termseries

Show timeseries data in the terminal using matplotlib. Plot stock prices from Yahoo Finance, sensor data from Home Assistant, or any numeric timeseries from local CSV files. Renders high-quality PNG charts inline (Kitty, iTerm2, Sixel) or saves to file, with an optional interactive Textual TUI.

Features

Data Sources

• Fetch stock/crypto/index prices from Yahoo Finance via the yahoo subcommand, with auto-picked intra-day intervals for short periods (e.g. 5m for 1d, 15m for 5d/7d)
• Chart prediction-market prices from Polymarket via the polymarket subcommand, with auto-picked aggregation intervals based on period duration
• Plot Home Assistant sensor history via the hass subcommand (REST API)
• Load local two-column CSV files (timestamp, value) via the csv subcommand
• Auto-detect and skip CSV headers, blank lines, NaN/Inf values
• Accept ISO 8601 timestamps and Unix epochs in CSV files
• Auto-detect the unit of measurement from Home Assistant entity attributes
• All timestamps are stored internally as UTC; use --tz to display in another timezone

Chart Modes

• Absolute values (default), indexed to 100%, logarithmic scale
• Drawdown from running peak, interval-aware returns (label adapts to interval), and relative price ratio
• Cumulative running total and point-to-point delta
• Rolling windows via --last and fixed bounds via --from/--to across all subcommands
• Calendar-anchored to-date periods: ytd, mtd, wtd, dtd, htd

Terminal Rendering

• Auto-detect Kitty, iTerm2, and Sixel-capable terminals for inline PNG display
• Fall back to writing a PNG file when no inline protocol is available
• Adaptive vertical calendar dividers (hours, days, months, or years), aligned to --tz
• Auto-detect dark/light terminal background for theme selection
• Force dark/light theme or inline/file output via environment variables

Interactive TUI

• Full-screen Textual TUI with dropdowns for period, aspect ratio, mode, and color cycle; "custom..." option in the Period menu for arbitrary values
• Live ticker/entity/file input with immediate re-render on submit
• Debounced chart re-render on terminal resize using cached data
• Auto-reload at a configurable interval (--reload N) or toggled with Ctrl+R
• Copy current plot to clipboard with Ctrl+Y

Customization

• Configurable aspect ratio (--ratio W:H or fit for terminal-filling)
• Seven built-in color cycles (tab10, Set1, Set2, Dark2, Accent, Pastel1, tab20)
• Layer custom .mplstyle overrides on top of the built-in dark/light themes
• Consistent font sizes across terminal widths in TUI mode

Clipboard & Output

• Copy rendered plot to system clipboard (-c or Ctrl+Y in TUI)
• Clipboard warnings when running inside Docker or over SSH
• Built-in demo command showcasing multiple chart modes

Developer Experience

• Fully typed (py.typed, mypy-checked)
• Pre-commit hooks for ruff, ruff-format, and mypy
• 430+ unit tests covering all modules, run in CI on Linux and Windows
• Docker support with Compose for containerized usage

Installation

pip install termseries

Or with uv:

uv tool install termseries

Or run it without installing, via uvx:

uvx termseries yahoo TSLA AAPL MSFT

Quick Start

# Plot stock prices (7-day default)
termseries yahoo TSLA AAPL MSFT

# Indexed comparison over 1 month
termseries --mode indexed yahoo --last 1mo TSLA AAPL MSFT

# Log scale over 5 years
termseries --mode log yahoo --last 5y AAPL MSFT GOOGL

# Drawdown chart
termseries --mode drawdown yahoo --last 1y TSLA AAPL

# Intra-day: 1-day period auto-picks 5-minute intervals
termseries yahoo TSLA --last 1d

# Explicit 1-minute interval override
termseries yahoo TSLA --interval 1m --last 1d

# Relative price ratio (exactly 2 tickers)
termseries --mode relative yahoo --last 1y AAPL MSFT

# Cumulative sum
termseries --mode cumulative csv sensor.csv --last 30d

# Point-to-point delta
termseries --mode delta yahoo TSLA --last 1mo

# Show gaps in data (break lines where data is missing)
termseries --gaps show hass sensor.living_room_temperature --last 7d

