What influences trading spreads during market activity?

Trading spreads may widen or narrow based on volatility, liquidity, and overall market demand at a given moment. These three factors are constantly interacting throughout the trading day, creating a dynamic environment where spread conditions can change rapidly, sometimes within seconds, in response to shifting market circumstances.

Volatility is one of the most significant drivers of spread fluctuations. During periods of calm, predictable market activity, spreads tend to remain tight as liquidity providers are confident in their pricing. However, when volatility spikes — for example, during major economic data releases, central bank announcements, or unexpected geopolitical events — spreads can widen considerably as market makers adjust their pricing to account for the increased uncertainty and the higher risk of rapid price movements between the time an order is placed and when it is executed.

Liquidity has an equally important influence. When a large number of participants are actively trading, the abundance of buy and sell orders at various price levels keeps spreads narrow and competitive. During low-activity periods — such as late-night sessions, transitions between major trading sessions, or public holidays — reduced participation means fewer orders in the market, which naturally leads to wider spreads. Market demand for a specific instrument also plays a role: heavily traded assets like major forex pairs consistently attract enough interest to maintain tight spreads, while less popular instruments may experience wider spreads due to limited participant activity. Being aware of these influences helps traders anticipate when spread conditions are likely to be favourable and plan their trading activity accordingly to minimise unnecessary costs.