Weekend Gap
A weekend gap is the price difference between the last quoted price on Friday and the first quoted price on Monday in a financial market that closes overnight, most notably in forex and stock indices.
Quick Definition Box
A weekend gap occurs because markets close on Saturday and Sunday, but geopolitical events, economic data, or central bank decisions can still happen. When trading resumes, prices "jump" to a new level, bypassing the Friday close. This gap can trigger stop-loss orders at worse prices than expected, or fill limit orders at better prices than anticipated.
Detailed Explanation
In the forex market, trading runs from Sunday evening (5:00 PM ET) to Friday afternoon (5:00 PM ET). During the weekend, the market is completely closed. However, the world does not stop. Elections, natural disasters, central bank emergency meetings, or major economic releases can occur between Friday's close and Monday's open.
When the market reopens, the first quoted price may be significantly different from Friday's last price. This difference is the weekend gap. For example, if EUR/USD closed at 1.0850 on Friday and opens at 1.0900 on Monday, the gap is 50 pips.
The gap is not a gradual move—it is a single jump. This means that any pending orders placed near the Friday close may be executed at the opening price, not at the requested price. For a stop-loss order, this is usually worse for the trader. For a take-profit order, it can be better.
The size of a weekend gap varies. In major currency pairs like EUR/USD, gaps are typically small—5 to 20 pips—because the market is deep and liquid. In exotic pairs or during major news events, gaps can exceed 100 pips. For example, the Swiss franc gap on January 15, 2015, after the Swiss National Bank removed the EUR/CHF floor, was over 2,000 pips in some venues.
Weekend gaps are also common in stock index CFDs like the US30 or Germany40, where the underlying futures market closes on Friday and reopens on Sunday evening. A major earnings announcement or geopolitical escalation over the weekend can cause a gap of 50 to 200 points.
Real-World Example
Imagine you are trading GBP/USD. On Friday at 4:55 PM ET, the price is 1.2700. You have a sell stop-loss at 1.2750, meaning you expect the price to rise and trigger your loss limit.
Over the weekend, the UK releases unexpectedly strong inflation data. On Monday at 5:00 PM ET, the market opens at 1.2850—a gap of 150 pips above your stop-loss.
Your stop-loss order is triggered at the opening price of 1.2850, not at 1.2750. You lose 150 pips instead of the 50 pips you planned. If you were trading 1 standard lot (100,000 units), this is a loss of $1,500 instead of $500.
Conversely, if you had a buy limit at 1.2650, the gap would skip your order entirely. The price opens at 1.2850, and your limit order is never filled. You miss the move entirely.
Why It Matters for Traders
Weekend gaps affect execution quality. For traders using stop-loss orders, the gap means your risk is not precisely controlled. The actual loss can be larger than your intended stop distance. This is especially relevant for traders who hold positions over the weekend.
For traders using limit orders, gaps can mean missed entries. If your limit is below the Friday close and the market gaps up, your order is not filled. You may need to chase the price or wait for a retracement that never comes.
Gaps also affect margin calculations. If a gap moves against your position, your broker may require additional margin immediately at the open. If you cannot meet the margin call, your position may be closed at a loss.
Traders who use automated strategies or expert advisors (EAs) should be aware that weekend gaps can cause backtesting results to differ from live trading. Most backtesting software assumes continuous prices, but real markets have gaps.
Common Misconceptions
Misconception 1: "Weekend gaps are always filled."
This is false. While some gaps are filled (price returns to Friday's close), many are not. The Swiss franc gap of 2015 was never filled. Relying on gap-fill strategies without confirmation is risky.
Misconception 2: "A stop-loss guarantees my maximum loss."
A stop-loss guarantees execution, not price. In a gap, your stop is filled at the opening price, which can be far from your stop level. This is true for all brokers, regardless of execution model.
Misconception 3: "ECN/STP brokers eliminate weekend gaps."
No broker can eliminate gaps because the underlying market is closed. The gap is a market phenomenon, not a broker artifact. However, the size of the gap can vary slightly between brokers depending on their liquidity providers and how they calculate the opening price.
Related Terms
- ecn — Electronic Communication Network; a type of execution that aggregates prices from multiple liquidity providers.
- stp — Straight Through Processing; a model where orders are passed directly to liquidity providers without a dealing desk.
- market-maker — A broker that takes the opposite side of your trade; may have different gap handling policies.
- no-dealing-desk — A broker model that combines ECN/STP execution, often with no requotes but still subject to market gaps.
How XM Compares
XM operates as a no-dealing-desk (NDD) broker for most account types, meaning orders are routed directly to liquidity providers. This does not eliminate weekend gaps—no broker can. However, XM's execution policy states that stop-loss and take-profit orders are executed at the first available price after the market opens. The actual gap size you experience may depend on the liquidity available at the open. XM also offers negative balance protection for retail clients, which means you cannot lose more than your account balance, even in extreme gap scenarios. For current details on order execution and gap policies, always refer to the official XM website and your account agreement.
Compliance Footer
⚠️ This glossary entry is educational. Forex/CFD trading carries high risk. This is not investment advice.
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