US Leverage, Margin, and Dealers

50:1 / 20:1 caps, OTC counterparties, house rules.

Beginner 5 min read Course 3 of 60

Course 3 of 60 in the forex hub. U.S. dealers can offer you up to 50:1 on the majors, and the NFA's FIFO rule means you can't hedge a pair against itself. Neither one tells you what size to trade.

Leverage Caps on a U.S. Account

U.S. retail forex runs under CFTC rules. Under 17 CFR 5.9 the minimum deposit is 2% of the position's notional on major currency pairs and 5% on everything else. Flip those around and you get the familiar caps: at most 50:1 on the majors and 20:1 on the rest. The NFA decides which currencies count as majors.

Those caps are the most the rules let a dealer offer you. Nobody set them as a sensible size for your account, and I've never treated them as one. Futures handle the same question through exchange margin instead, and the futures course walks through that version.

1. What 50:1 actually means

50:1 is a notional multiplier. With $10,000 in the account, the most you could control on a major pair is $500,000. That sounds generous until you do the other half of the math: a 2% move against $500,000 is $10,000, the whole account.

You don't need a full 2% move to get there. If the deposit falls short of the requirement, the dealer has to collect more or close positions, and that happens well before the balance reaches zero. Use the margin calculator to see how much notional a given deposit carries before you pick a size.

50:1 is a notional multiplier — a 2% adverse move can erase the margin Account $10,000 ×50 Max notional $500,000 2% against you $10,000 margin gone 20:1 on non-majors is the other cap. House rules can be tighter. The slider is not a thesis.

2. 20:1 other pairs

Everything outside the NFA's list of majors gets the 5% deposit, which works out to 20:1. When the two currencies in a pair carry different rates, the pair takes the higher one, so a major paired with a non-major sits at 5%.

On $11,050: 50:1 allows $552,500 of a major pair (11,050 x 50) and 20:1 allows $221,000 of a non-major (11,050 x 20). A 1% risk cap is $110.50 whichever pair you pick.

Notice that the risk cap doesn't move with the pair. The leverage caps say how much notional you could carry, and the $110.50 says how much you're willing to lose. Size from the second number, then check that the position fits under the first. I run it through the risk calculator every time.

3. House rules vs CFTC floor

The federal numbers set the minimum deposit, and a dealer can ask for more. The NFA's Executive Committee can also raise required deposits for a while, and it did so for sterling and the yen in 2016 and 2023.

So the leverage you actually get is the lowest of the federal cap, the NFA requirement and your dealer's own rule on the day. Read the margin section of the account agreement, because the dealer can raise its requirement and the NFA has raised it before.

4. FIFO and the hedging ban

NFA Compliance Rule 2-43(b) says a forex dealer can't carry offsetting positions in a customer account and has to offset them first-in, first-out. In practice you can't be long and short the same pair at once at a U.S. dealer. Sell EUR/USD while you're long it and the order closes your oldest long instead of opening a hedge.

There's one wrinkle. If you ask, the dealer can offset a trade against an older one of the same size, but it still has to use the oldest trade of that size. If you've read somewhere that FIFO no longer applies, check the rule yourself: it's still in the NFA rulebook. Plan your exits knowing that the order of your trades matters.

NFA Rule 2-43(b) still applies: US dealers offset first-in, first-out, so no same-pair hedges Same-pair hedge NFA Rule 2-43(b) Offset oldest first What still binds CFTC leverage caps 50:1 / 20:1 Dealer house rules on top Read the account agreement

5. Notional vs the slider

Most platforms show leverage as a slider or a dropdown. Moving it changes how much margin a position ties up. It doesn't change what a pip is worth or how far away your stop is. On 100,000 EUR/USD a pip is 100,000 times 0.0001, or $10, so a 30-pip stop is 30 times $10, or $300, whether the slider says 10:1 or 50:1.

That's why I ignore the slider when sizing. Pick the stop, work out the lots from the dollars you'll risk, and let the margin fall where it falls. The lesson on pips and lot sizing covers that arithmetic step by step.

6. Mistakes I'd avoid

The ones I see: maxing out 50:1 because the platform allowed it, judging a U.S. account by what an offshore one offers, assuming a same-pair hedge works at a U.S. dealer, and forgetting the dealer writes its own margin rules and can change them.

Next up is the lesson on trading sessions. The hours you trade change how much room your margin needs, so it's the natural follow-on.

Who your dealer is

In U.S. retail forex the dealer usually isn't passing your order to an exchange. It's typically the counterparty on your trade, regulated by the CFTC and the NFA. That's why the account agreement matters so much: margin, liquidation and order handling are the dealer's rules on top of the federal ones.

If a firm offering you forex doesn't show up on NFA BASIC, the NFA's public lookup, that's the end of the conversation. I'd do that check before reading anything else on their website.

Picking a leverage setting

  • 50:1 on majors and 20:1 on the rest is the federal ceiling, and your dealer can set it lower.
  • Size from the dollars you'll lose and the stop in pips, then check the margin.
  • No same-pair hedges at a U.S. dealer: trades offset first-in, first-out.
  • Look the dealer up on NFA BASIC before you fund the account.

Most of the time the right setting is whatever falls out of a small position sized properly. Educational only. Not a recommendation to buy, sell, or hold any contract or pair.