Margin and Leverage in Forex Explained

Leverageis the ratio between the market exposure a position controls and the collateral the account must put up for it. At 1:100, every unit of your money can control one hundred units of currency; at 1:30, thirty. The broker effectively lends the difference for as long as the position is open — nothing is deposited into the account, and nothing about the market changes.

The account leverage is set when the account is opened and can differ by broker, account type and instrument. A higher ratio does not make any individual trade move differently — it only changes how much collateral each position consumes.

For forex symbols, MetaTrader computes the collateral per position from the position size and the account leverage:

The result is in the pair’s base currencyand is converted to the account currency at the current rate — that converted figure is what the MetaTrader Trade tab shows in its Margin column. Some instrument types (indices, metals, crypto CFDs) use different margin formulas or fixed margin rates, so the contract specifications of each symbol are the authoritative reference.

The same position at 1:30 would lock about $3,617; at 1:500, about $217. In every case the exposure is identical — 100,000 euros, roughly $10 per pip — only the collateral requirement changes.

Three account figures determine how much room a position has. Equityis the balance plus the floating profit or loss of open positions — the live value of the account (the difference is covered in the equity vs balance guide). Used margin is the total collateral locked across all open positions. Free margin is what is left: equity minus used margin.

In the example above, equity is $10,000 against $1,085 of used margin — a margin level of roughly 922%. The healthier this percentage, the further floating losses can run before the broker intervenes. As losses grow, equity falls while used margin stays put, so margin level drops.

Brokers define two thresholds on margin level, published in their contract terms. The exact numbers are broker-specific, so the values below are illustrative, not universal:

A common misreading is that high leverage makes prices move harder against you. It does not: the market has no idea what your account leverage is. The same 1-lot EUR/USD position produces the same profit and the same loss at any leverage setting:

What leverage changes is capacity. At 1:500, the $10,000 account from the example could in principle open dozens of lots, and a position that large turns ordinary market noise into account-threatening swings. Leverage amplifies outcomes only through the position sizes it makes possible.

The practical danger is the combination: high leverage frees margin, freed margin permits size, and size raises the cost of every pip. The distance an adverse move can travel before a stop out shrinks quickly as volume grows:

At 20 lots, a routine 40-pip fluctuation — common within a single session on EUR/USD — is enough to trigger forced liquidation. This is why position sizing, not the leverage setting itself, is the variable worth controlling; the free Position Size Calculator and Lot Size Calculator turn a chosen risk amount into a volume. Reviewing the margin usage of your own open positions over time also shows how close your trading habitually runs to the limits.

Maximum retail leverage is a regulated number in much of the world. In the EU, ESMA’s product intervention measures cap retail CFD leverage at 1:30 for major currency pairs, with lower limits for other asset classes; the UK and Australia apply comparable caps, while some jurisdictions permit much higher ratios. Brokers may also set stricter limits of their own — for larger accounts, around major news events or over weekends.

None of this changes the mechanics above. Whatever the cap, required margin, free margin and margin level follow the same formulas — and the survival math of size against equity stays exactly as unforgiving.