Price Charts

[jayrav13]

Summary

Add terminal-based price charts for the underlying stock with intraday and historical views.

Details

Chart Library

• Use plotext or Textual's canvas for rendering charts as text/braille characters
• Evaluate both and choose based on rendering quality and Textual integration

Intraday Chart

• Default view during market hours
• 1-minute or 5-minute bars for current session
• Sparkline (compact) or candlestick (expanded) modes

Historical Chart

• Timeframe selector: 1D, 5D, 1M, 3M, 6M, 1Y, 5Y
• Candlestick or line chart
• Overlay 50-day and 200-day moving averages

Data Source

• Yahoo Finance historical price API via yfinance Ticker.history()
• Always uses Yahoo regardless of provider selection

Navigation

• c to toggle chart pane
• [ / ] to cycle timeframes
• + / - to zoom

Success Criteria

• Chart pane toggles with c
• Intraday chart displays during market hours
• Historical chart supports all timeframes (1D through 5Y)
• Moving average overlays (50d, 200d) displayed
• Timeframe cycling with [/] works
• Charts render cleanly in standard terminal sizes
• All existing tests pass
• New tests added for chart data fetching and rendering