> ## 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.

# Speed Resistance Lines

> Understand the principles and applications of speed lines

## Overview

**Speed Resistance Lines (often shortened to speed lines)** are a technical analysis tool that combines trendlines and retracement ratios, also known as the **1/3–2/3 lines**.

Its core idea is:

> After a complete up or down move, support or resistance often appears in the **1/3 to 2/3 retracement zone**,
> and speed lines “draw” these potential support/resistance areas onto the chart in the form of **diagonal lines**.

Unlike traditional **horizontal support/resistance**:

* Speed lines are **slanted**, accounting for **price magnitude + the passage of time**
* They use **three lines** to divide a trend leg into three segments, representing different “speed” regimes
* How price behaves around different speed lines can help you judge:

  * whether the current trend is **strong, normal, or clearly weakening**
  * where pullbacks/rebounds may **stall or reverse**

You can think of it like this:
price is climbing a hillside, and we use three reference “ramps” with different slopes to measure:

* staying above the steepest line → very strong
* dropping to the middle ramp → normal speed but starting to “pant”
* breaking even the gentlest ramp → this climb is likely nearing its end

***

## The Principle Behind Speed Lines

### How to Construct Them

Speed lines may sound a bit “mystical,” but the steps are very mechanical:

#### 1. Identify a “complete swing leg”

* Uptrend: pick an **obvious low L** and a subsequent **obvious high H**
* Downtrend: pick an **obvious high H** and a subsequent **obvious low L**
* The leg must have a **clear, relatively independent start and end**—don’t pick points casually

> Tip: Prefer **major swing highs/lows**, e.g., the start and end of a clearly visible rally/decline. ([chartschool.stockcharts.com][1])

#### 2. Calculate the 1/3 and 2/3 price levels

Using an **uptrend** as an example:

* Swing distance: `D = H - L`
* 1/3 level price: `P₁ = L + D × 1/3`
* 2/3 level price: `P₂ = L + D × 2/3`

Using a **downtrend** as an example:

* Swing distance: `D = H - L`
* 1/3 level price: `P₁ = H - D × 1/3`
* 2/3 level price: `P₂ = H - D × 2/3` ([chartschool.stockcharts.com][1])

> These two price points roughly correspond to the “1/3 and 2/3 height” of the move from start to finish.

#### 3. Draw the three speed lines

**Speed lines for an uptrend:**

1. **Baseline (main line)**:
   connect **low L** directly to **high H**, and **extend to the right**
2. **2/3 speed line**:
   start from **low L**, connect to the point priced at **P₂ (the 2/3 level)**, then extend right
3. **1/3 speed line**:
   start from **low L**, connect to the point priced at **P₁ (the 1/3 level)**, then extend right

**Speed lines for a downtrend:**

1. **Baseline (main line)**:
   connect **high H** directly to **low L**, and **extend to the right**
2. **2/3 speed line**:
   start from **high H**, connect to the point priced at **P₂ (the 2/3 level)**, and extend right
3. **1/3 speed line**:
   start from **high H**, connect to the point priced at **P₁ (the 1/3 level)**, and extend right ([chartschool.stockcharts.com][1])

> Note:
> These lines often “cut through” historical prices rather than hugging exact highs/lows like traditional trendlines—this is a defining feature.

#### 4. A simple numerical example (uptrend)

* A stock rises from **10 to 22**
* Swing distance: `D = 22 - 10 = 12`
* 1/3 height: `10 + 12 × 1/3 = 14`
* 2/3 height: `10 + 12 × 2/3 = 18`

On the chart you get:

* a **baseline rising diagonal** from 10 → 22
* a **2/3 speed line** roughly corresponding to \~18
* a **1/3 speed line** roughly corresponding to \~14

As price moves forward in time, the three lines act like “three sloped ramps” for reference.

***

### Use Cases

#### 1. Judging trend strength (which “ramp” price is standing on)

Still using an uptrend as an example:

* Price runs **along the baseline or above the 2/3 speed line**:

  * the trend is very strong; pullbacks are shallow
* Price **breaks below the 2/3 line but stabilizes above the 1/3 line**:

  * upside momentum clearly slows, but the bigger bias remains bullish
* Price **also breaks below the 1/3 speed line decisively**:

  * often suggests the uptrend is meaningfully damaged,
    possibly transitioning into a **larger correction or reversal**

In a downtrend, the logic flips—the three lines become **dynamic overhead resistance**, and you interpret break order in the opposite direction. ([chartschool.stockcharts.com][1])

#### 2. Estimating the “normal depth” of a pullback/rebound

* After a sharp rally, if price pulls back and stabilizes near the **2/3 speed line**:

  * it’s generally viewed as a **healthy, normal pullback**
* If price drops straight to the **1/3 speed line**, or probes it repeatedly:

  * bulls are clearly running out of breath; guard against trend weakening or reversal

Likewise in a downtrend:

* rebound rejected near the 2/3 line → normal rebound
* rebound breaks above the 1/3 line → rebound strength is higher; watch for reversal risk

#### 3. Decision support: stops, targets, and scaling

* **Long positions**:

