Awesome Oscillator: Measuring Market Momentum

It's called "Awesome" for a reason — it visualises momentum as a colour-coded histogram that even a beginner can read at a glance.

The Awesome Oscillator (AO), created by Bill Williams, measures market momentum by comparing a 5-period simple moving average with a 34-period SMA. The result is a histogram above and below a zero line — green bars when momentum is rising, red when it's falling.

The formula

Median Price = (High + Low) / 2

AO = SMA(Median Price, 5) − SMA(Median Price, 34)

That's it — the difference between a fast and a slow moving average of the median price, plotted as a histogram.

Worked example:

Value	Number
SMA(5) of median price	$52.00
SMA(34) of median price	$50.50
AO	+1.50 (green bar above zero)

A positive AO means the short-term average is above the long-term average — bullish momentum. A negative AO means the opposite.

Reading the histogram

Histogram state	Meaning
Bars above zero, growing (green)	Bullish momentum strengthening
Bars above zero, shrinking (red)	Bullish momentum fading
Bars below zero, growing (red)	Bearish momentum strengthening
Bars below zero, shrinking (green)	Bearish momentum fading
Cross above zero	Bullish shift
Cross below zero	Bearish shift

The three classic AO signals

Bill Williams defined three setups:

1. The saucer

Three consecutive bars above zero:

• Bar 1 is green
• Bar 2 is red (shorter)
• Bar 3 is green (taller than bar 2)

A bullish saucer = buy signal. The reverse (below zero) is a sell signal.

2. The zero-line cross

AO crosses from below to above zero → bullish. From above to below → bearish. Simple, but slower than the saucer.

3. Twin peaks

Two peaks below the zero line, the second shallower than the first, with a green bar between them → bullish (momentum losing downside force). The reverse above zero is bearish.

How to trade it

1. Trend filter — only trade AO signals in the direction of the higher-timeframe trend (200 SMA)
2. Saucer for entries — the saucer gives earlier entries than the zero-line cross
3. Twin peaks for reversals — momentum exhaustion signals
4. Divergence — AO diverging from price is a powerful warning

AO vs MACD

Feature	AO	MACD
MAs used	5 and 34 SMA of median	12 and 26 EMA of close
Output	Histogram	Line + signal + histogram
Signals	Saucer, twin peaks	Cross, divergence
Speed	Faster	More balanced

AO and MACD measure similar things with different inputs — AO is faster and more visual; MACD is smoother and more versatile.

Common mistakes

1. Trading every colour change — that's noise; trade the setups, not the bars
2. Using AO alone — always pair with a trend filter
3. Ignoring the zero line — a saucer above zero is bullish; below zero it's a different context
4. Low-timeframe noise — AO on a 1-minute chart is unreliable

How to start

1. Add the default AO (5, 34) to a daily or 4-hour chart
2. Add the 200 SMA as the trend filter
3. Learn the saucer first — it's the most reliable AO setup
4. Only trade saucers in the trend's direction
5. Always set a stop with the stop loss calculator and size with the position size calculator

Summary

The Awesome Oscillator turns the gap between two moving averages into a colour-coded histogram. Read the saucer for early entries, the zero-line cross for confirmation, and twin peaks for reversals. Pair it with a trend filter and it becomes a fast, visual momentum tool that's well-suited to beginners.