AO Divergence Indicator: New Extreme, Weaker Reading

Written by Dominic Walsh · Published 29 Jul 2026 · Last updated 26 Aug 2026

The ao divergence indicator reads the Awesome Oscillator without drawing it. Each bar that sets a fresh low across `DivLookback` bars gets compared with the old low. The code checks the oscillator at both. A lower price with a higher reading is bullish disagreement, and the arrow lands on price.

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: Bull divergence, Bear divergence
Alerts	popup, push notification, email, sound
Inputs	8

What the AO Divergence Indicator draws on the chart

Bull divergence places a lime arrow under a bar that made a lower low with a stronger oscillator.

Bear divergence places a red arrow above the mirror case.

Both arrows sit `ArrowOffsetPoints` from the candle, which defaults to `30`.

The oscillator itself stays internal, so the price chart carries only the two marks.

• Bull divergence: arrow, lime, width 3, arrow code 233
• Bear divergence: arrow, red, width 3, arrow code 234

How the AO Divergence Indicator calculates its values

Locating the previous extreme

iLowest scans `DivLookback` `30` bars, starting one bar back. It returns the index of the lowest low. iHighest does the same at the top. Starting the scan a bar back keeps the current candle out of its own comparison.

Comparing price with the oscillator

A bullish mark needs the current low below the low at that older index. It also needs iAO now to read higher than iAO there. Price made a new low. The oscillator did not follow. The bearish case reverses both tests.

Why this differs from a pivot method

Most divergence tools wait for confirmed swing pivots. That costs several bars. This one compares against a rolling extreme instead. So a mark can appear on the bar that sets the new low. The trade is speed against a looser idea of a swing.

How to read the signals

An arrow means the new extreme was not confirmed by momentum.

Marks can appear several bars running while price grinds to fresh lows.

Widen `DivLookback` to compare against a genuinely older extreme.

Treat clusters as one observation rather than several.

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

`EnableAlerts` ships on with `EnablePopup` carrying the message. `EnablePushNotify`, `EnableEmail` and `EnableSound` are off by default, and `SoundFile` names the clip. The guard allows one message per closed bar.

Every AO Divergence Indicator input

Core settings

Setting	What it does	Default
DivLookback	Bars scanned for the previous extreme, default `30`. Widen it for rarer and more meaningful comparisons.	30

Display settings

Setting	What it does	Default
ArrowOffsetPoints	Gap in points between a divergence arrow and its candle, default `30`.	30

Alert settings

Setting	What it does	Default
EnableAlerts	Turns the channels on as a group, default `true`.	on
EnablePopup	Raises the terminal dialog on a divergence, default `true`.	on
EnablePushNotify	Pushes the divergence through to your phone, default `false`.	off
EnableEmail	Sends the divergence by mail, default `false`.	off
EnableSound	Plays a sound when a divergence prints, default `false`.	off
SoundFile	File the sound channel reaches for, default `alert.wav`.	alert.wav

Settings that fit your chart

EURUSD H1 is the reference chart. There `DivLookback` at `30` covers a little over a day. Momentum disagreement needs room to develop. Shorter timeframes tend to produce clusters of small marks. On H4 the same setting spans a week, and each comparison carries more weight.

When the AO Divergence Indicator fails

A rolling extreme is not a pivot, so the older reference can shift as the window moves.

Marks arrive in runs when price makes several new lows in a row.

The Awesome Oscillator lags price by design. Some disagreement is simply that lag.

Copy the compiled AO Divergence 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.

Download the AO Divergence Indicator for MT4 and MT5

The zip holds the compiled AO Divergence 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

What does DivLookback at 30 compare against?

The lowest low or highest high across the previous thirty bars. iLowest and iHighest return that index. The current bar is then measured against it. Widen the setting and the comparison reaches further back, which makes each mark rarer.

Why does the Awesome Oscillator stay hidden?

Because this build needs the values, not the picture. iAO supplies a reading at each index and the code compares two of them. Keeping the histogram off the chart leaves the two arrow plots as the only thing you have to read.

How is this different from a pivot divergence tool?

Pivot methods wait for a swing to confirm on both sides. That costs bars. This one measures against a rolling extreme. So a Bull divergence mark can land on the bar that sets the new low. Faster, but the reference point is looser.

Why do Bull divergence marks appear in runs?

Because each new low inside the window triggers its own test. Price can grind down over several bars while the oscillator drifts sideways. Every one of those bars then qualifies. Read the run as a single observation, not as several.

Are results guaranteed?

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