Before You Trade · Lesson 3 of 7
Leverage: How Accounts Actually Die
Nobody's account is killed by a bad forecast. It is killed by a normal move, multiplied.
Currencies barely move. A big day for EURUSD is 1% — an amount that would bore a stock trader. So how does anyone lose everything in a market this calm? Leverage: the broker lets you control a position far larger than your deposit. UK-regulated brokers cap retail forex leverage at 30:1; offshore brokers cheerfully offer 500:1.
Walk through what that means with real arithmetic. You have £1,000. At 30:1 you can control £30,000 of currency — a third of a standard lot, roughly £2.60 per pip. Now the market has a perfectly ordinary 60-pip afternoon against you: that is £156, nearly 16% of your account, gone in hours — on a day professional commentary will describe as "quiet". At 500:1 the same £1,000 controls £500,000: about £43 per pip, and that same ordinary 60-pip move is −£2,580 — except you cannot lose £2,580, because you only had £1,000. Your broker's platform automatically closed you out somewhere on the way down. The account survived until an average Tuesday, then didn't.
This is the machine that converts "most traders lose slowly" into "many traders lose everything quickly." Three things make it worse:
Margin close-out happens at the worst price. When losses eat your margin, the platform liquidates you — not at a price you chose, but wherever the market is at that moment. Fast markets can gap straight past it.
Leverage feels free. Nothing hurts when you open the oversized position — the pain is deferred to the first adverse move, and by then it is not a decision anymore.
It monetises impatience. Small accounts feel slow, so beginners lever up to make it "worth it" — precisely inverting what the maths demands of a survivor.
Lose 50% of an account and you must double what is left just to get back to zero progress. This asymmetry is why every durable trader sizes positions so that a losing trade costs 1–2% of the account — at which point leverage becomes a tool (freeing margin) rather than a weapon pointed inward. Our free position size calculator does this arithmetic for you.