Leverage lets you control a large position with a small deposit. It magnifies gains and losses equally — which is why it is the single most misunderstood and dangerous tool for new traders.
What leverage and margin mean
Leverage (e.g. 1:100) is the ratio between your position size and the capital required to open it. Margin is the deposit the broker locks to hold the position. At 1:100, a $1,000 margin controls a $100,000 position.
The danger nobody emphasises enough
Leverage does not change how much you should risk — only how much you can. A trader risking 1% per trade behaves identically at 1:30 or 1:500. Blow-ups come from sizing to the leverage limit instead of to a risk plan. High leverage is a rope: useful, or enough to hang yourself.
Margin calls and stop-outs
If losses erode your margin past the broker's threshold, positions are force-closed (a stop-out). Understanding free margin and margin level keeps you from the most avoidable account death: liquidation.
Key takeaways
- Leverage is the ratio of position size to required margin.
- It magnifies gains and losses equally — risk plan, not leverage, sets your size.
- Sizing to the leverage limit instead of a risk rule is how accounts blow up.