> ## Documentation Index
> Fetch the complete documentation index at: https://docs.openstrat.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Price Gaps

> Understand the meaning of different gap types and trading strategies

## Overview

A **price gap (Gap)** refers to a “vacuum zone” between two adjacent trading days—
that is, the **day’s high is below the next day’s low (the opposite for an upside gap)**,
so there is simply no trading in the price range in between, and a clear “blank” appears on the candlestick chart.

Why are gaps worth discussing on their own?

* They often imply a **sudden imbalance in sentiment**: buying/selling becomes one-sided
* Many **major trend starts, accelerations, and endings** are accompanied by certain types of gaps
* For traders, gaps are both:

  * Opportunity: ride the trend “with the wind”
  * Risk: overnight gaps can make stop-losses effectively useless

In classic technical analysis, **gaps closely tied to trends** are roughly grouped into three types:

* **Breakaway Gap**
* **Runaway/Measuring Gap**
* **Exhaustion Gap**

This section focuses on clarifying:

1. **Where** each type tends to appear in a trend
2. What kind of **sentiment and capital behavior** it represents
3. How to make trading decisions **in conjunction with trend and volume**

***

## Gap Types

### Breakaway Gap

#### 1. Characteristics and location

A **breakaway gap** typically appears:

> **At the moment a key range or pattern is decisively broken**,
> marking “the old structure is broken and a new trend begins.”

Typical features:

* Where it occurs:

  * At the top/bottom of a long consolidation range
  * Near key support/resistance levels
  * At the breakout point of classic patterns (boxes, triangles, head-and-shoulders top/bottom, etc.)
* Gap size:

  * Usually **larger than normal intraday volatility**
  * Often a “full gap” that **jumps completely beyond the prior day’s high/low**
* Volume:

  * **Significantly higher volume** → consensus forms around the new direction; capital rushes in/out
* Follow-through:

  * Usually **not easily filled quickly** in the short term
  * The gap area tends to become a new **support/resistance band**

Simple intuition:

> Breakaway gap = the market collectively declares:
> “Trading in that prior price zone no longer matters—we’ve moved to a new step.”

#### 2. Sentiment and meaning

* **Upside breakaway gap**:

  * Bulls finally break out of the waiting game and rush in to accumulate
  * Shorts and sidelined money are forced to chase higher or stop out
* **Downside breakaway gap**:

  * Bull confidence collapses; some cut positions and exit
  * New shorts rush in; buying interest drops noticeably

What it means for traders:

* A clear signal of **trend initiation/acceleration**
* The gap’s upper/lower edge can serve as:

  * initial stop-loss/take-profit reference levels
  * a **support/resistance confirmation** zone on later retests

***

### Runaway Gap (Measuring Gap)

A runaway gap is also called a **“runaway gap / measuring gap.”**

#### 1. Location: mid-trend

Unlike breakaway gaps, runaway gaps typically:

* appear **after a trend has already traveled some distance**
* sit **somewhere in the middle of an uptrend/downtrend**

Common scenario:

* A rally has been underway for a while; most participants are bullish, but some remain sidelined
* One day the sidelined crowd loses patience: “Forget the pullback—just buy now!”
* Result:

  * Price **jumps forward again mid-trend**
  * Volume expands, but it’s not necessarily a “milestone” breakout level

#### 2. Features and measuring meaning

Typical features:

* Location: clearly **mid-trend**, not at the start or the end
* Volume: usually **higher**, reflecting “add-on buying with the trend” or “panic exits”
* After the gap: price most often **continues in the trend direction for a while**, rather than filling immediately

The so-called **“measuring”** meaning:

> In some textbooks, a runaway gap is thought to occur near the “midpoint” of a trend,
> so it can be used to **roughly estimate the subsequent price target**.

For example (illustrative only):

* A stock rises from 10 to 16 and forms a runaway gap along the way
* A common rule of thumb:

  * Estimated total move ≈ (move from the start to the gap) × 2
  * If the move from 10 to pre-gap is 4, the total might be around 8
  * So a rough target might be near 18 (a “measuring reference,” not a precise target)

In practice, what matters more:

* After a runaway gap → **higher probability of trend continuation**
* But as runaway gaps keep appearing, be alert to:

  * whether the trend is becoming overstretched
  * whether the next gap could turn into an exhaustion gap

***

### Exhaustion Gap

#### 1. Location: the “final jump” near trend end

An **exhaustion gap** usually appears after a long trend when sentiment is highly extreme:

* Near the end of a long uptrend:

  * bulls make a final frantic buying push
  * the stock “takes off at the open,” forming an upside gap
* Near the end of a long downtrend:

  * panic selling peaks
  * the market opens sharply lower with a downside gap

Typical features:

* Location: **at the end of a trend**
* Volume: often with **extremely high volume** (like a “buying/selling climax”)
* Follow-through:

  * usually **fills quickly**
  * instead of making new highs/lows, price starts ranging or reversing

One-sentence summary:

> Exhaustion gap = the “last breath” of a trend.
> Bulls and bears complete a final major handoff here, and the trend’s energy is used up.

