Leverage and Margin (Without Blowing Up)

Leverage is the feature that makes trading both accessible and dangerous. It lets you control a position far larger than your account balance — put down a small deposit, called margin, and the broker effectively lends you the rest. The catch is simple and unforgiving: leverage magnifies your losses exactly as much as your gains.

A concrete example

With 30:1 leverage, a $1,000 deposit controls a $30,000 position. If that position moves 1% in your favour, you make $300 — a 30% return on your deposit. But if it moves 1% against you, you lose $300, nearly a third of your account, on a move the underlying market barely noticed. The leverage didn't change the market; it changed the size of your exposure to it.

Margin calls

If losses eat into your deposit past a threshold, the broker issues a margin call and may close your positions automatically to protect itself. Getting margin-called means the market made the decision for you — the opposite of controlled trading. Keeping position sizes sane keeps that decision in your hands.

This is also why prop firms — which we review on the site — impose strict drawdown and daily-loss limits. Those rules exist precisely to stop leverage from turning one bad day into a blown account.