[candlestick-volume] Professional Stock Candlestick Chart with Volume

[MarkusNeusinger]

A professional candlestick chart for financial data showing OHLC (open, high, low, close) prices with volume bars in a synchronized lower pane. Includes proper date axis and crosshair.

[claude]

✅ Spec ID: candlestick-volume

Rationale: The key differentiator from the existing candlestick-basic spec is the synchronized volume pane - a common professional financial charting pattern. The crosshair feature is secondary.

Add label approved to begin generation.

[github-actions]

✅ Specification Ready: candlestick-volume

PR: #3074

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specification.md

candlestick-volume: Stock Candlestick Chart with Volume

Description

A professional candlestick chart combining OHLC (open, high, low, close) price data with volume bars in a synchronized lower pane. The dual-pane layout presents price action in the main chart with corresponding trading volume below, sharing a common time axis. This format is the standard for technical analysis platforms, enabling traders to correlate price movements with trading activity and identify volume-confirmed trends or reversals.

Applications

• Analyzing stock price movements alongside trading volume to confirm breakout patterns
• Identifying divergences between price trends and volume for potential reversal signals
• Evaluating cryptocurrency or forex pairs with volume context for entry/exit decisions

Data

• date (datetime) - Trading date or timestamp for each period
• open (numeric) - Opening price at the start of the period
• high (numeric) - Highest price during the period
• low (numeric) - Lowest price during the period
• close (numeric) - Closing price at the end of the period
• volume (numeric) - Number of shares or units traded during the period
• Size: 30-120 periods for clear visualization without overcrowding
• Example: Daily OHLC data with volume for a stock over 60 trading days

Notes

• Use a shared x-axis between the candlestick and volume panes with proper date formatting
• Volume bars should use the same up/down color scheme as candlesticks for visual consistency
• The price pane should occupy roughly 70-75% of the vertical space, volume pane 25-30%
• Include a crosshair or cursor that spans both panes for precise price/volume reading
• Grid lines should be subtle and aligned across both panes

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