Leverage is often marketed as the thing that makes forex trading accessible with a small account. It's also the single biggest reason small accounts get wiped out fast. Both statements are true at the same time — leverage doesn't change your odds, it changes your speed.
Leverage lets you control a larger position than your account balance alone would allow, by borrowing the difference from your broker. 1:100 leverage means you can open a position 100 times larger than the cash you put up as margin. It does not increase your odds of winning a trade — it only increases the size of whatever move happens next, in dollar terms, in both directions equally.
Margin is the amount of your account balance that gets set aside — "locked" — to open and maintain a leveraged position. It is not a fee, and it is not the amount you can lose; it's collateral. The formula:
Required Margin = (Position Size × Contract Size × Price) ÷ Leverage
1 standard lot of EUR/USD (100,000 units) at a price of 1.1000, with 1:100 leverage:
Margin = (100,000 × 1.1000) ÷ 100 = $1,100
With 1:500 leverage instead, the same position only requires $220 in margin. This is the appeal of leverage — a smaller amount of your own capital controls the same position size. It is also exactly where the risk gets easy to lose track of, because the position's dollar sensitivity to price moves hasn't changed at all — only the cash you had to put up for it did.
Your broker tracks a ratio called margin level, which determines how much room you have before a forced liquidation:
Margin Level = (Equity ÷ Used Margin) × 100%
Most brokers issue a margin call warning around 100% margin level, and force-close (stop out) positions somewhere between 20%–50%, depending on the broker. Once your floating losses shrink your equity enough that this ratio drops too low, your broker will start closing positions automatically to protect itself — regardless of whether you think the market is about to turn back in your favor.
$1,000 account, 1:500 leverage, opens 1 full standard lot of EUR/USD (a position size far too large for a $1,000 account — used deliberately here to show how quickly leverage can create a margin call).
Required margin: (100,000 × 1.1000) ÷ 500 = $220. Remaining free margin: $780.
Pip value at 1 standard lot ≈ $10/pip. A 78-pip adverse move wipes out the entire $780 of free margin — at that point equity has dropped to roughly the used margin amount, margin level approaches 100%, and a margin call warning (or automatic stop-out, depending on the broker) becomes very real.
EUR/USD moves 78 pips inside a single volatile trading session more often than new traders expect — particularly around high-impact news releases (see our News Blackout Checker). This is how a account can go from "fully funded" to "margin call" in a matter of hours on a single oversized position.
This is the part that's genuinely counterintuitive: high leverage by itself doesn't force you to take on more risk. Leverage only determines how much margin a given position size requires — it's the position size relative to your account balance that determines your actual dollar risk per pip. A trader using 1:30 leverage who oversizes their position can blow up an account just as fast as a trader using 1:500 leverage. The leverage number gets blamed because it's the marketing headline; the actual mechanism is uncontrolled position size, which is why position sizing — not leverage selection — is the real lever traders have to manage carefully.
Regulators in the EU, UK, and a number of other jurisdictions cap leverage available to retail clients (often around 1:30 for major forex pairs) specifically because of how easily high leverage lets undercapitalized accounts get wiped out on ordinary, unremarkable market moves. Offshore-regulated brokers frequently offer much higher leverage (1:500, 1:1000, or more) to clients outside those jurisdictions — higher availability doesn't mean higher leverage is advisable for a given account size, only that it's permitted.
Check margin requirements before you trade. See exactly how much margin a position needs, and your margin level, in seconds.
Open the Margin Calculator →