Skip to main content

​
Overview

An internal trendline (Internal Trendline) is a more “pragmatic” approach compared with the “traditional trendline.”
  • Traditional textbooks often say:
    In an uptrend, connect two or more rising lows; in a downtrend, connect two or more falling highs.
  • In real trading you’ll find that: If you strictly connect “all extreme highs/lows,” the resulting trendline often becomes:
    • too steep or oddly shaped
    • disconnected from most candlesticks
    • easily invalidated by just one long wick
The idea behind internal trendlines is simple:
Instead of fixating on the most extreme spikes, use a line that fits the majority of the price path better, even if it crosses some candle bodies or wicks.
That more realistic line is what we call an internal trendline. Its value lies in:
  • Better reflecting the approximate cost zone of mainstream capital
  • Being more suitable as a “valid trendline” to:
    • judge whether a trend still holds
    • observe whether pullbacks/rebounds are just “normal consolidation”
    • capture “truly meaningful breakouts”

​
The Concept of Internal Trendlines

​
Differences from Traditional Trendlines

​
1. Traditional trendlines: connect the “extreme points”

The classic method is usually:
  • Uptrend: connect two or more “obvious lows”
  • Downtrend: connect two or more “obvious highs”
Characteristics:
  • Tries not to cut through candle bodies or wicks
  • More like “outlining the outermost boundary price can touch”
The problem:
  • One or two extreme long upper/lower wicks can bend the entire line into something awkward
  • The line may look “clean”, but price spends most of the time far away from it, limiting usefulness

​
2. Internal trendlines: allow crossing candle bodies

Internal trendlines deliberately ignore a small number of extreme moves so the line hugs the “price core.” The approach is:
  • Not necessarily connecting the highest spike or lowest spike
  • Instead, find a line that sticks as closely as possible to swing highs/lows and candle-body edges
  • This line may:
    • pass through a few candle bodies
    • cut through the middle of some long wicks
    • even slightly “trim” extreme tops/bottoms
You can think of it like this:
A traditional trendline is like “drawing a boundary around the very outer edge of a mountain,” while an internal trendline is like “drawing the line along the mountainside trail people actually walk most.”

​
3. Focus on the “majority,” not the extremes

Internal trendlines care more about:
  • where price spends most of its time
  • around which slope most candles’ highs/lows oscillate
rather than letting:
  • one or two sudden spikes
  • an extreme news-driven surge/crash
“hijack” the entire trend structure.

​
Drawing Techniques

​
1. Start with the traditional line, then fine-tune

Suggested workflow:
  1. First draw a traditional trendline:
    • Uptrend: connect two clear lows
    • Downtrend: connect two clear highs
  2. Then gently “twist” the line based on the candle distribution:
    • make it, as much as possible:
      • touch more swing highs/lows
      • sit closer to more candle-body edges
    • while allowing:
      • a few candles to be crossed
      • a small number of extreme wicks to be ignored
During adjustment, ask yourself:
Is this line more consistent with the “average direction” of the overall move than the previous one?
If yes, you’re moving toward an “internal trendline.”

​
2. Prioritize “more touches + better overall fit”

Two key criteria to judge whether an internal trendline is “reliable”:
  1. Number of touches (contact points):
    • The more swing highs/lows cluster near the line → the more meaningful it is
  2. Overall fit:
    • Visually, price spends most of the time oscillating around the line rather than far away
It’s better to:
  • allow 2–3 “outlier” extreme candles to be crossed than to:
  • distort the entire line just to “accommodate” a few extreme candles, making most price action far from the line

​
3. Multi-timeframe adjustment

  • Draw a preliminary internal trendline on the daily chart
  • Then switch to 4H / 1H for a closer look:
    • if needed, make minor adjustments on lower timeframes so the line hugs key swing nodes better
  • Conversely:
    • you can start with the big-structure internal trendline on the weekly chart, then project it down to daily/4H for observation
Benefits of multi-timeframe alignment:
  • avoids being fooled by local noise
  • clarifies whether the current internal trendline is a higher-timeframe trendline or just a lower-timeframe internal line

​
Core Concepts

​
1. Internal trendline = a “more balanced” trendline

At its core, it does one thing:
Between “fully respecting extreme points” and “ignoring price entirely,” find a trendline that is closer to the overall equilibrium of price.
This line:
  • may not look perfectly neat
  • but often better reflects the real operating path of mainstream market capital.

