plotext-financial-chart
ASCII financial line charts for markdown using plotext dot marker. TRIGGERS - financial chart, line chart, plotext
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/terrylica/cc-skills --skill plotext-financial-chart- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads plotext-financial-chart automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Plotext Financial Chart Skill
Create ASCII financial line charts for GitHub Flavored Markdown using plotext with dot marker (•). Pure text output — renders correctly on GitHub, terminals, and all monospace environments.
Self-Evolving Skill: This skill improves through use. If instructions are wrong, parameters drifted, or a workaround was needed — fix this file immediately, don't defer. Only update for real, reproducible issues.
When to Use This Skill
- Adding price path / line chart diagrams to markdown documentation
- Visualizing trading concepts (barriers, thresholds, entry/exit levels)
- Any GFM markdown file needing financial data visualization
- User mentions "financial chart", "line chart", "price chart", "plotext", or "trading chart"
NOT for: Flowcharts or architecture diagrams.
Preflight Check
All-in-One Preflight Script
/usr/bin/env bash << 'PREFLIGHT_EOF'
python3 --version &>/dev/null || { echo "ERROR: Python 3 not found"; exit 1; }
if command -v uv &>/dev/null; then PM="uv pip"
elif command -v pip3 &>/dev/null; then PM="pip3"
else echo "ERROR: Neither uv nor pip3 found"; exit 1; fi
python3 -c "import plotext" 2>/dev/null || { echo "Installing plotext via $PM..."; $PM install plotext; }
python3 -c "
import plotext as plt, re
plt.clear_figure()
plt.plot([1,2,3], [1,2,3], marker='dot')
plt.plotsize(20, 5)
plt.theme('clear')
output = re.sub(r'\x1b\[[0-9;]*m', '', plt.build())
assert '•' in output
" && echo "✓ plotext ready (dot marker verified)"
PREFLIGHT_EOF
Quick Start
import re
import plotext as plt
x = list(range(20))
y = [97, 98, 100, 101, 100, 98, 100, 101, 102, 101,
100, 98, 100, 101, 102, 103, 102, 101, 100, 100]
plt.clear_figure()
plt.plot(x, y, marker="dot", label="Price path")
plt.hline(103) # Upper barrier
plt.hline(97) # Lower barrier
plt.hline(100) # Entry price
plt.title("Triple Barrier Method")
plt.xlabel("Time (bars)")
plt.ylabel("Price")
plt.plotsize(65, 22)
plt.theme("clear")
print(re.sub(r'\x1b\[[0-9;]*m', '', plt.build()))
Mandatory Settings
Every chart MUST use these settings:
| Setting | Code | Why |
|---|---|---|
| Reset state | plt.clear_figure() | Prevent stale data |
| Dot marker | marker="dot" | GitHub-safe alignment |
| No color | plt.theme("clear") | Clean text output |
| Strip ANSI | re.sub(r'\x1b\[…', '', …) | Remove residual escape codes |
| Build as string | plt.build() | Not plt.show() |
Marker Reference
| Marker | GitHub Safe | Use When |
|---|---|---|
"dot" | Yes | Default — always use |
"hd" | Yes | Terminal-only, need smoothness |
"braille" | No | Never for markdown |
"fhd" | No | Never — Unicode 13.0+ only |
Rendering Command
/usr/bin/env bash << 'RENDER_EOF'
python3 << 'CHART_EOF'
import re
import plotext as plt
x = list(range(20))
y = [97, 98, 100, 101, 100, 98, 100, 101, 102, 101,
100, 98, 100, 101, 102, 103, 102, 101, 100, 100]
plt.clear_figure()
plt.plot(x, y, marker="dot", label="Price path")
plt.hline(103)
plt.hline(97)
plt.hline(100)
plt.title("Triple Barrier Method")
plt.xlabel("Time (bars)")
plt.ylabel("Price")
plt.plotsize(65, 22)
plt.theme("clear")
print(re.sub(r'\x1b\[[0-9;]*m', '', plt.build()))
CHART_EOF
RENDER_EOF
Embedding in Markdown (MANDATORY: Source Adjacent to Chart)
Every chart MUST be immediately followed by a <details> block with Python source. Explanatory text goes after the <details> block, never between chart and source.
✅ CORRECT: Chart → <details> → Explanatory text
❌ WRONG: Chart → Explanatory text → <details>
See ./references/api-and-patterns.md for full embedding template.
Mandatory Checklist
-
plt.clear_figure()— Reset state -
marker="dot"— Dot marker for GitHub -
plt.theme("clear")+re.sub()strip — No ANSI codes -
plt.title("...")— Every chart needs a title -
plt.xlabel/plt.ylabel— Axis labels -
plt.plotsize(65, 22)— Fits 80-col code blocks -
<details>block immediately after chart (before any explanatory text)
Troubleshooting
| Issue | Cause | Solution |
|---|---|---|
| ANSI codes in output | Missing theme/strip | Add plt.theme("clear") and re.sub() strip |
| Misaligned on GitHub | Wrong marker type | Use marker="dot", never braille/fhd |
| Chart too wide | plotsize too large | Use plt.plotsize(65, 22) for 80-col blocks |
| No diagonal slopes | Too few data points | Use 15+ data points for visible slopes |
ModuleNotFoundError | Not installed | Run preflight check |
| Empty output | Missing build() | Use plt.build() not plt.show() |
Resources
- plotext GitHub
- Full API, patterns, and embedding guide
- Tool selection rationale
Post-Execution Reflection
After this skill completes, check before closing:
- Did the command succeed? — If not, fix the instruction or error table that caused the failure.
- Did parameters or output change? — If the underlying tool's interface drifted, update Usage examples and Parameters table to match.
- Was a workaround needed? — If you had to improvise (different flags, extra steps), update this SKILL.md so the next invocation doesn't need the same workaround.
Only update if the issue is real and reproducible — not speculative.
FAQ
What does the plotext-financial-chart skill do?
ASCII financial line charts for markdown using plotext dot marker. TRIGGERS - financial chart, line chart, plotext
How do I install plotext-financial-chart?
Run npx skills add https://github.com/terrylica/cc-skills --skill plotext-financial-chart in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/plotext-financial-chart/ (personal) or .claude/skills/plotext-financial-chart/ (project).
Which AI agents can use plotext-financial-chart?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is plotext-financial-chart safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains plotext-financial-chart?
It is published by terrylica in terrylica/cc-skills. It has 145 recorded installs.
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