  * treat the **2/3 speed line** as the first “dynamic stop/reduction warning line”
  * the **1/3 speed line** becomes the “last line of defense”
* **Short positions**:

  * similarly, treat the two lines as **tiered profit-taking / risk-control levels**

Speed lines are not a mechanical trading system, but they can turn “fuzzy trend changes” into **visual line references**, making decisions easier. ([Investopedia][2])

***

## Core Concepts

### 1. Where the “1/3–2/3” idea comes from

* Dow Theory contains a classic notion:
  **Corrections often retrace about 1/3 to 2/3 of the prior move.**
* Speed lines “draw” this rule of thumb into a **diagonal-line structure** projected onto the chart. ([chartschool.stockcharts.com][1])

Compared with familiar tools:

* **Fibonacci retracements**: commonly 38.2%, 61.8%, primarily horizontal
* **Speed lines**: use the “coarser” 1/3 and 2/3 while incorporating time, expressed as **slanted lines**

### 2. Diagonal support/resistance: includes the “time dimension”

Traditional horizontal support/resistance answers one question:

> “At roughly what **price** might buying/selling show up?”

Speed lines also implicitly answer:

> “After **how much time**, even for the same retracement depth,
> might the corresponding price be different?”

Because the lines slope:

* on the **right side (future)**, the same line corresponds to higher/lower prices
* this fits reality: the longer a trend persists, the market’s accepted “reasonable price zone” often shifts

A simple intuition:

> Horizontal lines are “static defenses”; speed lines are “defenses that move with time.”

### 3. Anchor selection is critical

If you choose the start/end points incorrectly:

* the entire set’s **slope and placement** becomes distorted
* the “support/resistance” you see may be just random noise

Practical experience:

1. Prefer **important swing highs/lows** (weekly/daily first)
2. If a **new higher high/lower low** appears later,
   re-anchor the speed lines to fit the latest structure
3. Don’t force speed lines onto **purely sideways, trendless** ranges—this is pattern-hunting

### 4. Combining with other tools

Speed lines are rarely used in isolation; they work best when:

* overlaid with **traditional trendlines, moving averages, and support/resistance**
* combined with **Fibonacci retracements / price channels / volume-at-price**
* when multiple tools **overlap in the same zone**:

  * the importance of that area increases sharply (worth closer attention)

***

## Practical Applications

### Case 1: Buying pullbacks in an uptrend

**Background:**

* A stock rallies from **10 to 22**, forming a clear up-leg
* You trade **swings** and want more reasonable pullback entries

**Step 1: Draw speed lines**

* Low L = 10, High H = 22
* Distance D = 12
* 1/3 level: 14
* 2/3 level: 18
* Draw the baseline from 10→22, then draw and extend the 1/3 and 2/3 speed lines based on 14 and 18

**Step 2: Observe pullback behavior**

Later price action:

1. Price pulls back from 22 and first approaches the **2/3 speed line**:

   * it may pierce intraday, but the close returns above the line
   * volume contracts, and the candle leaves a relatively long lower wick
2. This suggests:

   * bulls are taking some profits, but buying support is still evident near the 2/3 line
   * the uptrend is just **normal turnover**, not severely damaged

**Practical trading idea:**

* Probe longs **in tranches near the 2/3 speed line**
* Place stops **a certain distance below** the 2/3 line (e.g., 2–3%)
* If price not only breaks 2/3 but even approaches the **1/3 speed line**:

  * pause adding, shift to wait-and-see or reduce, to avoid participating in a late-stage trend exhaustion phase

***

### Case 2: Shorting/reducing on rebounds in a downtrend

**Background:**

* An index drops from **3000 to 2400**, a clear bearish trend
* You already hold some shorts and want good areas to add or take profits

**Step 1: Draw speed lines (downtrend)**

* High H = 3000, Low L = 2400
* Distance D = 600
* 1/3 level: `3000 - 600 × 1/3 = 2800`
* 2/3 level: `3000 - 600 × 2/3 = 2600`
* Draw the baseline from 3000→2400, then construct the 1/3 and 2/3 speed lines using 2800 and 2600

**Step 2: Observe the rebound near the speed lines**

* The index rebounds from 2400 to **near the 2/3 speed line (\~2600)**
* You see:

  * a long upper wick on higher volume
  * continued decline the next day
* This suggests:

  * bears reasserted control near the 2/3 speed line
  * the rebound is a **bear-market rally** and hasn’t changed the larger bearish structure

**Practical idea:**

* For existing shorts:
  take partial profits **in tranches** near the 2/3 line,
  keep the remainder with a protective stop near the **1/3 line (\~2800)**
* For traders without positions:
  treat this as a **potential trend-following short area**,
  but you must confirm with other signals (volume, key horizontal levels, macro news) and manage risk tightly.

***

### Case 3: “Confluence zones” with traditional support/resistance and moving averages

In real charts you may see a situation like:

* the daily **2/3 speed line**
* sitting near:

  * a prior platform high
  * a clear mid/long-term moving average (e.g., the 60-day MA)
  * even an important round number (e.g., 3000)

When price returns to that area:

* If it’s a **pullback in an uptrend**:

  * this is a classic **multi-support confluence zone**, a strong area to look for long opportunities
* If it’s a **rebound in a downtrend**:

  * it becomes a **multi-resistance confluence zone**, where you should be cautious chasing and may consider reducing/shorting into strength

This “multiple tools pointing to the same area” is far more credible than relying on a single line.

