bartons

Financial and technical-analysis expressions for polars, implemented in Rust as a native plugin (PyO3 + maturin).

Each indicator is a factory returning a pl.Expr, so it composes with the rest of polars — inside select, with_columns, over, lazy frames, and so on.

Install

Requires Python 3.11+ and polars>=1.28,<1.44. Wheels are cp311-abi3, so one wheel per platform covers every Python from 3.11 up. Prebuilt wheels support Linux x86_64 and ARM64, macOS Intel and Apple silicon, and Windows x64; other platforms can build from the sdist with a Rust toolchain.

pip install bartons

Usage

import polars as pl
from bartons.indicators import ATR, CCI, DMI, EMA, MACD, RSI, SMA, TYPPRICE
from bartons.samples import sample_prices

prices = sample_prices("daily")

prices.select("date", "close", EMA(20), RSI(14), ATR(14)).tail(3)

┌────────────┬────────────┬────────────┬───────────┬──────────┐
│ date       ┆ close      ┆ ema        ┆ rsi       ┆ atr      │
╞════════════╪════════════╪════════════╪═══════════╪══════════╡
│ 2024-08-07 ┆ 209.820007 ┆ 217.642081 ┆ 40.192313 ┆ 6.920431 │
│ 2024-08-08 ┆ 213.309998 ┆ 217.229501 ┆ 45.237928 ┆ 6.809686 │
│ 2024-08-09 ┆ 216.240005 ┆ 217.135264 ┆ 49.118920 ┆ 6.666851 │
└────────────┴────────────┴────────────┴───────────┴──────────┘

Conventions

Price frames use a date or datetime column followed by lowercase open, high, low, close, and volume columns. Indicators refer to these lowercase OHLCV names by default; pass explicit column names or expressions when your schema differs.

Each indicator names its output after itself in lowercase like ema, sma ... Use explicit aliases to avoid name collisions:

prices.with_columns(EMA(20), SMA(20))                     # -> "ema", "sma"
prices.with_columns(EMA(20).alias("fast"), EMA(50).alias("slow"))

Single-source indicators typically default to pl.col("close") as source, but they also accept an explicit source, either as the first positional argument or via the src keyword, which makes them chainable with pipe:

EMA(20)                                     # default source
EMA(pl.col("close"), 20)                    # explicit source (positional)
EMA(20, src=pl.col("close"))                # explicit source (src keyword)
pl.col("close").pipe(EMA, 20)               # chaining with pipe

TRANGE, ATR and the price transforms like TYPPRICE accept multiple inputs like high, low and close, each overridable via keyword arguments:

TYPPRICE()                              # high, low and close
TYPPRICE(high="h", low="l", close="c")  # other column names

CCI is a single-source indicator, but defaults its source to TYPPRICE() rather than pl.col("close"):

CCI(20)                          # typical price by default
CCI(20, src=TYPPRICE())          # same thing

