Leverage: controlling a big position with a small amount of capital

When you open one lot on EUR/USD, you take a position worth 100,000 euros. Very few retail traders have that much in their trading account, yet they place these orders every day. What makes it possible is leverage: your broker lets you control a large exposure while locking up only a small fraction of its value.

It is the most powerful tool a retail trader has, and also the one that wipes out the most accounts. Before we talk about margin, margin calls or costs, you need to understand exactly what leverage does, and above all what it does not do.

What is leverage, exactly?

Leverage is expressed as a ratio: 1:30, 1:100, 1:500. Leverage of 1:30 means that for every euro you set aside, you can put up to 30 euros to work in the market. The money set aside is called margin: it is a deposit, not a purchase price. You do not spend it; it is simply held while the position is open.

The link between these three ideas fits on one line. Remember it, you will use it in every lesson of this level.

The notional value is the real size of your position. A standard lot on EUR/USD is worth 100,000 euros, a mini lot 10,000 euros, a micro lot 1,000 euros. On a pair like EUR/USD, the base currency is the euro, so the notional value is expressed directly in euros.

Example: 1:30 versus 1:500 on the same trade

Take the same order, one lot bought on EUR/USD, at two different brokers. The first is regulated in the UK or the EU and applies the maximum leverage allowed for retail clients on major pairs, which is 1:30. The second is based offshore and offers 1:500.

This is where most beginners get it wrong. They think 1:500 leverage is "riskier" because it makes you win or lose faster. In reality, on one lot, a pip is worth 10 dollars whether you are at 1:30 or 1:500. Leverage does not change your profit per pip. It only changes the maximum position size your account lets you open.

An amplifier that works both ways

Without leverage, if EUR/USD rises 1%, the capital you invested rises 1%. With leverage, that same 1% move is measured against your margin or your equity, both much smaller than your exposure. The result is a magnified move on your account. It feels great when the market goes your way, and it is brutal when it goes against you.

Picture a 5,000-euro account. You buy one lot of EUR/USD at 1.1000. Price drops 100 pips to 1.0900. The market move is tiny, less than 1%. Here is what it does to your account.

Why about 20 times? Because your 100,000-euro exposure is 20 times your 5,000-euro account. And that holds whether your broker offers 1:30 or 1:500: the loss is identical. The only difference is that at 1:500, nothing would have stopped you opening 5 lots instead of one, and losing almost the whole account on that same 100-pip move.

Maximum leverage versus effective leverage

You need to separate two things. Maximum leverage is what your broker allows. Effective leverage is what you actually use. The second number is the one that measures your risk.

• €10,000 account, 0.5 lot EUR/USD open (€50,000): effective leverage of 5:1.
• Same account, 2 lots open (€200,000): effective leverage of 20:1.
• Same account, 3 lots EUR/USD plus 1 lot GBP/USD: add the exposures together and effective leverage climbs above 40:1.

Many experienced traders run modest effective leverage, even when their broker offers far more. They do not size positions according to available margin, but according to how much they are willing to lose if the stop loss is hit. You will learn this method in detail in level 3, which covers risk management.

Work out your margin before every trade

Before opening a position, get into the habit of checking two numbers: the margin it will lock up and the total exposure it adds to your account. If the margin is a large share of your equity, that is usually a sign the position is too big. The calculator below does the maths for you based on the instrument, the size and the leverage.

Good habits with leverage

1. Think in pips and money lost, never in available margin.
2. Recalculate your effective leverage after every new position, especially if you trade several correlated pairs.
3. Do not confuse "I can open 5 lots" with "I should open 5 lots".
4. Keep free margin: an account used at 100% cannot absorb any move against you.
5. A lower maximum leverage is not a handicap: it is a seatbelt someone fitted for you.

Leverage is neither good nor bad. It is a tool that makes trading possible with a small account. Used badly, it turns an ordinary move into a major loss. In the next lesson, you will see what actually happens on your account when a position goes against you: free margin, margin level, margin call and stop out.