#### 2. Easily confused with runaway gaps

At the moment it appears, it’s **hard to distinguish** whether it’s:

* a **runaway gap** that keeps accelerating
* or an **exhaustion gap** that precedes reversal

You usually need to watch the **next few days**:

* If price **continues to advance steadily** after the gap:

  * more likely a runaway gap
* If price **quickly stalls or reverses**:

  * and the gap is fully filled soon → likely an exhaustion gap

That’s why, in practice, judging a gap’s nature **can’t rely on the gap day alone; you must update the read dynamically with subsequent price action.**

***

## Core Concepts

### 1. A gap = a “price vacuum where no one is willing to transact”

From the definition:

* **Upside gap**:

  * Today’s low > yesterday’s high → the in-between prices are where “no one is willing to sell that cheaply”
* **Downside gap**:

  * Today’s high \< yesterday’s low → the in-between prices are where “no one is willing to buy that expensively”

This implies:

* Market sentiment **shifted violently** across that price zone
* Either buyers are extremely dominant, or sellers are one-sided

### 2. “All gaps must be filled” is a misconception

A common saying is: “Gaps will be filled sooner or later.”

A more accurate view:

* **Common gaps** (small, no major news, occurring in ranges):

  * are very likely to be **filled in the short term**
* **Breakaway gaps & runaway gaps**:

  * often remain unfilled for a long time and may become key support/resistance
* **Exhaustion gaps**:

  * are usually **filled quickly**, often alongside trend reversal

So:

> Don’t assume “fill the gap” the moment you see one—
> the key is to **first identify what type of gap it is**.

### 3. Volume is the “gap decoder”

For the same-looking gap, **different volume can imply very different meanings**:

* **Breakaway gap**:

  * high-volume breakout of a pattern/range → trend initiation signal
* **Runaway gap**:

  * trend-following volume expansion → mid-trend acceleration; continuation is more likely
* **Exhaustion gap**:

  * extreme volume + fading follow-through → trend energy depleted; reversal becomes likely

A simple memory aid:

> “Low-volume gaps are often unreliable; high-volume gaps deserve attention.
> But if volume is *too* extreme and the gap shows up near the end, beware—it may be the final blow.”

### 4. Type = trend position + subsequent behavior

To judge the gap type, focus on three things:

1. **How long has the prior move lasted?**

   * just breaking out of a range → more likely breakaway
   * already moved a long way → could be runaway or exhaustion
2. **Where is it in the trend?**

   * mid-trend → favors runaway
   * near the end → watch for exhaustion
3. **How do the next few candles behave?**

   * continuation and the gap stays unfilled → runaway
   * quick stalling/reversal and gap fills soon → exhaustion

***

## Practical Applications

### Case 1: Breakaway gap + retest confirmation

**Scenario:**

* A stock ranges between 10–12 for months
* One day, positive news hits:

  * it **opens high at 12.8, completely above the box**
  * a high-volume bullish candle closes at 13.5, leaving a clear **breakaway gap**

**Possible strategy idea:**

1. Treat the **gap’s upper edge (near the prior high, e.g., 12)** as a new support zone
2. Don’t blindly go all-in on the gap day
3. Wait for a **1–3 day retest**:

   * if price pulls back toward \~12–12.3, volume dries up, and candles stabilize
   * you can **build a long position in tranches** in that zone
4. A stop-loss can be set such that:

   * if the gap is **fully filled and the close drops back into the range**, the breakout may be false—exit decisively

The core idea:

> Breakaway gap = trend start signal,
> retest without filling the gap = breakout confirmation.

***

### Case 2: Using runaway gaps to gauge trend room

**Scenario (uptrend):**

* An index rises from 3000 to 3400 in a relatively steady move
* One day an **upside runaway gap** appears:

  * it opens directly at 3450
  * rallies throughout the day, closing at 3500
  * volume expands clearly, while the trend remains in the mid-section of a healthy rising channel

**A simple “measuring” approach (illustrative):**

* Move from **start (3000) → pre-gap (3400)** = 400 points
* Rough estimate:

  * the move may continue by **a similar magnitude**
  * an initial target could be around **3800**
* In practice, you can:

  * use the **gap’s lower edge** as a mid-trend support reference on pullbacks
  * as long as price stays above that zone, treat the trend as intact

Of course, this is only an **auxiliary reference**, not a guarantee that price “must” reach it.

***

### Case 3: Taking profits and reversal opportunities after an exhaustion gap

**Scenario (late-stage uptrend):**

* A hot theme stock is pumped from 20 to 50—massive gains
* One day it gaps up to 55 at the open, forming a large gap
* Intraday it spikes to 57, but sells off into the close, finishing at 52
* Volume prints an all-time record, and in the following days:

  * price chops and weakens
  * within a week it returns to **the gap’s lower edge near 50 or even breaks below**

This is likely a **classic exhaustion gap + topping structure**.