Indicators


`ADL()`	Accumulation/Distribution Line
`ADOSC(fast=3, slow=10)`	Chaikin A/D Oscillator
`ALMA(period=9, offset=0.85, sigma=6.0)`	Arnaud Legoux moving average
`AROON(period=14)`	Aroon Down and Up
`AROONOSC(period=14)`	Aroon Oscillator
`ATR(period)`	Average true range
`AVGPRICE()`	Average price, `(open + high + low + close) / 4`
`BBANDS(period=20, nbdev=2.0)`	Bollinger upper, middle and lower bands
`BBP(period=20, nbdev=2.0)`	Bollinger Percent B ratio
`BBW(period=20, nbdev=2.0)`	Bollinger BandWidth ratio
`BOP()`	Unsmoothed Balance of Power
`CCI(period=20)`	Commodity Channel Index
`CMF(period=20)`	Chaikin Money Flow
`CMO(period=14)`	Rolling-window Chande Momentum Oscillator
`DEMA(period)`	Double exponential moving average
`DMI(period=14)`	ADX, plus DI and minus DI expressions
`DONCHIAN(period=20)`	Donchian upper, middle and lower channels
`EMA(period)`	Exponential moving average
`HMA(period)`	Hull moving average
`KAMA(period=10, fastn=2, slown=30)`	Kaufman adaptive moving average
`KELTNER(period=20, nbatr=2.0)`	Keltner upper, middle and lower channels
`KER(period=10)`	Kaufman efficiency ratio
`LINREG(period=20, offset=0)`	Rolling linear-regression forecast
`LINREG_RMSE(period=20)`	Rolling linear-regression RMSE
`LINREG_RVALUE(period=20)`	Rolling linear-regression r-value
`LINREG_SLOPE(period=20)`	Rolling linear-regression slope
`MACD(fast=12, slow=26, signal=9)`	MACD, signal and histogram expressions
`MAD(period=20)`	Rolling mean absolute deviation
`MEDPRICE()`	Median price, `(high + low) / 2`
`MFI(period=14)`	Money Flow Index
`MOM(period=1)`	Momentum
`NATR(period=14)`	Normalized Average True Range (%)
`OBV()`	On-Balance Volume
`PPO(fast=12, slow=26)`	Price Percentage Oscillator (%)
`QUADREG(period=20, offset=0)`	Rolling quadratic-regression forecast
`QUADREG_CURVE(period=20)`	Rolling quadratic coefficient
`QUADREG_RMSE(period=20)`	Rolling quadratic-regression RMSE
`QUADREG_RVALUE(period=20)`	Rolling quadratic partial r-value
`QUADREG_SLOPE(period=20, offset=0)`	Rolling quadratic-regression slope
`RMA(period)`	Wilder's running moving average
`ROC(period=1)`	Rate of Change (%)
`ROCP(period=1)`	Rate of Change as an unscaled fraction
`RSI(period)`	Wilder's relative strength index
`SAR(afs=0.02, maxaf=0.2)`	Parabolic Stop and Reverse
`SMA(period)`	Simple moving average
`STOCH(period=14, fastn=3, slown=3)`	Slow stochastic oscillator, `%K` and `%D`
`STOCHRSI(period=14, fastn=3, slown=3)`	Stochastic RSI, fast K and fast D
`STREAK(src)`	Consecutive true count
`SUPERTREND(period=10, multiplier=3.0)`	Supertrend line and bullish/bearish direction
`TEMA(period=20)`	Triple exponential moving average
`TRANGE()`	True range
`TRIX(period=30)`	Triple-smoothed EMA rate of change (%)
`TYPPRICE()`	Typical price, `(high + low + close) / 3`
`ULTOSC(fast=7, medium=14, slow=28)`	Ultimate Oscillator
`WCLPRICE()`	Weighted close price, `(high + low + 2 * close) / 4`
`WILLR(period=14)`	Williams %R
`WMA(period)`	Weighted moving average
`ZLEMA(period)`	Zero-lag exponential moving average

Multi-output indicators return a Polars struct expression. You can unpack its fields directly in the query:

prices.select("date", MACD().struct.unnest())

Or keep the struct column in the query result and unnest it afterward:

result = prices.select("date", MACD())  # contains "macd" struct column
result.unnest()

Bare .unnest() expands every struct column; pass a column name such as .unnest("macd") to expand only that struct. The resulting field names must not collide with existing columns.

Eager API

The compiled kernels are also callable directly on polars series, bypassing the expression layer:

from bartons import kernels

kernels.ema(prices["close"], period=20)
kernels.dmi(prices["high"], prices["low"], prices["close"]).struct.unnest()

Parameters are keyword-only here. This path needs polars>=1.28; the expression API alone works further back.

Development

Set up the development environment and run the complete source-tree validation:

uv sync
uv run inv make

Run the Rust and Python tests without regenerating the extension and stubs:

uv run inv test

License

Bartons is available under the MIT License.

