Leverage and margin
Leverage lets a small deposit control a large position. It multiplies losses exactly as much as gains.
How it works
With 1:30 leverage, $1,000 of margin controls a $30,000 position. A 1% move in the price is a $300 gain or loss: 30% of your margin.
Margin call and stop-out
If losses eat your free margin, the broker warns you (margin call) and then closes positions automatically (stop-out). The levels are in the broker's terms.
Limits by regulator
Regulators in the UK, EU and Australia cap retail leverage at 1:30 on major pairs and lower on other markets. Offshore entities often offer far more, with fewer protections.
Negative balance protection
Some regulators require that you can't lose more than your account balance. Check whether the entity you sign with offers it.