When spreads widen and why: a session-by-session guide for cost-conscious traders

Your broker’s “typical spread” is an average. In practice, the spread you pay depends heavily on when you trade. This guide maps the cost of a EUR/USD trade across each session, so you can schedule your trading to minimise the invisible cost of timing.

The spread curve: a typical 24-hour cycle

Asian session (00:00–06:00 GMT)

Typical ECN spread: 0.3–0.8 pips.

Tokyo is open, but London and New York are closed. Liquidity is thinner. The EUR/USD spread widens because fewer market participants are quoting prices. For a cost-conscious trader, this is the most expensive “normal” period to trade.

Cost per lot: $3–$8 in spread alone, plus commission. At the wide end, your all-in cost may reach $15+ per lot versus $7.20 during peak hours.

London open (07:00–08:00 GMT)

Typical ECN spread: narrows to 0.1–0.3 pips by 08:00.

Liquidity ramps as London dealers begin quoting. Spreads tighten progressively. By 08:00, pricing is close to the day’s best.

London session (08:00–12:00 GMT)

Typical ECN spread: 0.0–0.2 pips.

Prime trading time for EUR/USD. Liquidity is deep, spreads are tight, and execution quality is at its highest. This is where the published “typical” spread figures are sampled.

London–New York overlap (13:00–16:00 GMT)

Typical ECN spread: 0.0–0.1 pips.

The tightest spreads of the day. Both London and New York are actively quoting, creating maximum liquidity. If you have the flexibility to choose when to trade, this window minimises your cost per lot.

New York afternoon (16:00–21:00 GMT)

Typical ECN spread: 0.1–0.4 pips, widening as London closes.

Still liquid, but thinning. Spreads drift wider as European participants leave. By 20:00 GMT, pricing is closer to Asian-session levels.

Daily rollover (22:00 GMT)

Typical ECN spread: 1–3 pips for 1–3 minutes.

The brief window when swap rates are applied. Liquidity providers step back; spreads spike. Avoid placing orders within 5 minutes of rollover unless you are managing an existing position.

Event-driven widening

High-impact news releases

• Non-Farm Payrolls (first Friday of the month, 13:30 GMT): EUR/USD spreads can hit 3–5+ pips for 30–120 seconds.
• Central bank rate decisions (ECB, Fed, BoE): similar spikes.
• Flash events (e.g., SNB 2015): extreme widening — 50+ pips on some pairs.

If you trade the news, consider a fixed-spread broker where the 0.9-pip quote holds through events. For all other traders, staying out of the market for 2 minutes around a high-impact release avoids the spike.

Sunday market open (22:00 GMT Sunday)

Typical spread: 2–8+ pips for the first 30–60 minutes.

Liquidity is at its weekly low. Gaps are common. Trading in this window carries the highest spread cost of the entire week.

Practical cost optimisation

1. Trade during the London–New York overlap whenever possible.
2. Avoid the first and last 30 minutes of each session (wider spreads during session transitions).
3. Use limit orders to control your fill price — you only execute if the price meets your threshold.
4. Check the economic calendar and avoid market orders within 2 minutes of high-impact releases.
5. Monitor your broker’s live spread in a demo account during your planned trading hours before committing real capital.

The spread is not a fixed cost — it is a variable that you can control by choosing when to trade. Our cost ranking samples spreads during peak hours; your personal cost depends on your session.