Related Projects

polars-talib — a Polars extension exposing TA-Lib indicators and candlestick-pattern functions as Polars expressions.
polars-ta — an expression-oriented collection of technical-analysis, WorldQuant, and Tongdaxin operators for Polars.
Polars — a fast DataFrame library with Rust and Python APIs, an expression engine, lazy query optimization, and Arrow-compatible memory.
PyO3 — Rust bindings for creating native Python modules and calling between Rust and Python.
Maturin — a build and publishing tool for Python packages implemented in Rust.

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

bartons-0.1.5.tar.gz (612.7 kB view details)

Uploaded Aug 26, 2026 Source

Built Distributions

If you're not sure about the file name format, learn more about wheel file names.

The dropdown lists show the available interpreters, ABIs, and platforms. Enable javascript to be able to filter the list of wheel files.

bartons-0.1.5-cp311-abi3-win_amd64.whl (6.5 MB view details)

Uploaded Aug 26, 2026 CPython 3.11+Windows x86-64

bartons-0.1.5-cp311-abi3-manylinux_2_28_x86_64.whl (7.2 MB view details)

Uploaded Aug 26, 2026 CPython 3.11+manylinux: glibc 2.28+ x86-64

bartons-0.1.5-cp311-abi3-manylinux_2_28_aarch64.whl (7.2 MB view details)

Uploaded Aug 26, 2026 CPython 3.11+manylinux: glibc 2.28+ ARM64

bartons-0.1.5-cp311-abi3-macosx_11_0_arm64.whl (6.3 MB view details)

Uploaded Aug 26, 2026 CPython 3.11+macOS 11.0+ ARM64

bartons-0.1.5-cp311-abi3-macosx_10_12_x86_64.whl (6.3 MB view details)

Uploaded Aug 26, 2026 CPython 3.11+macOS 10.12+ x86-64

File details

Details for the file bartons-0.1.5.tar.gz.

File metadata

Download URL: bartons-0.1.5.tar.gz
Upload date: Aug 26, 2026
Size: 612.7 kB
Tags: Source
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/7.0.0 CPython/3.13.14

File hashes

Hashes for bartons-0.1.5.tar.gz
Algorithm	Hash digest
SHA256	`59047e915c9ecd86039455c53be110caaf1907bb027ac73747f525a30f68de6b`
MD5	`e2c96aa6d59526e451a6291d66099b1e`
BLAKE2b-256	`104297f4074bee73f413a0a8c5e40141a4675ca54d6f0cf7c8e8a38833b49aed`

See more details on using hashes here.

Provenance

The following attestation bundles were made for bartons-0.1.5.tar.gz:

Publisher: release.yml on furechan/bartons

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: bartons-0.1.5.tar.gz
- Subject digest: 59047e915c9ecd86039455c53be110caaf1907bb027ac73747f525a30f68de6b
- Sigstore transparency entry: 2607928698
- Sigstore integration time: Aug 26, 2026
Source repository:
- Permalink: furechan/bartons@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Branch / Tag: refs/heads/main
- Owner: https://github.com/furechan
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release.yml@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Trigger Event: workflow_dispatch

File details

Details for the file bartons-0.1.5-cp311-abi3-win_amd64.whl.

File metadata

Download URL: bartons-0.1.5-cp311-abi3-win_amd64.whl
Upload date: Aug 26, 2026
Size: 6.5 MB
Tags: CPython 3.11+, Windows x86-64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/7.0.0 CPython/3.13.14

File hashes

Hashes for bartons-0.1.5-cp311-abi3-win_amd64.whl
Algorithm	Hash digest
SHA256	`13edef47f4586cb74c81daa95eca57d6217cb4825c53ad6fbe9c2ff17b128618`
MD5	`3dca81185051c5cc38f0468e624c06f0`
BLAKE2b-256	`e80775fcb12ff8694f95d627f1264df4ec8f64f1aef2c54d74dc9a1aaa40203c`

See more details on using hashes here.

