Trendline by Angle Indicator for MT4 and MT5

Written by Dominic Walsh · Published 14 Jul 2026 · Last updated 24 Sep 2026

Hand-drawn trendlines depend on which swings you pick. The trendline by angle indicator removes that choice: it starts a line at the latest swing low and swing high and gives each a fixed angle of 30 degrees, scaled by the average range. A touch of the line that closes back on its right side prints a mark.

This build ships as a compiled .ex4 for MT4 and .ex5 for MT5; the screenshots below come from EURUSD H1.

Platforms	MT4 (.ex4) + MT5 (.ex5)
Chart window	Main price chart
Plots	2: Angle Line Buy, Angle Line Sell
Alerts	popup, push notification, email, sound
Inputs	14

What each plot looks like

Two angled lines and two marks on price.

`UpLineColor` `clrLime` draws the rising line.

`DnLineColor` `clrRed` draws the falling line.

`Angle Line Buy` prints lime with arrow 233.

`Angle Line Sell` prints red with arrow 234.

Lines restart when a new swing confirms.

• Angle Line Buy: arrow, lime, width 2, arrow code 233
• Angle Line Sell: arrow, red, width 2, arrow code 234

How the Trendline by Angle Indicator calculates its values

Anchors

`Depth` `8` bars on each side confirm a swing. The newest swing low anchors the rising line.

Angle

`AngleDegrees` `30.0` sets the tilt. The build turns it into price per bar using the `AtrPeriod` `14` range, times `SlopeScale` `1.0`.

Touch

A bar whose low comes within `TouchTolAtr` `0.20` of a range of the rising line and closes above it prints a buy.

How to watch it

Green rises from the newest swing low.

Red, by contrast, falls from the newest swing high.

So a lime mark is a touch that held.

Likewise, a red mark is a rejection from above.

`ArrowGapAtr` `0.60` also spaces the marks.

Swings confirm eight bars late.

Alert channels in this build: popup, push notification, email and sound, one message per closed bar.

Touches that hold send one message per bar under `EnableAlerts`, with the popup the only route on by default.

Every Trendline by Angle Indicator input

Core settings

Setting	What it does	Default
Depth	fractal half-width for swing pivots. Bars on each side of a swing, `8`.	8
AtrPeriod	ATR period (angle-to-price scaling). Range window for the slope, `14`.	14
AngleDegrees	fixed trend-line angle in degrees. Line tilt in degrees, `30.0`.	30.0
SlopeScale	extra multiplier on the ATR slope. Extra slope multiplier, `1.0`.	1.0
TouchTolAtr	touch tolerance as fraction of ATR. Touch distance in ranges, `0.20`.	0.20

Display settings

Setting	What it does	Default
ArrowGapAtr	arrow offset from bar in ATR units. Mark gap in ranges, `0.60`.	0.60
UpLineColor	Rising line colour, `clrLime`.	lime
DnLineColor	Falling line colour, `clrRed`.	red

Alert settings

Setting	What it does	Default
EnableAlerts	Master alert switch, `true`.	on
EnablePopup	Popup, `true`.	on
EnablePushNotify	(see inputs panel)	off
EnableEmail	(see inputs panel)	off
EnableSound	(see inputs panel)	off
SoundFile	(see inputs panel)	alert.wav

Where this one belongs

Fixed-angle lines suit trending charts. On the hourly EURUSD screenshot, a new line forms every few days. On M15 lower `AngleDegrees` for gentler lines, while on D1 a 30-degree line matches steady trends.

Where this one struggles

A fixed angle ignores how steep the trend really is.

Lines restart with each new swing.

Touches in sideways markets mean little.

Only the popup is on at first.

Copy the compiled Trendline by Angle Indicator file into your MQL4/Indicators folder, and the MT5 build into MQL5/Indicators, then restart the terminal and drag it onto a chart. The step-by-step guide with screenshots is at how to install MT4 and MT5 indicators.

Background reading on the method behind the Trendline by Angle Indicator: Trend line (technical analysis) on Wikipedia, Average True Range at Investopedia.

Download the Trendline by Angle Indicator for MT4 and MT5

The zip holds the compiled Trendline by Angle Indicator build for MT4 and MT5, plus a short README. Compiled files only, no source. Enter your email below and the download link arrives in your inbox.

FAQ

How does AngleDegrees 30.0 become a price slope?

The build takes the tangent of 30 degrees, about 0.58, and multiplies it by the average range at the swing. The line rises that much per bar.

What does TouchTolAtr 0.20 count as a touch?

A bar whose low comes within a fifth of an average range of the rising line. The bar must also close above the line for the mark to print.

Why do the Angle Line Buy lines restart?

Each line anchors to the newest confirmed swing. Once a fresh swing low confirms, the rising line starts over from that new low, keeping the same thirty-degree tilt as before.

Is a fixed AngleDegrees line better than two-point lines?

It is more consistent. Two-point lines come out steep or flat depending on which swings happened to form; this one keeps the same slope every time, so touches mean the same thing.

Are results guaranteed?

No. Trading involves risk. Results are not guaranteed; past performance is not indicative of future results. Use the Trendline by Angle Indicator as one input. Always backtest before trading live.