What Is OTC Forex Trading?

What is OTC forex trading?

OTC forex trading is any currency trade agreed directly between two parties rather than on a formal exchange. When you buy EUR/USD through a retail broker, there is no central venue where your order meets everyone else’s. The trade is a private contract between you and your broker, or between your broker and the liquidity providers behind it.

The market behind that contract is enormous. Global foreign exchange turnover averaged US$9.6 trillion a day in April 2025, according to the BIS Triennial Central Bank Survey. Trading is spread across financial centres rather than one venue: the UK handles about 38% of global FX turnover, the US about 19%, Singapore 11.8%, and Hong Kong 7.0%, and those four centres together account for about 75%. For you, this means the market runs 24 hours a day, five days a week, as one centre hands over to the next, and no single exchange sets the price you see. Instead, prices come from a decentralised network of dealers, mainly banks and other liquidity providers, with no central clearing house standing between the two sides of your trade.

How Dealing Works in OTC Forex

When you click buy, you are not sending an order into a public marketplace. Your broker quotes the price, and the trade sits between you and the broker or its liquidity providers. With an OTC forex broker you usually see a single buy price and a single sell price, quoted by your broker. On an exchange you would see an order book with many buy and sell prices from different participants. That single quote is the clearest everyday sign that you are trading over the counter.

Dealing Desk Brokers (Market Makers)

A dealing desk broker, also called a market maker, is the counterparty to your trade. It sets its own bid and ask, usually matched to interbank prices, and earns the spread between them. It can fill your order from its own book, match it against an opposite order from another client, or pass it to a third-party liquidity provider to hedge, and you do not see which of the three happened.

Because the dealing desk takes the other side, it profits when a client loses, and these brokers are sometimes called B-book brokers. Dealing desks use their own liquidity to make fixed spreads practical and to fill small trade sizes, because wholesale liquidity providers do not offer fixed spreads and do not find small positions cost-effective. If you are starting out with small positions, or you want to know your spread before you trade, this model is often where you land. We cover how the model works in more depth in our explainer on how a market maker works.

No Dealing Desk Brokers (ECN and STP)

A no dealing desk broker passes your order to liquidity providers using execution methods such as ECN (electronic communication network), STP (straight-through processing), and DMA (direct market access). You are not trading against the broker’s own book, so the broker’s quote reflects the prices its providers send through rather than a price the broker itself set.

The practical difference shows up in pricing. To illustrate the two models, take the advertised figures at one broker, Pepperstone: an average EUR/USD spread of 0.1 pips on its raw account plus a commission of US$7 per 100,000 units round turn, and an average 1.1 pips with no commission on its standard account. The raw account shows the spread and the commission separately, while the standard account builds the broker’s charge into a wider spread, so the two accounts price the same pair in two different ways. This is an illustration only, not a recommendation, and these are the broker’s advertised figures rather than anything we measured. My advice is simply to compare total cost per trade, spread plus any commission, rather than the headline spread alone.

OTC Forex vs Exchange Trading

The clearest way to see what “over the counter” means is to put it beside the alternative. A currency futures contract is standardised and traded on a regulated futures exchange, where a clearing house stands between buyers and sellers. A retail forex contract is an OTC contract with a dealer, your broker, as your counterparty. CFDs on shares and on other asset classes are also usually traded OTC with the broker, so much of what follows applies to them too.

What does this difference mean for you? In my view, the two things worth remembering are price transparency and counterparty risk. You cannot see an order book, so you accept your broker’s quote as the market price, and the entity on the other side of your trade is a dealer rather than a clearing house. Both of these mean the broker you choose matters more than it would on an exchange.

Risks of Trading Forex Over the Counter

The main risks of OTC trading are counterparty risk, less price transparency, and a conflict of interest when a dealing desk broker takes the other side of your trade. Counterparty risk is the risk that the broker or dealer on the other side could fail, leaving your position and your balance in question. Less transparency means you may not know who is on the other side of your trade and cannot see an order book to check the price against. The conflict of interest is the B-book issue above: a dealing desk profits when you lose.

Regulation is the main protection against these risks. Regulators set rules for how brokers behave, and trading with a licensed broker can protect you against fraud, theft, and misuse of your funds. A regulated broker keeps client money segregated from its own. The rules themselves differ by country: retail leverage caps, for example, are 30:1 on major currency pairs under CySEC in the EU and under ASIC in Australia, and 50:1 on major pairs in the US. Leverage magnifies losses as well as gains, which is why we treat it as its own topic in our explainer on leverage.

If you read only one thing before choosing a broker, I would check the licence first. You can verify a broker’s licence on the regulator’s own register, and it costs you nothing to look.

Where to Go Next

The choice from here is about how you want your orders handled. If you prefer a broker that fills from its own book and quotes fixed or all-in spreads, see our comparison of market maker forex brokers. If you want raw spreads plus commission, see our comparison of ECN brokers. To compare every broker we rate side by side, start with our full forex broker comparison, ordered by our overall rating.