FX Liquidity

The foreign exchange market is the largest financial market in the world, with average daily turnover of about $7.5 trillion according to the Bank for International Settlements 2022 survey. But that headline hides big differences. EUR/USD during the London morning is extremely liquid; an exotic pair on a holiday afternoon can be thin and expensive. Forex has no central exchange, so liquidity is spread across banks, electronic platforms and brokers. Understanding this structure helps traders know when and where costs are lowest and when risk of sudden gaps is highest. The general concept is in Liquidity.

How the FX market is structured#

Prices are quoted by many participants simultaneously, with no single official price. See OTC Markets and Market Makers and Liquidity Providers.

Turnover by instrument#

According to the 2022 BIS survey, FX swaps made up the largest share of turnover (about half), followed by spot (about 28%), outright forwards and options. Spot is what most retail traders trade; swaps are used mainly for funding and hedging. See FX Swaps and Currency Swaps.

Liquidity by pair#

Figures are typical ranges for retail platforms and vary by broker and conditions. See Currency Pairs: Majors, Minors and Exotics.

Liquidity by time#

• Highest: London morning and the London New York overlap.
• Lower: late New York afternoon and the Asian session for European pairs.
• Thinnest: the hour after the 5 p.m. New York rollover, Sunday open, and major holidays.

See Forex Trading Sessions.

When liquidity disappears#

Liquidity can vanish quickly during shocks, when market makers widen spreads or stop quoting.

Other examples include the January 2015 Swiss franc shock and the January 2019 yen flash crash in early Asian trading, when AUD/JPY fell sharply in minutes. See Central Bank Intervention.

Measuring liquidity#

• Spread: the most visible cost. See Bid-Ask Spread.
• Depth: how much can trade near the best price.
• Resilience: how fast spreads recover after a large trade.
• Market impact: how much your order moves the price. See Market Impact and Measuring Liquidity.

Retail broker considerations#

• Market maker vs agency model: some brokers take the other side; others pass orders to liquidity providers. Execution quality varies.
• Last look: some liquidity providers can reject trades within milliseconds of receiving them, a practice the FX Global Code requires to be disclosed.
• Requotes and slippage increase in fast markets.

Practical tips#

1. Trade liquid pairs during their active sessions.
2. Avoid market orders in thin conditions; use limit orders where possible. See Limit Orders.
3. Size down when trading exotics or holiday markets.
4. Expect wider spreads around news and the daily rollover.
5. Keep stops outside obvious levels where liquidity may be thin.

Frequently asked questions#

How liquid is the forex market?#

It is the most liquid market in the world, averaging about $7.5 trillion a day in 2022, but liquidity varies greatly by pair, time and conditions.

When is forex liquidity lowest?#

Around the 5 p.m. New York rollover, at the Sunday open, during major holidays and in the Asian session for European pairs.

Who provides liquidity in forex?#

Large banks, electronic non bank market makers and, for retail traders, brokers that aggregate prices from these providers or make markets themselves.

Next, learn how future exchange rates are priced in FX Forwards and Forward Points.

Sources#

• Bank for International Settlements, Triennial Central Bank Survey