TA School

Gaps and Windows

Master the dynamics of market gaps: understand how overnight news and volume create price windows, and learn how to trade breakaway, common, and exhaustion gaps.

intermediate level10 min read

Interactive Model

Interactive Visual Walkthrough

Gap Market Behavior

Step 1 of 7
GAP WINDOW BOUNDARY (PREVIOUS CLOSE)Gap Up Window Created
Normal Trading

Price trades normally in a tight range, closing the day at a baseline price level of 100.

Why it matters: Establishing the previous day's close sets the reference point for calculating the gap's physical size.

Introduction

In Japanese candlestickCandlestickA method of displaying financial price data that shows the open, high, low, and closing prices of a security for a specific time period.Read full glossary entry → charting, gaps are referred to as kū (voids) or windows. A price gapGapAn area on a chart where no trading activity took place, visible as an empty space between two consecutive candles.Read full glossary entry → occurs when an asset opens significantly higher or lower than its previous close, leaving a blank space on the chart where no trading activity occurred. Gaps represent sudden, intense shifts in market sentiment, usually triggered by overnight news, earnings releases, or macroeconomic reports.

Why It Matters

  • Reveals Supply/Demand Imbalances: Identifies major overnight interest changes that cannot be hidden by intraday market makers.
  • Acts as SupportSupportA price level where buying pressure is strong enough to prevent the price from falling further. It represents a "floor" on the chart.Read full glossary entry →/ResistanceResistanceA price level where selling pressure is strong enough to prevent the price from rising further. It represents a "ceiling" on the chart.Read full glossary entry →: The borders of the gapGapAn area on a chart where no trading activity took place, visible as an empty space between two consecutive candles.Read full glossary entry → (specifically the previous close) serve as strong psychological zones where order flow pivots.
  • Identifies TrendTrendThe general direction in which a security or market is moving over time.Read full glossary entry → Phases: Categorizing gaps helps determine if a trendTrendThe general direction in which a security or market is moving over time.Read full glossary entry → is starting (breakaway), accelerating (runaway), or ending (exhaustion).
  • Triggers High-Velocity Moves: Gaps attract momentum traders who drive rapid price expansion as they chase breakouts or trade the fill.

Types of Gaps

Traders classify gaps into four major categories based on their location within the trend:

  Trend Phase          Gap Type          Typical Behavior
  ─────────────────────────────────────────────────────────────────────────────
  Trading Range        Common Gap        Filled quickly; low volume; sideways noise.
  
  Trend Inception      Breakaway Gap     Breaks range boundaries on high volume; rarely filled.
  
  Trend Mid-Point      Runaway Gap       Accelerates the trend on moderate volume; acts as support.
  
  Trend Terminal       Exhaustion Gap    Parabolic price spike; high volume; followed by reversal.

Trading Applications: The Gap Fill Play

A common strategy is Trading the Gap Fill (often called "fading the gap"):

  1. Identify a Common Gap: A gap up occurs inside a known trading range with average or low volumeVolumeThe total number of shares, contracts, or units of a security traded during a specified time period.Read full glossary entry →.
  2. Wait for Reversal Trigger: Watch the lower-timeframe (e.g., 5-minute) chart. Wait for a bearish candle structure (such as a shooting star) at the open.
  3. Execute the Fade: Sell short with a stop-loss above the high of the day's opening candle.
  4. Target the Close: Set your profit target at the previous day's close (the bottom of the gap window).

[!CAUTION] Never attempt to fade a breakaway gap! If price breaks out of a major range on massive volumeVolumeThe total number of shares, contracts, or units of a security traded during a specified time period.Read full glossary entry →, trading against it is highly dangerous as the price is likely to continue moving in the breakoutBreakoutA price movement through an established support or resistance level. A breakout is often accompanied by increased volume, signaling strong momentum.Read full glossary entry → direction without filling.

Common Mistakes

[!WARNING]

  • Blindly Fading All Gaps: Assuming every gap must fill immediately. While many common gaps fill, breakaway and runaway gaps can go weeks or months without filling, causing massive losses for counters.
  • Ignoring Volume: Fading a gap that occurred on massive volume. High volume indicates strong institutional participation; do not stand in their way.
  • Chasing Exhaustion Gaps: Buying the final parabolic gap up out of FOMOFOMOAn acronym for Fear Of Missing Out, which drives traders to enter trades impulsively due to anxiety about missing a price move.Read full glossary entry →. This is usually when smart money is distributing shares to late retail buyers.

Key Takeaways

  • •A gap occurs when the market opens at a price level significantly higher or lower than the previous day's close, leaving an empty space (window) on the chart.
  • •Common gaps occur within a trading range and are typically filled (price returns to close the gap) quickly.
  • •Breakaway gaps signal the start of a strong new trend, breaking out of consolidation on high volume, and are rarely filled immediately.
  • •Exhaustion gaps occur near the end of a rapid trend, signaling panic or euphoria before a sharp reversal.
  • •Gap fills represent support or resistance levels where buyers or sellers look to defend the previous close.
Knowledge CheckQuestion 1 of 5

What causes a price gap to form on a chart?

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