Chart Type for Stock / Trading OHLC. Keywords: stock, trading, ohlc, candlestick, finance, price, volume. Best Chart: Candlestick Chart. Secondary Options: OHLC Bar, Heikin-Ashi. When to Use: Financial time-series with Open/High/Low/Close data; trading or investment product context only. When NOT to Use: Non-financial audience; no OHLC data available (use line chart); accessibility-first context. Data Volume Threshold: Real-time: Canvas required. Historical: paginate by time range. Max 500 candles visible at once. Color Guidance: Bullish: #26A69A. Bearish: #EF5350. Volume bars: 40% opacity below. Body fill vs hollow for OHLC style. Accessibility: B — Provide OHLC data table. Colorblind: use fill vs outline pattern (bullish = filled, bearish = hollow).. A11y Fallback: OHLC data table with sortable columns; numeric summary panel (daily change %). Library: Lightweight Charts (TradingView), ApexCharts. Interactive Level: Real-time + Hover + Zoom.