​
2. Criteria for a “valid trendline”

A commonly used standard:
  • At least three points on or near the line (three or more touches/near-touches)
  • Each time price approaches the line:
    • it either clearly finds support/resistance
    • or briefly pierces and then quickly reclaims it
If a line:
  • is “barely” connected by just two points
  • has price far away most of the time
  • shows no meaningful reaction when approached
then no matter how “textbook” it looks, it’s likely “pretty but useless.” The advantage of internal trendlines is that they make it easier to find lines that actually “work.”

​
3. Trendlines are “zones,” not “metal wires”

The internal-trendline mindset emphasizes:
  • a trendline represents an approximate support/resistance zone
  • not a precise “steel wire” down to the decimal
Therefore:
  • a slight pierce of an internal trendline doesn’t necessarily mean the trend is truly broken
  • you should combine:
    • closing price location
    • confirmation from the next 1–3 candles
    • volume, patterns, and the overall market environment
to judge whether it’s:
  • normal volatility + a false break
  • or a high-volume break → a structural trend change

​
Practical Applications

​
Case 1: A “more realistic” support line in an uptrend

Scenario:
  • A stock rallies from 10 to 20 with multiple minor pullbacks
  • One or two days print exaggerated long lower wicks (e.g., dipping to 9.5 and snapping back)
If you use a traditional trendline:
  • you may connect “normal lows + the extreme 9.5 wick”
  • resulting in a very steep line
  • most pullbacks stay far above it, making it feel “not very useful”
Internal trendline approach:
  1. Ignore that extreme long lower wick and anchor the trend using other more normal lows
  2. Draw a trendline that cuts through the upper-middle of some candle bodies but hugs more pullback lows overall
Then:
  • subsequent pullbacks tend to stay above the internal trendline or briefly pierce and rebound
  • the line becomes a more realistic bullish defense line
In practice:
  • you can accumulate in tranches near the internal trendline
  • place stops a certain distance below the internal trendline

​
Case 2: Using an internal trendline to gauge rebound strength in a downtrend

Scenario:
  • An index falls from 3500 to 3000, with several sharp drop-and-snapback moves
  • The daily chart shows a few long upper wicks—brief spikes that quickly fade
If you force a trendline through those extreme highs:
  • the line becomes very steep, with price far below it most of the time
  • rebounds roll over long before reaching it, making the line seem useless
Internal trendline approach:
  1. Moderately ignore one or two extreme “panic spikes”
  2. Adjust the line using more “normal rebound highs” and “candle-body tops”
  3. Draw a downward internal trendline that hugs the majority of rebound highs
Result:
  • later rebounds tend to stall and roll over near the internal trendline
  • rebounds failing to reclaim the internal trendline → suggests the rebound is only a weak repair
Trading ideas:
  • For existing shorts: use the area near the internal trendline as a reference for taking profits/protective reduction or adding on opportunity
  • For longs: when price approaches the internal trendline and shows clear rejection, reduce exposure or trade tactically to avoid getting trapped near the top of a weak rebound.

​
Case 3: Breakout signals via an internal trendline

Scenario:
  • An instrument has been capped by a long-term downward internal trendline
  • A recent rebound makes multiple small-timeframe probes at this internal trendline:
    • First: slightly pierces, but closes below
    • Second: closes near the line, with expanding volume
    • Third: a strong bullish candle on volume clearly closes above the internal trendline
Interpretation:
  • Because the internal trendline already “fits most rebound highs,”
  • a valid breakout above it implies:
    • the “bearish inertia slope” has been interrupted
    • bears are losing control; the trend may at least shift from “down” to “sideways/range,” or even “up”
Practical approach:
  • Treat a “valid close above the internal trendline” as:
    • a short-cover signal
    • a signal for bulls to begin probing entries
  • Stops can be placed:
    • a certain distance below the internal trendline
    • or near half/one-third of the breakout candle’s real body

​
Common Questions

​
Q1: Internal trendlines sound “subjective”—can I draw them however I want?

