Weekend Gap: The Sunday Open Move Every Forex Trader Should Plan For
Macro Glossary, Forex Mechanics
By Ken Chigbo, macro trader and founder of KenMacro, 18+ years in markets.
Updated 2026-05-20
The desk’s answer
A weekend gap is the difference between Friday’s close and Sunday’s open on a forex pair, gold, or indices CFD. The forex market is closed Saturday and Sunday (Friday 22:00 UTC to Sunday 22:00 UTC), and any news or event during that window is priced instantly at the Sunday open. Routine weekend gaps on majors are 5 to 20 pips; major surprises (intervention, geopolitical events, election shocks) can gap 50 to 200 pips. Gaps tend to fill (price returns to the Friday close) more often than they extend, but the conditional probability depends heavily on the catalyst.
Defined term, Weekend gap
A weekend gap is the difference between the Friday close and the Sunday open price in forex, gold and indices CFDs. The market is closed from Friday 22:00 UTC to Sunday 22:00 UTC, so any news or geopolitical event in that window is priced instantly at the Sunday open, often creating a visible gap on the chart that closes (or fails to close) over the following sessions.
Why weekend gaps form
The forex spot market is closed Saturday and Sunday because the major interbank participants (Tier-1 banks, central banks, prime brokers) close for the weekend. News breaking during this window cannot be priced until liquidity returns at the Sunday open. Two categories of catalyst dominate: scheduled weekend events (G7/G20 communiques, OPEC announcements held outside trading hours) and unscheduled developments (geopolitical escalations, surprise central bank statements, political shocks). The pair that gaps most reliably depends on the catalyst: yen crosses on BoJ-related news, gold on geopolitical risk, indices CFDs on US futures-driven moves.
Gap-fill probability
Empirically, weekend gaps on majors close within the first week roughly 65 to 75 percent of the time, but this aggregate hides huge conditional variance. A 10-pip gap with no specific catalyst is a near-coin-flip to fill within a session. A 60-pip gap driven by a real news shock (intervention, election result) often does not fill for weeks or ever, because the catalyst has genuinely reset the price. The fade-the-gap trade works on noise but fails on news, and the trader who cannot reliably distinguish the two should not be running the fade systematically.
Trading the Sunday open responsibly
Three rules. First, avoid carrying oversized positions over the weekend; weekend gaps are the most concentrated gap risk in forex. Second, do not place new positions at the Sunday open within the first 30 to 60 minutes; spreads are widest then and the gap can be on its way to closing or extending, with very little liquidity to confirm the direction. Third, size any deliberate Sunday-open position so that a 2x the typical gap outcome remains within risk tolerance. Sunday-open spreads on competitive brokers run 3 to 5 times the London-NY overlap norm; allow for this in the all-in cost.
Frequently asked
What is a weekend gap in forex?
The difference between Friday’s close and Sunday’s open on a forex pair, gold or indices CFD. It occurs because the forex market is closed from Friday 22:00 UTC to Sunday 22:00 UTC, and any news during the window is priced instantly at the Sunday open.
Do weekend gaps usually fill?
Empirically yes, around 65 to 75 percent of weekend gaps on majors close within the following week. But the conditional variance is enormous: noise gaps fill quickly, news-driven gaps often do not fill for weeks or ever. The fade-the-gap trade works on noise and fails on news.
Should I hold positions over the weekend?
Only at sizing that absorbs a 2x the typical weekend gap outcome within risk tolerance. Weekend gaps are the most concentrated gap risk in retail forex, and the Sunday open is the lowest-liquidity, widest-spread window of the week. For most retail strategies the discipline is to flatten by Friday close.
What this means at the desk
Sunday opens are wide and thin. Plan around them, do not trade into them.
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