Leverage and margin: how accounts really blow up

More new traders lose money to leverage than to any single broker trick, and usually without fully understanding the mechanism. Leverage lets you control a position far larger than your deposit. It multiplies gains, but it multiplies losses in exactly the same proportion — and it is the losses that end accounts. Understanding it properly is the difference between a tool and a trap.

What leverage actually does

At 100:1 leverage, a 1% move against a fully-committed position wipes out your entire margin. The market does not need to do anything unusual — ordinary daily volatility is enough. The headline "up to 500:1" that brokers advertise is not a benefit to chase; it is the maximum rope available, and how much of it you take is your decision, not theirs.

Margin, free margin and the margin call

Your used margin is the deposit locked against open positions; your free margin is what remains to absorb losses. As losses eat into free margin, you approach a margin call, and then a stop-out where the broker automatically closes positions to prevent your balance going negative. Knowing these levels for your account — before you trade — tells you exactly how much adverse movement you can survive.

Position size is the real control

The practical lever you control is not the account leverage setting but your position size relative to your balance. Risking a small, fixed percentage of the account per trade keeps a losing streak survivable; sizing to the maximum the leverage allows means a handful of normal losses can finish you. Professionals obsess over position sizing precisely because it, not prediction, keeps them in the game.

Negative-balance protection

Check whether your broker offers negative-balance protection, which ensures you cannot lose more than you deposited in a fast, gapping market. Where it is offered it is a genuine safeguard; where it is not, an extreme move could in theory leave you owing money. This article is educational and not financial advice — understand the specific margin terms of your own account before trading.