***

## Common Questions

### Q1: What’s the difference between speed resistance lines and Fibonacci retracements? Can they replace each other?

**They’re not simple substitutes—think of them as tools with different perspectives.**

Key differences:

1. **Different ratios**

   * Speed lines use the “coarser” **1/3 and 2/3** zones
   * Fibonacci is finer: 38.2%, 50%, 61.8%, etc.

2. **Different form**

   * Speed lines → **diagonal lines**, reflecting the joint evolution of “price + time”
   * Fibonacci retracements → **horizontal lines**, emphasizing static “price height”

3. **Different emphasis**

   * Speed lines are better for reading the **process of trend-speed decay**
   * Fibonacci is often used for more precise **targets / take-profit levels**

A more practical approach:

> Use them **together**:
> when a speed line overlaps with a key Fibonacci level,
> that area deserves extra attention.

***

### Q2: Which timeframe should I use for speed lines—daily, weekly, or 5-minute?

A simple rule:

> **Match the timeframe to how long you plan to hold.**

* For **short-to-medium swing trades (days to weeks)**:

  * prioritize **daily speed lines**, supplemented by 4H / 60-minute charts
* For **long-term allocation / trend investing**:

  * draw speed lines on the **weekly or even monthly** chart to see the big structure
* For high-frequency scalping (minutes):

  * short-term noise is huge and speed lines can distort easily,
    recommended only for very experienced traders

A practical workflow:

1. Use **daily/weekly** to pick one or two key swing legs and draw speed lines as your “big map”
2. Then use **hourly charts** to time entries/stops with moving averages and short-term support/resistance

***

### Q3: Price often “pokes through” a speed line and then snaps back—does that mean it failed or it was a false break?

This is very common and doesn’t mean the tool is “useless.” Note a few points:

1. **Speed lines are zones, not precise cutoffs**

   * In practice you’ll see:

     * brief pierces followed by quick reclaims (false breaks)
     * intraday breaks, but the close reclaims the line
   * So don’t treat speed lines as exact buy/sell points “to the second decimal”

2. **You need confirmation from other signals**

   * volume: is it a real high-volume breakout or a low-volume “fake poke”?
   * candles: long wicks or strong real-body follow-through?
   * broader market: in high-volatility tape, single-line signals get noisy

3. **Risk control first—no “stubborn trades”**

   * If your pre-defined stop near the speed line is triggered:

     * **execute discipline first**, not “let’s wait and see”
   * If the market later proves it was a false break,
     you can re-enter when the setup improves—don’t fight the market emotionally.

***

## Summary

The essence of speed resistance lines can be distilled into a few points:

1. They use **three diagonal lines** to split a trend leg into three parts, reflecting different **trend speeds and retracement depths**
2. The **1/3–2/3 zone** is a classic correction zone, and speed lines “geometrize” it onto the chart
3. In an uptrend:

   * holding **above the 2/3 line** → strong trend
   * breaking 2/3 but holding 1/3 → **normal/deeper correction**
   * decisively breaking 1/3 → beware a **trend turn**
4. In a downtrend, the three lines symmetrically act as **dynamic overhead resistance**
5. Speed lines are not a standalone “holy grail indicator”; they work best with:

   * trendlines and moving averages
   * horizontal support/resistance
   * Fibonacci retracements and volume-at-price
     to form more convincing **confluence zones**.

Remember a practical principle:

> Treat speed lines as a **ruler for understanding trend rhythm and speed**,
> not as a “mechanical buy/sell point generator.”

***

## Further Reading

* John J. Murphy, *Technical Analysis of the Financial Markets*
  *The book includes dedicated sections on speed lines, Fibonacci tools, and other trend-analysis methods—one of the classic textbooks for systematic technical analysis study.* ([Wicked Stocks][3])
* StockCharts ChartSchool – *Speed Resistance Lines*
  *An English online resource explaining how to draw speed lines, with examples for uptrends/downtrends and guidance on re-anchoring.* ([chartschool.stockcharts.com][1])
* Investopedia – *Speed Resistance Lines: What It Means, How It Works*
  *Explains what speed lines do and their limitations from a definition-and-usage perspective; useful as supplementary reading.* ([Investopedia][2])

[1]: https://chartschool.stockcharts.com/table-of-contents/chart-analysis/chart-annotation-tools/speed-resistance-lines?utm_source=chatgpt.com "Speed Resistance Lines - ChartSchool - StockCharts.com"

[2]: https://www.investopedia.com/terms/s/speed_resistance_lines.asp?utm_source=chatgpt.com "Speed Resistance Lines: What It Means, How It Works"

[3]: https://wickedstocks.com/wp-content/uploads/2023/12/Speedline-Tutorial-11.21.23-1.pdf?utm_source=chatgpt.com "How to Construct Speed Lines"