# Connect gaps under 1 hour, break larger ones
termseries --gaps 1h csv sensor.csv --last 30d

# Step-style line (staircase effect)
termseries --line-style step-post yahoo TSLA --last 5d

# Display x-axis in your local timezone
termseries --tz local yahoo TSLA AAPL

# Display x-axis in a specific timezone
termseries --tz Europe/Berlin hass sensor.living_room_temperature --last 1d

# Copy plot to clipboard
termseries yahoo -c TSLA AAPL

# Interactive TUI
termseries -i yahoo TSLA

# --- Home Assistant sensors ---

# Plot HASS sensor data (requires HASS_SERVER and HASS_TOKEN env vars)
termseries hass sensor.living_room_temperature sensor.bedroom_temperature

# Last 3 hours of data
termseries hass sensor.living_room_temperature --last 3h

# Last 30 days with explicit unit
termseries hass sensor.living_room_temperature --last 30d --unit '°C'

# Glob pattern: plot every matching entity in one call
termseries hass "sensor.*battery_level" --last 7d

# Interactive TUI with HASS data
termseries -i hass sensor.power_consumption

# --- Polymarket markets ---

# Plot a Polymarket market's "yes" price
termseries polymarket will-bitcoin-hit-150k-in-2026

# Plot the "no" outcome instead
termseries polymarket will-bitcoin-hit-150k-in-2026 --outcome no

# Last 30 days
termseries polymarket will-bitcoin-hit-150k-in-2026 --last 30d

# --- CSV files ---

# Plot a local CSV (two columns: timestamp, value)
termseries csv /path/to/sensor.csv

# Multiple files, last 7 days, with a custom unit label
termseries csv temp.csv humidity.csv --last 7d --unit '°C'

# Non-standard periods work everywhere
termseries yahoo TSLA --last 14d
termseries yahoo TSLA --last 2w

# Calendar-anchored to-date periods
termseries yahoo TSLA --last ytd
termseries yahoo TSLA --last mtd
termseries hass sensor.power_consumption --last dtd

# Interactive TUI with CSV data
termseries -i csv sensor.csv

CSV File Format

The csv subcommand expects two-column CSV files (timestamp, value). Header rows are auto-detected and skipped. Timestamps can be ISO 8601 strings or Unix epochs. Blank lines and NaN/Inf values are silently skipped. Naive timestamps (without an explicit offset) are assumed to be UTC.

2024-01-01T00:00:00Z,20.5
2024-01-02T00:00:00Z,21.0
2024-01-03T00:00:00Z,22.1

Each file becomes one series labelled by its filename (without extension). The --last filters to a now-anchored time window using free-form <number><unit> syntax (e.g. 7d, 2w, 3mo). Special values: max (default) shows all data with the x-axis extending to now; auto auto-fits the x-axis to the data with no empty space. The --unit option sets the y-axis label (default: value).

For high-frequency data, --resample reduces points into fixed, UTC-aligned buckets before rendering. Use --aggregate to select the bucket reducer (mean by default; also median, min, max, sum, count, first, and last). The plotted timestamp is the start of each bucket. For example:

termseries csv data/heart.csv --last 1mo --resample 1m --aggregate mean --unit bpm

--last 1m means the last minute; use --last 1mo for the last month.

The hass subcommand uses the same --last syntax and auto-detects the unit from the entity's attributes. Entity IDs may include glob-style patterns (* matches any run of characters, ? matches a single character), expanded against all entities currently known to Home Assistant:

# Plot every sensor whose ID contains "battery_level"
termseries hass "sensor.*battery_level" --period 7d

Quote patterns so your shell doesn't expand them first. The match isn't anchored to the end, so sensor.*battery_level also matches sensor.phone_battery_level_2.

Fitbit JSON conversion

tools/fitbit_to_csv.py combines Fitbit JSON exports in data/ into the standard two-column CSV consumed by termseries csv. Fitbit timestamps have no timezone marker, so the converter interprets them as Europe/Berlin by default and writes normalized UTC timestamps; override this with --timezone as needed.

python tools/fitbit_to_csv.py steps data data/steps.csv
python tools/fitbit_to_csv.py heart data data/heart.csv
python tools/fitbit_to_csv.py sleep data data/sleep.csv

termseries csv data/steps.csv --unit steps --last max
termseries csv data/heart.csv --unit bpm --last max
termseries --line-style step-post --gaps show csv data/sleep.csv --unit stage --last max

The sleep CSV represents detailed main-session sleep stages as a numeric step series: wake=0, REM=1, light=2, and deep=3. The converter sorts records and removes duplicate timestamps, and uses a temporary on-disk index so large heart-rate exports do not need to fit in memory.

