Price Gap
Market Structure & Participants
A price gap is a sudden jump between one price and the next with no trading in between, common at market opens or around major news.
What is a price gap?
A price gap occurs when an instrument’s price jumps from one level directly to another without any trading taking place at the prices in between. Instead of a smooth, continuous move, the chart shows a visible “gap” or empty space between the previous close (or last traded price) and the next price at which trading resumes.
Gaps happen because the flow of orders is interrupted or overwhelmed — most often by the market being closed, or by a surge of orders arriving faster than the available liquidity can absorb smoothly.
When and why gaps occur
- Weekend gaps: forex markets close for the weekend, but news and events don’t stop. If something significant happens between the Friday close and Sunday open, price can reopen well away from where it closed.
- News and data releases: major surprises — an unexpected central-bank decision, a geopolitical shock, a surprise non-farm payrolls print — can cause price to leap past intervening levels as liquidity temporarily thins and orders rush in.
- Low-liquidity hours: gaps are more common when few liquidity providers are actively quoting, such as around holidays or the very start/end of trading sessions.
Why gaps matter for traders
Gaps are one of the main reasons slippage exists: a stop-loss or take-profit order set at a specific price can end up filled well beyond that level if the market gaps straight through it, since there was no trading at the prices in between for the order to execute at. This is a key reason many traders reduce position size or avoid holding positions over the weekend or through major scheduled news, and why brokers often widen spreads or restrict trading in the minutes around high-impact events.
A worked example
Suppose EUR/USD closes the week at 1.0850. Over the weekend, a major geopolitical development unfolds. When trading resumes Sunday evening, the pair opens at 1.0790 — a 60-pip gap — with no trades having occurred at any price in between. A stop-loss set at 1.0820 would have been filled near 1.0790 instead, a worse price than intended, purely because of the gap. This is exactly the kind of risk that negative balance protection and sensible position sizing exist to help manage.