Leverage and margin without the common confusion
Understand broker maximum leverage, required margin, effective leverage and why margin is not the same as trade risk.
Maximum leverage and effective leverage are different
A broker offering 100:1 leverage states an available maximum. If your equity is 10,000 and your total notional exposure is 20,000, you are using about 2× effective leverage, not 100×.
Margin is collateral, not a loss limit
With the simple relationship required margin = notional ÷ leverage, 100,000 notional at 100:1 requires about 1,000 margin. A 1% adverse move on that 100,000 exposure can also create roughly 1,000 of market loss, but that is a separate price-risk relationship.
Why high available leverage can become dangerous
It makes large exposure accessible with a small margin deposit. If size is chosen from the available margin ceiling instead of a stop-loss budget, a modest price move can become a large percentage of equity.
Margin level and stop-out
Margin level is commonly interpreted as equity ÷ used margin × 100. Warning and stop-out thresholds, as well as liquidation order, are broker-specific, so a calculated liquidation price is only an estimate.
A better order of operations
Derive size from stop risk first, then check required margin and effective leverage. This keeps market risk and financing capacity as separate decisions.
Last reviewed: 2026-08-31