Shared Options

Time range syntax (all subcommands)

Use --last for a rolling window ending now, --from and --to for a fixed inclusive interval, or --first for a duration beginning at the earliest returned data point. --to defaults to now; these forms cannot be combined. --period remains a compatibility alias for --last.

termseries yahoo TSLA --last 7d
termseries yahoo TSLA --from 2026-07-01 --to 2026-07-31
termseries csv readings.csv --from ytd
termseries csv readings.csv --first 7d

--from and --to accept ISO-8601 dates/times (such as 2026-07-01 or 2026-07-01T12:00:00Z), now, and the same relative/calendar expressions as --last (such as 7d and ytd).

Warning: --first is data-anchored, not calendar-anchored. Its effective start can change when a source adds or backfills older history, so use --from and --to for reproducible charts. It accepts durations only (for example 7d, 2w, or 3mo).

--last accepts free-form <number><unit> values:

Calendar boundaries for ytd/mtd/wtd/dtd/htd are computed in the timezone set by --tz (default UTC) — e.g. --tz local --last dtd means "since local midnight", not UTC midnight.

For Yahoo, non-native periods (e.g. 14d, 2w) are handled automatically by overfetching the next-larger native range and trimming client-side.

Yahoo-specific Options

When --interval auto (the default), termseries picks a sensible interval based on the period duration:

Polymarket-specific Options

When --interval auto (the default), termseries picks a sensible interval based on the period duration:

Home Assistant Setup

The hass subcommand connects to a running Home Assistant instance via the REST API. Set these environment variables:

export HASS_SERVER=http://homeassistant.local:8123
export HASS_TOKEN=your_long_lived_access_token

Create a long-lived access token in HASS under Profile > Security > Long-Lived Access Tokens. The unit label (y-axis) is auto-detected from the entity's unit_of_measurement attribute; use --unit to override.

Custom Styles

Chart appearance is controlled by Matplotlib .mplstyle files. termseries ships with two built-in themes (dark and light) that are automatically selected based on your terminal's background color. You can override any setting by passing an extra style file with --style:

# Use thinner lines, no markers
termseries --style my-overrides.mplstyle yahoo TSLA AAPL

The override file only needs the keys you want to change -- everything else is inherited from the base theme.

Built-in theme defaults

Both dark.mplstyle and light.mplstyle share the same layout settings (they differ only in colors):

Example override file

# my-overrides.mplstyle
axes.titlesize:   18          # bigger title
axes.labelsize:   16          # bigger axis labels
xtick.labelsize:  14          # bigger tick labels
ytick.labelsize:  14
lines.linewidth:  1.5
lines.marker:     None        # no markers, just lines
figure.dpi:       150         # lower DPI for smaller file size
grid.linestyle:   --          # dashed grid

See the full Matplotlib customization guide for all available keys.

Environment Variables

Theme

Use --theme dark|light|auto to control the plot theme. The default is auto, which detects the terminal background.

termseries --theme dark yahoo TSLA

To persist the setting, create a termseries.env config file. Termseries searches for (first found wins):

1. .termseries.env in the current working directory
2. ~/.config/termseries/termseries.env

# termseries.env
THEME=dark

See termseries.env.example for a commented template.

Precedence (highest to lowest): --theme flag → config file → auto-detection.

Output

Use --output to control where the rendered PNG goes:

termseries --output chart.png yahoo TSLA
termseries --output - yahoo TSLA | display   # pipe to ImageMagick
termseries --output inline yahoo TSLA

Use --protocol to override which inline graphics protocol is used (default: auto):

This is especially useful inside tmux or other multiplexers where terminal detection can fail:

termseries --output inline --protocol iterm2 yahoo TSLA

Both options can be persisted in termseries.env:

# termseries.env
OUTPUT=inline
PROTOCOL=kitty

Precedence (highest to lowest): CLI flag → config file → auto-detection.

Development

git clone https://github.com/deeplook/termseries.git
cd termseries
uv sync --all-extras
uv run pre-commit install
make test

Contributing

See CONTRIBUTING.md.

License

MIT