What Is Leverage? #
Leverage allows a trader to open a position much larger than the amount of capital they actually have, by borrowing the rest from the broker or exchange.
It is usually expressed as a ratio, such as 1:10, 1:50, or 1:100. A leverage of 1:100 means that with $1,000 of your own capital, you can open a position worth $100,000 — the broker effectively lends you the remaining $99,000 for the duration of the trade.
How Does Leverage Actually Work Behind the Scenes? #
When you open a leveraged position, you are not paying the full value of the asset. Instead, you deposit a small fraction of it, called margin, and the broker allows your position to control an amount many times larger than that margin.
The broker isn’t giving you free money — it is extending you credit, backed by the margin you’ve deposited as collateral. Your profit or loss is still calculated on the full size of the position, not just on your margin. This is exactly what magnifies both gains and losses: a small price move now applies to a much larger position size than your own capital could have opened on its own.
Why Do Brokers Offer Leverage? What’s In It for Them? #
Leverage is not offered out of generosity — it is a core part of how many brokers make money.
- More volume, more commission and spread revenue. Since leverage lets traders open much larger positions than their capital alone would allow, the broker earns commission and spread on the full size of every trade. A trader with $1,000 who opens a $100,000 leveraged position generates the same trading costs (commission, spread) as someone genuinely trading with $100,000 — the broker’s revenue scales with position size, not with the trader’s actual capital.
- More trading activity overall. Leverage makes it possible for smaller accounts to participate meaningfully in markets, which increases the total volume flowing through the broker.
- In some broker models, the broker itself takes the other side of the trade (a “market maker” model), meaning leveraged retail losses can directly become broker revenue. This isn’t true of every broker, but it is a real conflict of interest worth being aware of.
In short: the more leverage a trader uses, the larger their effective trading volume becomes, and the more the broker earns in fees regardless of whether the trader wins or loses.
The Double-Edged Nature of Leverage #
Leverage doesn’t change the percentage move of the underlying asset — it changes how much of that move affects your account.
- If the asset moves 1% in your favor, a 1:100 leveraged position gains roughly 100% relative to your margin.
- If the asset moves 1% against you, that same leverage produces a roughly 100% loss relative to your margin.
This is the core trade-off: leverage doesn’t create profit potential out of nothing, it simply scales up whatever the market does — in both directions, symmetrically.
Advantages of Using Leverage #
- Allows traders to open meaningful position sizes with limited capital
- Frees up remaining capital for other purposes, since the full asset value doesn’t need to be paid upfront
- Makes markets with historically small price movements (like major forex pairs) accessible for meaningful returns
Disadvantages and Risks of Using Leverage #
- Losses are magnified exactly as much as gains
- Small, normal price fluctuations can result in disproportionately large losses relative to the trader’s own capital
- Encourages overtrading and oversized positions relative to actual account size
- Increases the psychological pressure of trading, since account value can swing significantly in short periods
Because leverage means a trader is effectively trading with money that is largely not their own, it introduces a very specific risk: the broker needs a mechanism to protect itself if the trader’s losses start approaching the amount that was lent. This mechanism is called a margin call, and it will be covered in detail in the next lesson.
Conclusion #
Leverage lets traders control position sizes far larger than their own capital by borrowing the difference from the broker, while the broker profits from the increased trading volume through commissions and spreads. It magnifies both profits and losses proportionally, which makes it a powerful but double-edged tool that requires careful risk management.
One-Sentence #
Leverage lets you trade with borrowed capital to control a much larger position, magnifying both gains and losses while generating more commission and spread revenue for the broker.