**Trade ideas:**

* For longs:

  * seeing **a high-level, huge gap on extreme volume + failure to keep pushing higher**,
    consider **taking profits in tranches**—don’t fantasize about “doubling again”
* For aggressive shorts/hedgers:

  * on rebounds that fail near the gap’s upper edge, try small short positions
  * use the **gap high or the exhaustion day’s high** as a strict stop level

Key logic:

> An exhaustion gap tells you:
> “The last wave that rushed in is often the bagholder flow.”
> There’s no need to fight to be the final baton holder.

***

## Common Questions

### Q1: Will all gaps be “filled”? Can I trade a dedicated “gap fill” strategy?

**No. And it’s not recommended to treat “gap filling” as a standalone strategy.**

A rough framework:

* **Common gaps**:

  * many are filled within days to weeks
* **Breakaway gaps, runaway gaps**:

  * many remain unfilled for a long time and instead become key support/resistance
* **Exhaustion gaps**:

  * are often filled **quickly during reversal**

The problem with “gap fill only” is:

* If you treat a breakaway/runaway gap—which often **should not** fill—as “must fill,”
  you may repeatedly short tops against strong trends, and losses can compound badly

A safer approach:

* First estimate the gap type (trend context, location, volume)
* Consider “gap-fill trades” only when there’s **clear exhaustion + late-stage trend**
* Otherwise, prefer trading with the trend rather than betting “the gap must fill”

***

### Q2: How do I distinguish a runaway gap from an exhaustion gap in real trading?

Honestly: **it’s hard to be 100% sure in real time**—it’s more about probabilities.

You can reference a few dimensions:

1. **Trend position**

   * mid-trend → favors runaway
   * extended multi-session surge/drop with large divergence → exhaustion probability rises
2. **Next 2–3 days’ price action**

   * continuation with the gap staying unfilled → likely runaway
   * quick stalling or reversal with a fast fill → more like exhaustion
3. **Volume structure**

   * runaway gap: expanded but still relatively “healthy” volume
   * exhaustion gap: **record/extreme volume** near the end of a long trend

A practical mindset:

> Treat the first gap as “runaway” by default,
> and once follow-through clearly fails and the gap fills quickly, promptly switch to an “exhaustion” interpretation.
> The key is **fast adaptation**, not insisting on “who was right from the start.”

***

### Q3: The gap is huge and it feels like I “missed it”—is it still suitable to chase?

It depends; you can’t generalize.

A quick type-based view:

* **Breakaway gap**:

  * if it breaks out from a long base/important pattern on higher volume:

    * consider a “breakout + retest” plan:
      don’t chase on the most extreme day; wait for a **low-volume pullback to the gap’s upper edge** to re-enter
* **Runaway gap**:

  * trend-following gaps mid-trend carry higher chasing risk
  * better as a continuation signal for existing positions rather than a cue for new money to chase hard
* **Exhaustion gap**:

  * often not suitable to chase; instead consider:

    * taking profits on longs
    * or waiting for reversal confirmation

A simple practical rule:

> If you chase in and **the gap is quickly filled**, can you stop out without hesitation?
> If not, don’t “FOMO chase” at the most emotional moment.

***

## Summary

* A **price gap** is a “vacuum zone” between trading days, representing a **discontinuous shift** in sentiment and capital force.
* Three key trend-related gap types:

  * **Breakaway gap**: appears at **trend start/range breakout**, often on high volume, hard to fill in the short term—strong signal of a new trend.
  * **Runaway (measuring) gap**: often appears **mid-trend**, suggesting the trend may extend; sometimes used to **roughly estimate targets**.
  * **Exhaustion gap**: common near **trend end**, with extreme volume, often fills quickly—an important warning of possible reversal.
* Key usage rules:

  * Start with **trend context and location**, then use **volume and subsequent candles**—don’t stare at the gap alone
  * Don’t blindly believe “all gaps must fill,” and don’t treat “gap fill” as the only strategy
  * Use gaps to:

    * refine **stop-loss/take-profit placement**
    * identify **trend initiation, mid-trend acceleration, late-stage exhaustion**
    * serve as a key puzzle piece for **multi-tool confluence** (with support/resistance, moving averages, patterns)

Remember:
**A gap itself is not a buy/sell reason—it only tells you a past “sentiment eruption” occurred here.
What ultimately determines P\&L is your overall control of trend, position sizing, and risk.**

***

## Further Reading

* Related resource links

  * Investopedia – *Gap* entry: systematically introduces definitions and features of different gap types (common, breakaway, runaway, exhaustion), helpful for concept organization.
  * StockCharts ChartSchool – *Gaps and Gap Analysis*: explains breakaway, runaway, and exhaustion gaps with plenty of illustrations, suitable for practicing against real candlestick charts.

* Recommended books or articles

  * *Technical Analysis of the Financial Markets* — John J. Murphy (John J. Murphy)
    A classic technical analysis text with systematic discussion of gap types, patterns, and integrated analysis with trendlines and volume.
  * Articles on “Gap Types & Strategies” in various quant/practitioner blogs (e.g., Quantified Strategies), which often discuss win rates and strategy design via statistical backtests across markets—useful as a more quantitative follow-up.