[depth-order-book] Order Book Depth Chart

[MarkusNeusinger]

New plot type request.

A market depth chart from an exchange order book: cumulative bid volume as a green step area rising to the left of the mid price, cumulative ask volume as a red step area rising to the right, with the bid-ask spread gap at the center, price on the x-axis and cumulative quantity on the y-axis, optionally annotated with mid price and spread.

Why: iconic chart in every trading and crypto exchange UI; finance is the largest domain family in the catalog (candlestick, ohlc, renko, kagi, point-and-figure, six indicator specs) yet the depth chart is missing. A snapshot of an order book is fully static-renderable.

[claude]

✅ Spec ID: depth-order-book

Rationale: A market depth chart is an iconic, distinct finance visualization (cumulative bid/ask step areas around the mid price) not covered by any existing finance spec (candlestick, ohlc, renko, kagi, point-and-figure, indicators) — those plot price over time, while this plots cumulative quantity over price for a single order-book snapshot.

Valid and fully static-renderable. Add label approved to begin generation.

[github-actions]

✅ Specification Ready: ${SPEC_ID}

PR: #$PR_NUMBER

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specification.md

$SPEC_CONTENT

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Next: Add approved label to merge this specification to main.

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🤖 spec-create workflow

[github-actions]

🚀 Specification Merged!

Specification: ${SPEC_ID}
PR: #$PR_NUMBER (merged)

The specification is now in main and synced to PostgreSQL.

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Next: Add generate:{library} labels to start generating implementations.

Available libraries: matplotlib, seaborn, plotly, bokeh, altair, plotnine, pygal, highcharts, letsplot

Or use workflow dispatch for bulk operations.

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🤖 spec-create workflow