Ultimate Oscillator

The Ultimate Oscillator combines buying pressure across three timeframes (7, 14, 28 periods) into a single oscillator. This multi-timeframe approach reduces false signals common in single-period oscillators.

$$UO = 100 \times \frac{4 \times A_7 + 2 \times A_{14} + A_{28}}{4 + 2 + 1}$$

Where $A_n$ = Average of Buying Pressure / True Range over n periods.

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How It Works

flowchart TD
    subgraph Input["Price Data"]
        H["High"]
        L["Low"]
        C["Close"]
        PC["Prior Close"]
    end
    
    subgraph BP["Buying Pressure"]
        BPC["BP = Close - min(Low, Prior Close)"]
    end
    
    subgraph TR["True Range"]
        TRC["TR = max(High, Prior Close) - min(Low, Prior Close)"]
    end
    
    subgraph Avg["Multi-Timeframe Average"]
        A7["7-period: BP/TR × 4"]
        A14["14-period: BP/TR × 2"]
        A28["28-period: BP/TR × 1"]
    end
    
    subgraph Output["Result"]
        SUM["Sum weighted averages"]
        DIV["÷ 7"]
        UO["UO (0-100)"]
    end
    
    H & L & C & PC --> BPC & TRC
    BPC & TRC --> A7 & A14 & A28 --> SUM --> DIV --> UO

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Interpreting UO

UO Value	Interpretation
> 70	Overbought territory
50	Neutral
< 30	Oversold territory

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Trading Strategies

1. Classic Divergence Setup

Larry Williams (creator) recommended a specific divergence strategy:

Bullish Setup:

1. UO below 30 (oversold)
2. Price makes lower low, UO makes higher low
3. UO then breaks above the divergence high

Bearish Setup:

1. UO above 70 (overbought)
2. Price makes higher high, UO makes lower high
3. UO then breaks below the divergence low

2. Overbought/Oversold

Zone	Condition	Potential Action
Overbought	UO > 70	Watch for bearish divergence
Oversold	UO < 30	Watch for bullish divergence

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Why Three Timeframes?

flowchart LR
    subgraph Timeframes["Weighted Contribution"]
        T7["7-period (weight 4)<br/>Short-term sensitivity"]
        T14["14-period (weight 2)<br/>Medium-term balance"]
        T28["28-period (weight 1)<br/>Long-term stability"]
    end

Timeframe	Weight	Purpose
7 periods	4	Quick reaction to price changes
14 periods	2	Balances sensitivity and smoothness
28 periods	1	Provides stability, reduces noise

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UO vs RSI

Aspect	UO	RSI
Timeframes	3 combined	Single
False signals	Fewer	More frequent
Responsiveness	Balanced	Higher
Complexity	More complex	Simpler
Weighting	4:2:1	Equal across period

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Advantages

• Multi-timeframe — Reduces whipsaws
• Weighted approach — Emphasizes short-term while stabilizing
• Buying pressure focus — Measures actual demand
• Divergence-friendly — Designed for divergence trading

Disadvantages

• Complex calculation — Three separate averages
• Lagging — Multiple timeframes add lag
• Less intuitive — Harder to interpret than RSI
• Strict rules — Original strategy has specific conditions

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Further Reading

• Ultimate Oscillator - Investopedia
• Quantified Strategies: Ultimate Oscillator Guide

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Missing Data

UO needs High, Low, and Close together on every bar it uses — a gap in any one of the three (a weekend, a holiday, a stale exchange feed) voids the whole bar, including a High-only gap: buying pressure never reads High at all, so an unmasked High gap would silently distort the True Range sum instead of honestly voiding the bar. The 7/14/28-period windows mean N bars actually observed, not N calendar slots: on a market-closed gap the buying-pressure and true-range sums keep counting back through real bars, bridging straight from the last session before the gap to the first session after it — gaps become gaps (None), never the sentinel 50 UO used to fabricate, and never a carried-forward stale value. Three warm-ups stack: the 7-, 14-, and 28-period averages each need their own count of observed bars before they exist, so the first UO value only appears once the longest (28-period, by default) window has enough observed history.

Slot condition	UO output
Any of High/Low/Close missing on a bar	None — the bar is skipped entirely, not partially used
Fewer than the longest window's observed bars so far	None (warm-up)
A flat window where True Range sums to zero	None (honest 0/0, never a fabricated value)

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Indicator Assessment

The following chart positions the Ultimate Oscillator based on its complexity (ease of understanding and implementation) versus reliability (consistency of signals across market conditions). Points closer to the top indicate higher reliability; points to the left indicate lower complexity.

quadrantChart
    title Ultimate Oscillator Assessment
    x-axis Low Complexity --> High Complexity
    y-axis Low Reliability --> High Reliability
    quadrant-1 Complex & Reliable
    quadrant-2 Simple & Reliable
    quadrant-3 Simple & Unreliable
    quadrant-4 Complex & Unreliable
    Stocks: [0.60, 0.65]
    Crypto: [0.60, 0.55]

Assessment Breakdown

Dimension	Stocks	Crypto	Notes
Popularity	5/10	4/10	Respected but overshadowed by simpler oscillators like RSI; Larry Williams legacy gives credibility
Reliability	6.5/10	5.5/10	Multi-timeframe approach reduces false signals; crypto volatility still causes whipsaws
Complexity	6/10	6/10	Three separate calculations with weighting; requires understanding of buying pressure concept
Versatility	6/10	5.5/10	Designed for divergence trading; less useful for overbought/oversold alone
Recent Interest	4/10	4/10	Steady but not growing; newer traders prefer simpler alternatives