Leverage and margin
Lesson 20 · practical guide
Leverage controls more market exposure than the cash posted as margin. It magnifies gains and losses, increases liquidation risk and may add funding costs. Buying power is not affordable risk.
What you will learn
See how margin and leverage can magnify both gains and losses.
Key terms
- Margin — collateral required to open or maintain a leveraged position.
- Leverage — controlling a larger exposure with less capital.
- Liquidation — forced closing when collateral is no longer sufficient.
Follow these steps
- Calculate exposure, not only the cash deposited.
- Model a small adverse move, a gap, fees and a liquidation threshold.
- Set a maximum loss before opening and keep unused capital available.
- Avoid leverage until you can explain the product, funding, liquidation and counterparty rules.
Practical advice
If €100 controls €1,000, a 10% move against the position can consume the €100 before fees. Leverage changes the path to loss; it does not make a weak idea safer.
Long-form explainer
The full guide
Read this lesson as a chapter: understand the mechanism, test the assumptions and apply the idea with a clear risk limit.
Leverage changes the scale of the outcome
Margin is collateral supporting a position. Leverage lets the position's notional value exceed the capital committed, so a small price move can create a large percentage change in the margin. Liquidation occurs when the platform closes a position because the remaining collateral no longer meets its requirements.
The calculation depends on the product, maintenance margin, fees, funding, collateral type and platform rules. A simple leverage ratio hides these details. Losses can arrive faster than a trader can respond, especially when liquidity is thin or markets gap.
Use a risk-first calculation
Start with the maximum loss you can accept, then determine whether the product and position size can keep that loss tolerable after slippage and fees. Do not choose leverage because it increases the amount visible on screen. If the position would require a perfect exit to avoid liquidation, the position is too large.
Read the liquidation and margin documentation before opening a leveraged product. Know whether collateral can be shared across positions, how funding is charged and what happens during an outage. For beginners, learning the mechanics in a simulator or with unleveraged exposure may be the safer educational route.
What usually goes wrong
Beginners think of leverage as buying power rather than as a change in how quickly a position can be closed against them. The first mistake follows from that: sizing by what the account permits instead of by what a normal adverse move would cost. The second is ignoring the path. A position can be liquidated by a move that reverses an hour later, so being right about direction is worthless if the position does not survive the route.
People also forget the ongoing costs. Funding or financing charges accrue while the position is open, and a position held for weeks can lose money to carry even when the price barely moves. The last mistake is assuming a stop protects the calculation. In a gap, an outage or a fast market, the exit can happen well beyond the level you chose, and some products can take more than the margin posted. Work out the loss from a bad-day move rather than a typical one, and size so that the bad day is survivable rather than merely unlikely.
How it works
If you post €100 and control €1,000, a 1% move changes the position by about €10 before costs, or 10% of margin. A move against you can trigger a margin call or liquidation before you can react.
Read maintenance margin, liquidation, fees and funding rules. Cross margin can expose more of an account; isolated margin limits assigned collateral but is not safe by itself.
Worked example
Numbers make an idea concrete. Here is a small, illustrative one — not a forecast.
A €1,000 position on €100 margin loses €20 after a 2% adverse move, reducing margin by 20% before fees. Gaps and thin liquidity can worsen it.
Before you act
Run through these questions before you commit any money or make a decision based on this lesson:
- What is my exposure, not deposit?
- Where is liquidation?
- What funding and interest apply?
- Can other positions be affected?
Practice this lesson
Reading is a start; doing the exercise is what makes the idea stick.
Calculate the cash impact of 1%, 3% and 10% moves. Choose a simulated exposure that does not require a price rebound.
Further reading
Educational content only: This guide is not personal financial, legal or tax advice. Markets involve risk, including the possible loss of capital. Verify current rules, fees and product availability in your country.