Provenance

The following attestation bundles were made for bartons-0.1.5-cp311-abi3-win_amd64.whl:

Publisher: release.yml on furechan/bartons

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: bartons-0.1.5-cp311-abi3-win_amd64.whl
- Subject digest: 13edef47f4586cb74c81daa95eca57d6217cb4825c53ad6fbe9c2ff17b128618
- Sigstore transparency entry: 2607929293
- Sigstore integration time: Aug 26, 2026
Source repository:
- Permalink: furechan/bartons@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Branch / Tag: refs/heads/main
- Owner: https://github.com/furechan
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release.yml@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Trigger Event: workflow_dispatch

File details

Details for the file bartons-0.1.5-cp311-abi3-manylinux_2_28_x86_64.whl.

File metadata

Download URL: bartons-0.1.5-cp311-abi3-manylinux_2_28_x86_64.whl
Upload date: Aug 26, 2026
Size: 7.2 MB
Tags: CPython 3.11+, manylinux: glibc 2.28+ x86-64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/7.0.0 CPython/3.13.14

File hashes

Hashes for bartons-0.1.5-cp311-abi3-manylinux_2_28_x86_64.whl
Algorithm	Hash digest
SHA256	`a6b9b21a399746487eaef42fa65cf0d6f6d1bada84156bc886a10f4b97af92b2`
MD5	`8ba4439ade6076e02f56d669a7869428`
BLAKE2b-256	`c18141dcd0e043f00fb5b236a99aec17ec6894c730d3b48a34dba5617b30e916`

See more details on using hashes here.

Provenance

The following attestation bundles were made for bartons-0.1.5-cp311-abi3-manylinux_2_28_x86_64.whl:

Publisher: release.yml on furechan/bartons

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: bartons-0.1.5-cp311-abi3-manylinux_2_28_x86_64.whl
- Subject digest: a6b9b21a399746487eaef42fa65cf0d6f6d1bada84156bc886a10f4b97af92b2
- Sigstore transparency entry: 2607930287
- Sigstore integration time: Aug 26, 2026
Source repository:
- Permalink: furechan/bartons@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Branch / Tag: refs/heads/main
- Owner: https://github.com/furechan
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release.yml@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Trigger Event: workflow_dispatch

File details

Details for the file bartons-0.1.5-cp311-abi3-manylinux_2_28_aarch64.whl.

File metadata

Download URL: bartons-0.1.5-cp311-abi3-manylinux_2_28_aarch64.whl
Upload date: Aug 26, 2026
Size: 7.2 MB
Tags: CPython 3.11+, manylinux: glibc 2.28+ ARM64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/7.0.0 CPython/3.13.14

File hashes

Hashes for bartons-0.1.5-cp311-abi3-manylinux_2_28_aarch64.whl
Algorithm	Hash digest
SHA256	`ac3a95287204f62820d43a1e8d82840a973a4ddba429b8962188d44267a9bf3a`
MD5	`97c3b83e85fe1a0c226964ab22639cdc`
BLAKE2b-256	`74555d9353190b2be21b7e4b08c624478df2ef0b01f36a5e2dc9d1b2c210cd06`

See more details on using hashes here.

Provenance

The following attestation bundles were made for bartons-0.1.5-cp311-abi3-manylinux_2_28_aarch64.whl:

Publisher: release.yml on furechan/bartons

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: bartons-0.1.5-cp311-abi3-manylinux_2_28_aarch64.whl
- Subject digest: ac3a95287204f62820d43a1e8d82840a973a4ddba429b8962188d44267a9bf3a
- Sigstore transparency entry: 2607928999
- Sigstore integration time: Aug 26, 2026
Source repository:
- Permalink: furechan/bartons@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Branch / Tag: refs/heads/main
- Owner: https://github.com/furechan
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release.yml@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Trigger Event: workflow_dispatch

File details

Details for the file bartons-0.1.5-cp311-abi3-macosx_11_0_arm64.whl.

