Leverage and Margin: A Practical Guide
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What leverage and margin mean
Leverage allows a trader to open a position larger than the cash they have deposited, by effectively borrowing the rest from a broker. Margin is the portion of the trader's own equity that must be set aside as collateral for that borrowed exposure. The two are directly linked: the higher the leverage, the smaller the margin required for a given position size. This applies whether you're using a forex leverage calculator for a currency pair or working out leverage on a crypto leverage calculator for a leveraged coin position.
The formulas
Leverage = Position Value ÷ Account EquityMargin Required = Position Value ÷ LeverageMaximum Position Value = Account Equity × Leverage
These three formulas describe the same relationship from different angles. Given any two of leverage, equity and position value, the third can always be derived.
Worked example
You have $10,000 in account equity and you open a position worth $50,000 in total.
- Leverage used = $50,000 ÷ $10,000 = 5x
- Margin required at 5x leverage = $50,000 ÷ 5 = $10,000 (all of your equity)
If your broker instead offers 10x leverage and you want to know your maximum position size: Maximum Position = $10,000 × 10 = $100,000. Using the full amount available is rarely advisable — see the risk section below.
Why leverage magnifies risk, not just position size
Leverage does not change the percentage move required in the underlying asset to reach a given dollar loss — it changes how much of your equity that dollar loss represents. A $500 loss on a $10,000 unleveraged position is a 5% account loss. The same $500 loss on a position opened with 10x leverage against $1,000 of equity is a 50% account loss, even though the dollar amount lost and the price move are identical.
This is why leverage is often described as a multiplier on both outcomes: it does not make a trade idea more or less likely to succeed, but it scales the equity impact of however the trade actually performs.
Common mistakes
- Using maximum available leverage by default. The leverage limit offered by a broker is a ceiling, not a target — most experienced traders use a small fraction of what is available.
- Confusing margin with risk. Margin is collateral, not a loss — but a highly leveraged position can lose its entire margin (and trigger a margin call or liquidation) from a relatively small adverse price move.
- Ignoring position sizing when leverage is available. Leverage changes how much exposure a given amount of equity can control — it does not remove the need to size positions according to a defined risk percentage, as covered in the Position Size guide.
Frequently asked questions
What is leverage in trading?
Leverage lets a trader control a position larger than their account equity by borrowing the difference from a broker. It multiplies both potential gains and potential losses relative to the equity actually deposited.
What is margin?
Margin is the amount of a trader's own equity that must be set aside to open and maintain a leveraged position. It is calculated as the position value divided by the leverage used.
Is high leverage dangerous?
High leverage increases how quickly losses can consume an account's equity, since a small adverse price move produces a much larger percentage loss on the equity used. Many experienced traders use only a fraction of the maximum leverage a broker offers.
About the author
SOFTYTOOLS Editorial Team writes and maintains the calculators and guides on this site, focusing on clear, formula-based explanations of trading and investing concepts rather than opinion or speculation.