How easily you can buy or sell an asset without moving its price — high liquidity means tight spreads and instant fills.
Liquidity is the depth of buyers and sellers waiting at every price level. A liquid market has thousands of orders stacked at every level, so you can buy or sell big size without pushing the price. An illiquid market has thin order books — your order itself moves the market.
Forex is the most liquid market in the world. EUR/USD trades $6+ trillion a day, which means you can place a 10-lot order during London and barely move price. Compare that to a small-cap stock where a 10,000-share order might move price 2%.
Liquidity changes by the hour. Forex peaks during the London-New York overlap (8am-12pm NY) and bottoms during the Asian afternoon. The same pair can have a 0.5-pip spread at 9am NY and a 3-pip spread at 4am NY.
Real trade example
EUR/USD's average spread during the Aug 2024 summer doldrums was 0.7 pips. The same week's spread during the Asian session midweek averaged 1.4 pips — double, for the same pair, just because of liquidity drying up.
Frequently asked about liquidity
What is a liquidity in trading?+
How easily you can buy or sell an asset without moving its price — high liquidity means tight spreads and instant fills.
When will I see liquidity used in real trading?+
Every spread quote is a liquidity reading. Tight = liquid, wide = illiquid.
What is the most common mistake traders make with liquidity?+
Trading during low-liquidity sessions because "the chart is calmer." Calm and thin are not the same. Thin markets fake out and slip — calm markets just consolidate.
What do experienced traders know about liquidity that beginners don't?+
Trade only during the London-New York overlap (8am-12pm NY) for the first year. Liquidity is at its peak, spreads are at their tightest, and the trends are strongest. It's the easy mode of forex.