on the size of your positions compared with your capital. It is called effective leverage, and it decides how fast your account can grow or melt away.

Available leverage and effective leverage

Available leverage is set by your broker and by regulation. In the UK and the EU, FCA and ESMA rules cap retail leverage at 30:1 on major currency pairs, 20:1 on non-major pairs, gold and major indices, 10:1 on other commodities and non-major indices, 5:1 on shares and 2:1 on cryptocurrencies; ASIC applies the same limits in Australia. This leverage only determines the margin your broker holds to open a position.

Effective leverage measures your account's real exposure. You calculate it by dividing the total value of your open positions, their notional value, by your capital.

Worked examples

A 1% move in EUR/USD, about a hundred pips, is nothing unusual over a few days. With 10:1 effective leverage, it swings your account by about 10%. The rule is simple: the change in your account is roughly equal to the change in the market multiplied by your effective leverage.

This third example is the typical beginner scenario: a small account and a position close to the maximum allowed. The slightest adverse move wipes out a large chunk of the capital. The broker closes the position at 50% margin, and negative balance protection only stops you from owing more than you deposited.

Why available leverage is not a target

For the same position size, leverage of 30:1 or 100:1 gives exactly the same gain or the same loss. The only difference is the margin held. Higher available leverage does not make you more profitable: it only lets you open bigger positions, which increases risk.

• Available leverage is room to manoeuvre, useful so you don't tie up too much capital.
• Effective leverage is a risk choice, which should follow from your position size.
• If you size your lots with the 1% rule, your effective leverage usually stays moderate.
• If you choose your lots to “use” your margin, your effective leverage is making the decision for you.

The link with position sizing is direct. Take the $10,000 account and the 1% rule again. With a 25-pip stop, you take 0.40 lots and your effective leverage is about 4.3:1. With a 10-pip stop, the same rule gives you 1 lot and effective leverage of about 10.9:1. The risk at the stop is identical, $100, but a bigger position is more exposed to price gaps and slippage if the stop is hit during a news release. A very tight stop therefore pushes up effective leverage without the risk figure showing it.

Keeping effective leverage reasonable

There is no perfect number, because it all depends on your stop distances. But if your total effective leverage regularly goes above 10:1, take it as a serious warning sign: an ordinary market move can cost you a large share of the account. Keep an eye on your margin level, shown in your platform, to stay well away from margin call thresholds.

Try the exercise on gold, where maximum retail leverage is 20:1 under FCA, ESMA and ASIC rules. With $10,000 and 0.30 lots of XAU/USD at $3,320, or 30 ounces, the notional value reaches $99,600. The broker holds $4,980 of margin, and your effective leverage is about 10:1. A 2% move in the gold price, about $66, swings your account by nearly $2,000.