File metadata

Download URL: bartons-0.1.5-cp311-abi3-macosx_11_0_arm64.whl
Upload date: Aug 26, 2026
Size: 6.3 MB
Tags: CPython 3.11+, macOS 11.0+ ARM64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/7.0.0 CPython/3.13.14

File hashes

Hashes for bartons-0.1.5-cp311-abi3-macosx_11_0_arm64.whl
Algorithm	Hash digest
SHA256	`d66bfc70cc64ec91669665a78311092c798d7e867d30d49c8bd7b8d53dba56e9`
MD5	`a9a4ea199b7d883a1dbe0ee1ed00f6e6`
BLAKE2b-256	`88ad90c65a1a1da7b9c8c2536de281b9f6489381ac6f2486cc089d6035660429`

See more details on using hashes here.

Provenance

The following attestation bundles were made for bartons-0.1.5-cp311-abi3-macosx_11_0_arm64.whl:

Publisher: release.yml on furechan/bartons

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: bartons-0.1.5-cp311-abi3-macosx_11_0_arm64.whl
- Subject digest: d66bfc70cc64ec91669665a78311092c798d7e867d30d49c8bd7b8d53dba56e9
- Sigstore transparency entry: 2607929699
- Sigstore integration time: Aug 26, 2026
Source repository:
- Permalink: furechan/bartons@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Branch / Tag: refs/heads/main
- Owner: https://github.com/furechan
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release.yml@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Trigger Event: workflow_dispatch

File details

Details for the file bartons-0.1.5-cp311-abi3-macosx_10_12_x86_64.whl.

File metadata

Download URL: bartons-0.1.5-cp311-abi3-macosx_10_12_x86_64.whl
Upload date: Aug 26, 2026
Size: 6.3 MB
Tags: CPython 3.11+, macOS 10.12+ x86-64
Uploaded using Trusted Publishing? Yes
Uploaded via: twine/7.0.0 CPython/3.13.14

File hashes

Hashes for bartons-0.1.5-cp311-abi3-macosx_10_12_x86_64.whl
Algorithm	Hash digest
SHA256	`bbb439638bd854e7761b5bf8b06d0c7e32cc3308ab7a431f59da5e5daf5c4558`
MD5	`fe9daee5f893069adb865e75f90ea5c2`
BLAKE2b-256	`bc6a90d17be05d29bd7c0a91016e4e665bad25e8fed415594bf895e2cf3ee963`

See more details on using hashes here.

Provenance

The following attestation bundles were made for bartons-0.1.5-cp311-abi3-macosx_10_12_x86_64.whl:

Publisher: release.yml on furechan/bartons

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: bartons-0.1.5-cp311-abi3-macosx_10_12_x86_64.whl
- Subject digest: bbb439638bd854e7761b5bf8b06d0c7e32cc3308ab7a431f59da5e5daf5c4558
- Sigstore transparency entry: 2607930081
- Sigstore integration time: Aug 26, 2026
Source repository:
- Permalink: furechan/bartons@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Branch / Tag: refs/heads/main
- Owner: https://github.com/furechan
- Access: public
Publication detail:
- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: release.yml@80be1e1a4d935b866549c2f7e7d7406df0019a64
- Trigger Event: workflow_dispatch

Release history Release notifications | RSS feed

0.1.7

Sep 4, 2026 6 files

0.1.6

Sep 2, 2026 6 files

This release

0.1.5 This release

Aug 26, 2026 6 files

Aug 25, 2026 6 files

Aug 22, 2026 2 files

Aug 20, 2026 2 files

Aug 20, 2026 2 files

bartons 0.1.5

bartons

Install

Usage

Conventions

Indicators

Eager API

Development

License

Related Projects

Project links

Key dates

1 maintainer

Credits

GitHub Statistics

License expression

Requires

Tags

Classifiers

Download files

Source Distribution

Built Distributions

File details

File metadata

File hashes

Provenance

File details

File metadata

File hashes

Provenance

File details

File metadata

File hashes

Provenance

File details

File metadata

File hashes

Provenance

File details

File metadata

File hashes

Provenance

File details

File metadata

File hashes

Provenance

Release history Release notifications | RSS feed