Yes, internal trendlines are more subjective than “connecting the lowest/highest points.” But subjective doesn’t mean arbitrary. You can constrain yourself with some “hard rules”:
  1. At least three valid touch points (not just drawing a line off two points and calling it a trendline)
  2. Predefine rules before drawing, such as:
    • allow crossing at most X candle bodies
    • ignore extreme candles whose single-day range exceeds some percentage
  3. After drawing, validate historically:
    • whether price reactions near the line are stable:
      • repeated support/resistance
      • or repeated “false breaks followed by quick reclaims”
As long as you keep consistent rules and repeated validation, internal trendlines can shift from “subjective feel” to a statistically meaningful tool.

​
Q2: In the same move, I can draw several different internal trendlines—Which one is more credible?

First accept a reality: there isn’t a single uniquely correct line. You can follow a few principles:
  1. Prefer the line with more touches and better historical effectiveness
  2. If two lines are similar:
    • treat them as a “trend channel” or “slanted zone” rather than forcing a binary choice
  3. Across timeframes:
    • weekly/daily internal trendlines → better for directional bias
    • lower-timeframe internal trendlines → better for tactical entries/exits
Practically, you can handle it like this:
  • The higher-timeframe internal trendline determines: long or short (direction)
  • The lower-timeframe internal trendline determines: where to act (timing/rhythm)

​
Q3: If I keep adjusting the trendline to “fit price,” won’t it become hindsight bias?

If you change lines too often, it can indeed become “drawing lines that chase price.” A few principles to control adjustment frequency:
  1. Redraw only when a new major extreme/structural change appears
    • e.g., a significant new high/new low
    • or a clear slope change (from steep drop to gentle drop, from gentle rise to steep rise)
  2. Before each adjustment, ask:
    • am I changing it because I want the line to look nicer?
    • or because a structural change occurred and keeping the old line is clearly unreasonable?
  3. Keep records:
    • retain the old trendline as a dashed line on the chart
    • draw the new one as a solid line so you can see clearly: whether you are “adapting to the market,” or “finding explanations after the fact.”
In short:
Trendlines are meant to help you plan ahead and control risk, not to “annotate the past and prove you were right.”

​
Summary

  • An internal trendline is a way of drawing trendlines that stays closer to the actual price path than traditional trendlines:
    • it may cross some candle bodies/wicks
    • it intentionally ignores a few extreme moves
  • The goal is to find a “valid trendline”:
    • many touch points
    • genuinely reflects the “trend slope” where most candles reside
  • Key takeaways:
    • don’t blindly connect extreme highs/lows; pursue overall fit
    • treat trendlines as zones/bands, not steel wires
    • integrate “higher-timeframe direction + lower-timeframe timing”
  • Practical uses include:
    • serving as a more realistic dynamic support/resistance reference
    • judging whether a trend is slowing or reversing
    • using breakouts of internal trendlines to help capture major inflection points
Remember one honest line:
A line that looks beautiful, but price never reacts to, is just decoration; the value of internal trendlines is to draw the line that price actually respects as much as possible.

​
Further Reading

  • Related resource links
    • Tutorials in major broker/charting software help centers on “how to draw trendlines,” “valid trendlines,” “internal trendlines,” etc.; practice repeatedly with intraday and daily charts.
    • Articles and example charts on technical analysis education sites about Internal Trendline and Valid Trendline, allowing you to compare “hit rates” across different drawing methods.
  • Recommended books or articles
    • Technical Analysis of the Financial Markets — John J. Murphy (John J. Murphy) Systematically explains trendlines, channels, support/resistance and how to adjust them; foundational reading for understanding trend structure.
    • Japanese Candlestick Charting Techniques — Steve Nison (Steve Nison) Combine candlestick patterns with price reactions near trendlines to improve integrated “line + pattern” judgment.
    • Chapters on “trendline adjustment” and “trendline invalidation and redrawing” in various practical trading books and columns, which help you understand from a real-market perspective: when to stick with the original trendline and when to admit the structure has changed.