Ultimate Oscillator
Overview
The Ultimate Oscillator, developed by Larry Williams, combines buying pressure across three different timeframes — typically seven, fourteen, and twenty-eight periods — into a single indicator weighted to reduce false signals. By incorporating multiple timeframes, it avoids the whipsaws common in single-period oscillators while still providing timely signals. Williams designed specific entry criteria involving divergence and threshold breaks to trade this indicator.
Key Concepts
Buying pressure is calculated as the close minus the true low for each period. True range provides the denominator for normalising buying pressure. Three timeframes are combined with weights: four for the shortest, two for the middle, and one for the longest period. The oscillator ranges from zero to one hundred, with seventy considered overbought and thirty oversold. Williams' preferred signal is bullish divergence combined with a break above the divergence high. The multi-timeframe construction makes it more stable than single-period oscillators.
Entry Signals
Enter long when bullish divergence forms (price makes a lower low, oscillator makes a higher low) and the oscillator subsequently breaks above the high between the two lows. The oscillator must be below thirty during at least one of the divergence lows. Enter short when bearish divergence forms with the oscillator above seventy. Confirm with price closing above resistance for bullish signals or below support for bearish signals.
Exit Signals
Exit long positions when the oscillator rises above seventy or when bearish divergence appears. Exit short positions when the oscillator falls below thirty or when bullish divergence appears. Williams recommended exiting when the oscillator rises above fifty after a buy signal and then falls back below. Close positions if the divergence pattern is invalidated by new extreme prices.
Best Timeframes
Daily, Weekly
Pro Tips
The Ultimate Oscillator is best used with its specific divergence-based trading rules rather than as a generic overbought and oversold indicator. Larry Williams designed very precise entry and exit criteria that should be followed as a system rather than cherry-picked. The multi-timeframe weighting is what gives this oscillator its edge — it filters out the noise that plagues faster oscillators.
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