Leverage: How It Really Works

Leverage lets you control a position larger than your capital. Brokers advertise it as opportunity. Mechanically it is a multiplier applied to outcomes in both directions, and it compresses the margin for error.

The basic mechanics

With 1,000 and 10:1 leverage you can control 10,000. A 1% move in the underlying becomes a 10% move on your capital. A 10% adverse move wipes you out entirely.

Nothing about your probability of being right has changed. Only the consequences have.

Available versus used leverage

This distinction saves accounts. A broker offering 500:1 is not requiring you to use it. If you hold 10,000 and take a 20,000 position, you are using 2:1 regardless of what is available.

Available leverage is a limit. Used leverage is a decision.

High available leverage is dangerous mainly because it permits position sizes that no sensible risk framework would allow.

Margin calls and the sequencing problem

When losses reduce your equity below the maintenance requirement, positions are closed automatically — usually at the worst moment, during a fast move with poor liquidity.

The critical point is that liquidation is path-dependent. A position that would have recovered fully can still destroy your account if it moves far enough against you first. Being ultimately right is worth nothing if you were closed out on the way.

Leverage shortens your survival horizon

Consider a strategy with genuine positive expectancy that experiences normal variance. At low leverage, a run of losses is uncomfortable and survivable. At high leverage, the same run ends the account before the expectancy has a chance to express itself.

This is the essential danger: leverage does not make a good strategy bad, but it can make a good strategy fatal, by removing the time needed for the edge to work.

Reasonable practice

• Determine position size from risk per trade and stop distance, then check what leverage that implies — not the reverse.
• Account for the fact that overnight and weekend gaps can exceed your stop.
• Remember that leveraged positions usually carry financing costs, which accumulate on longer holds.
• Treat correlated positions as one position for leverage purposes, because in a stress event they will behave as one.

Educational content only. Not financial advice. Leveraged trading carries a high risk of rapid loss.