Chart Type for Sentiment / Emotion. Keywords: sentiment, emotion, nlp, opinion, feeling, text-analysis. Best Chart: Word Cloud with Sentiment. Secondary Options: Sentiment Arc, Radar Chart. When to Use: NLP output visualization; exploratory analysis of text corpus sentiment; frequency-weighted keyword overview. When NOT to Use: Precise values matter (word size is inherently imprecise); screen-reader context; corpus < 50 items. Data Volume Threshold: 50–5000 terms optimal. Beyond 5000: apply top-N filtering before render. Avoid on mobile. Color Guidance: Positive: #22C55E. Negative: #EF4444. Neutral: #94A3B8. Word size maps to frequency. Accessibility: C — Word clouds fail screen readers. Never use as sole output of NLP analysis. Always pair with list view.. A11y Fallback: Sortable list view by frequency with sentiment label column; word cloud as supplementary only. Library: D3-cloud, Highcharts, Nivo. Interactive Level: Hover + Filter.