feat(highcharts): implement point-and-figure-basic

[github-actions]

Implementation: point-and-figure-basic - highcharts

Implements the highcharts version of point-and-figure-basic.

File: plots/point-and-figure-basic/implementations/highcharts.py

Parent Issue: #3755

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🤖 impl-generate workflow

[claude]

AI Review - Attempt 1/3

Image Description

The plot displays a Point and Figure (P&F) chart with 8 columns (0-7) on the X-axis representing reversals, and price values ($76-$136) on the Y-axis. Blue "X" characters mark rising price columns, while red "O" characters mark falling price columns. The chart shows a clear pattern: column 0 starts with X's rising from ~$100 to ~$110, column 1 shows O's falling from ~$108 to ~$96, column 2 has X's rising from ~$100 to ~$112, column 3 shows a deep O decline from ~$110 to ~$80, column 4 has X's rising from ~$82 to ~$90, column 5 shows O's at ~$84-88, column 6 has a strong X rally from ~$88 to ~$132, and column 7 shows O's falling from ~$130 to ~$112. The title correctly shows "point-and-figure-basic · highcharts · pyplots.ai" with a subtitle indicating "$2 Box Size | 3-Box Reversal | Simulated Stock Data". A legend in the top-right shows "X (Rising)" in blue and "O (Falling)" in red. Grid lines are subtle and the layout is clean with good proportions.

Quality Score: 91/100

Criteria Checklist

Visual Quality (37/40 pts)

• VQ-01: Text Legibility (10/10) - Title, axis labels, tick marks, and X/O characters all clearly readable at full resolution
• VQ-02: No Overlap (8/8) - No overlapping text or elements; X and O characters properly spaced in their columns
• VQ-03: Element Visibility (7/8) - X and O symbols well-sized and clearly visible; minor deduction as symbols could be slightly larger for perfect visibility
• VQ-04: Color Accessibility (4/5) - Blue and red have good contrast but red-blue is not the ideal colorblind-safe palette; however, symbols (X vs O) provide redundant encoding
• VQ-05: Layout Balance (5/5) - Good use of canvas space, chart properly centered with balanced margins
• VQ-06: Axis Labels (2/2) - Y-axis has "Price ($)" with unit formatting, X-axis has "Column (Reversal Number)"
• VQ-07: Grid & Legend (1/2) - Grid is subtle, legend well-placed; minor deduction as legend symbols show squares instead of the actual X/O markers

Spec Compliance (24/25 pts)

• SC-01: Plot Type (8/8) - Correct Point and Figure chart implementation using X's and O's
• SC-02: Data Mapping (5/5) - Columns on X-axis, price on Y-axis as specified
• SC-03: Required Features (4/5) - Has X/O columns, box size, reversal logic; missing support/resistance trend lines mentioned in spec notes
• SC-04: Data Range (3/3) - Full price range visible from $76 to $136
• SC-05: Legend Accuracy (2/2) - Legend correctly identifies X (Rising) and O (Falling)
• SC-06: Title Format (2/2) - Correctly uses "{spec-id} · {library} · pyplots.ai" format

Data Quality (18/20 pts)

• DQ-01: Feature Coverage (7/8) - Shows uptrends, downtrends, reversals, and consolidation; demonstrates multiple phases but could show more complex patterns
• DQ-02: Realistic Context (6/7) - Simulated stock data with plausible price movements; good use of different market phases
• DQ-03: Appropriate Scale (5/5) - Stock prices around $80-130 are realistic; box size of $2 is sensible

Code Quality (8/10 pts)

• CQ-01: KISS Structure (1/3) - Uses helper function to_box() instead of inline code; has some structural complexity
• CQ-02: Reproducibility (3/3) - Uses np.random.seed(42) for reproducible data
• CQ-03: Clean Imports (2/2) - All imports are used
• CQ-04: No Deprecated API (1/1) - Uses current APIs
• CQ-05: Output Correct (1/1) - Saves as plot.png

Library Features (4/5 pts)

• LF-01: Distinctive Features (4/5) - Good use of Highcharts data labels feature for X/O rendering, scatter series with custom styling, interactive HTML export; could leverage more Highcharts-specific features like annotations for trend lines

Strengths

• Excellent implementation of P&F chart logic with proper column-based structure
• Creative use of data labels to render X and O characters instead of traditional markers
• Good separation of X and O series for proper coloring and legend
• Proper box size and 3-box reversal implementation
• Clean subtitle with chart parameters
• Generates both PNG and interactive HTML versions

Weaknesses

• Missing support/resistance trend lines mentioned in the specification notes
• Legend shows square symbols instead of X/O characters (Highcharts limitation)
• Uses a helper function to_box() instead of inline code (minor KISS violation)
• Red color for O's could be changed to a more colorblind-friendly option like orange

Verdict: APPROVED