Market Structure
Liquidity
The ease with which an instrument can be traded in size without materially moving its price.
What Liquidity means
Liquidity describes how much can be bought or sold at or near the quoted price. In forex it comes from banks, non-bank market makers, funds and brokers posting two-way prices, and it is visible as the size resting on each side of the book. Deep liquidity produces tight spreads, fills close to the quoted price and rapid recovery after a large order. Thin liquidity produces wide spreads, partial fills, requotes and outsized price moves from relatively modest orders.
Liquidity in forex is highly time-dependent rather than constant. It peaks during the London session and the London and New York overlap, thins during the late New York and early Asian hours, and evaporates around the daily rollover, public holidays and the seconds surrounding major scheduled data. Traders should expect their normal cost assumptions to break down in those windows, and should be aware that stop orders placed into thin conditions are the ones most likely to suffer severe slippage.
Worked example
EUR/USD may show 0.2 pips of spread with tens of millions available at top of book during the London and New York overlap, but 1.5 pips and far less depth at 23:00 New York time.
Related terms
- Liquidity ProviderA bank, non-bank market maker or institution that streams two-way prices a broker can fill client orders against.
- SpreadThe difference between the bid and the ask price, and the most common way a forex broker is paid.
- SlippageThe difference between the price a trader expected on an order and the price at which it was actually executed.
- Depth of Market (DOM)A display of the quantity of bids and offers resting at each price level around the current market.
- Trading SessionOne of the regional periods - Sydney, Tokyo, London or New York - into which the continuous 24-hour forex day is divided.
Frequently asked questions
What does Liquidity mean in forex trading?
The ease with which an instrument can be traded in size without materially moving its price.
How does Liquidity work in practice?
Liquidity in forex is highly time-dependent rather than constant. It peaks during the London session and the London and New York overlap, thins during the late New York and early Asian hours, and evaporates around the daily rollover, public holidays and the seconds surrounding major scheduled data. Traders should expect their normal cost assumptions to break down in those windows, and should be aware that stop orders placed into thin conditions are the ones most likely to suffer severe slippage.
What is an example of Liquidity?
EUR/USD may show 0.2 pips of spread with tens of millions available at top of book during the London and New York overlap, but 1.5 pips and far less depth at 23:00 New York time.
Trade with a regulated broker
Understanding the terminology is the cheap part. The expensive part is choosing a counterparty whose execution, financing and withdrawal behaviour match what the marketing implies. Every broker below has been reviewed with a funded live account, and each review states which legal entity and which regulator applies to the account you would actually open.
Check the licence on the regulator's own register before you deposit — our regulators directory explains what each authority enforces, from leverage caps to compensation limits.