What leverage actually changes
This is the most misunderstood point: leverage does not multiply your profits. Open the same size at 1:30 or 1:500 and your gain and loss per pip are identical; the only difference is how much of your balance is held as margin. What multiplies profit and loss is position size, not leverage.
Its danger is indirect: by freeing more margin it tempts larger sizes — and that is precisely where risk rises. Full treatment in leverage and margin.
Nominal versus effective
The leverage set on your account is an available ceiling, not a description of what you are doing. Your real exposure is effective leverage: total notional position value divided by equity. Two traders on identical leverage settings can therefore be, respectively, conservative and one move from liquidation.
The formula
Effective leverage = total notional exposure ÷ equity
A worked example
A $2,000 account at 1:100 opens one standard lot of EUR/USD at 1.1000. Notional value is $110,000 and margin held $1,100. Effective leverage = 110,000 ÷ 2,000 = 55:1, even though the account is set to 1:100. Open three lots and it becomes 165:1 with no setting changed.
Common mistakes with this term
- Believing higher leverage means larger profits; it only means less margin held.
- Watching the account's leverage setting instead of effective leverage, which sets real exposure.
- Treating held margin as a loss ceiling; losses follow price, not the reserved amount.