Chaikin Oscillator (ADOSC)

Classic volume oscillator momentum classic

An indicator that measures the momentum of the Accumulation/Distribution Line using the difference between two exponential moving averages.

Visual Example

Chaikin Oscillator (ADOSC) — annotated preview mapping to core implementation

Synthetic ideal per library logic. Generated 2026-07-01 IST via docs/generate_all_previews.py (reproducible; maps to core Next<T> implementation).

Description

An indicator that measures the momentum of the Accumulation/Distribution Line using the difference between two exponential moving averages.

Use to anticipate changes in the AD Line. Positive values indicate increasing buying pressure, while negative values indicate increasing selling pressure.

Native Rust implementation with gold-standard or TA-Lib parity tests where applicable.

Marc Chaikin developed this oscillator to identify momentum shifts in the AD Line. By applying EMAs of different lengths to the AD Line, it highlights changes in money flow before they become apparent in the cumulative total, providing an early warning system for trend exhaustion. — StockCharts ChartSchool

Typical applications:

Fade extremes in ranges; trade with trend on recoveries from oversold/overbought
Use divergences as early warning — confirm with structure or volume
Parameter default 3 — shorten for sensitivity, lengthen for stability
Drop into build_feature_matrix() for ML research

QuantWave implements this via the universal Next<T> trait — bit-identical across Rust streaming, Python streaming, and Polars .ta() batch plugins.

Formula / Specification

Implementation (quantwave-core/src/indicators/volume.rs):

\[ ADOSC = EMA(AD, 3) - EMA(AD, 10) \]

Gold-standard parity vectors: quantwave-core/tests/gold_standard/adosc.json.

Parameters

Parameter	Default	Description
`fastperiod`	3	Fast EMA period
`slowperiod`	10	Slow EMA period

Usage Examples

Streaming (Rust)

use quantwave_core::indicators::ADOSC;
use quantwave_core::traits::Next;

let mut ind = ADOSC::new(3);
for price in &prices {
    let value = ind.next(price);
}

Streaming (Python)

from quantwave import ADOSC

ind = ADOSC(3)
for price in prices:
    value = ind.next(price)

Polars Batch (Python)

import polars as pl
import quantwave as qw

def apply_chaikin_oscillator_adosc(series: pl.Series) -> pl.Series:
    ind = qw.ADOSC(3)
    return pl.Series([ind.next(float(v)) for v in series.to_list()])

df = (
    pl.read_csv('ohlcv.csv')
    .lazy()
    .with_columns(
        pl.col("close").map_batches(apply_chaikin_oscillator_adosc, return_dtype=pl.Float64).alias("chaikin_oscillator_adosc")
    )
    .collect()
)

All surfaces are bit-identical via the single Next<T> implementation and proptests.

Edge Cases & Limitations

Warm-up: first 3 bars may return NaN or partial state per implementation.
Parameter sensitivity: smaller periods increase noise; larger periods increase lag.
Sudden gaps or bad ticks can distort rolling windows — consider pre-filtering.
Single-series indicators ignore volume unless otherwise documented.
Validated via proptests against gold-standard vectors where available.
No look-ahead bias; streaming and Polars batch paths are bit-identical.

Boundary Behavior

Condition	Behavior
Warm-up	Leading bars return NaN until warmup_bars is satisfied.
period > len	When period exceeds series length, output is all NaN.
NaN inputs	NaN in input propagates to output (NaN out).
Invalid params	Non-positive period or missing required params raise ValueError.
Empty data	Empty input returns an empty result series.

Sources & References

Primary Source: https://www.investopedia.com/terms/c/chaikinoscillator.asp

Implementation: quantwave-core/src/indicators/volume.rs (ADOSC / ADOSC_METADATA). Parity: quantwave-core/tests/gold_standard/adosc.json

Provenance: Standards bulk upgrade 2026-07-01 IST — see docs/DOCUMENTATION_STANDARDS.md.