Art’s Charts draws live ticks and history on an open rendering canvas and computes every study on the server. The chart says exactly what it computed, from SMA(50bd) to AVWAP(T@14:00), and your drawings stay put when the window resizes or the theme changes.
The rendering library is only a canvas, with no indicator math, drawing tools or picker. Art’s Charts supplies all three and connects them to your own data.
A Polars registry builds each study as expressions with declared dependencies, so shared rolling calculations are computed once and reused across studies.
Studies are expressions, not dialogs. Business-day windows such as SMA(50bd) use prior business-day closes plus the running bar, so intraday values stay live.
T@14:00, T-1bd@close, FQ0@openSession aliases @SOD and @EOD and trade-count anchors OBS-n resolve on the server against real session and trade data, not a client-side guess.
Completed periods come from the ticks_sip Delta tick vault; the current session streams from the kdb+ tick cache. EODHD history fills in when the vault has no data.
<count><unit>, such as 7m or 90mSix tools (anchor, segment, ray, Fibonacci, Gann and level) store geometry as scale-independent slopes rather than canvas pixels, so they survive resizes and theme flips.
Operator-supplied Python studies load from TA_STUDIES_DIR and appear through the /ta_studies endpoints, with line pens, widths and hatched band fills.
One surface replaces the tab-and-list picker. Search or scroll a grouped list on the left; set parameters on the right while the expression preview updates. EODHD parity is a badge on every row, and server-side-only studies are listed but marked, not silently missing.
We scanned the full text of John J. Murphy’s 596-page standard reference for every named indicator and chart construction, then set the list against the Art’s Charts study registry. Mention counts are our own measurements of how often each term appears, including the index and captions, so they show emphasis rather than exact usage. Figure counts are distinct figure labels: 235 across 18 chapters.
| Murphy’s term | Mentions | Art’s Charts study | Status |
|---|---|---|---|
| Moving averages (simple, exponential, weighted) | 259 | SMA EMA WMA | In catalog |
| Relative strength index | 144 | RSI | In catalog |
| Parabolic SAR | 104 | SAR | In catalog |
| MACD, with histogram | 104 | MACD | In catalog |
| Commodity channel index | 99 | CCI | In catalog |
| Rate of change | 95 | ROC | In catalog |
| On balance volume | 75 | OBV | In catalog |
| Stochastic (%K / %D) | 73 | STOCH | In catalog |
| Momentum | 69 | — | Not in v12 catalog |
| Directional movement (ADX, ±DI) | 49 | ADX | In catalog |
| Envelopes / trading bands | 41 | — | Not in v12 catalog |
| Bollinger Bands | 21 | BBANDS %B BandWidth | In catalog |
| Accumulation / distribution | 18 | — | Not in v12 catalog |
| Williams %R | 10 | WILLR | In catalog |
| Standard deviation | 9 | STDDEV | In catalog |
| Average true range | 8 | ATR | In catalog |
| Money flow index | 4 | MFI | In catalog |
Momentum, envelopes and accumulation/distribution were in the registry when the scan was made but are not in the v12.0.0 catalog; Keltner and Donchian channels and Chaikin Money Flow cover nearby ground. The catalog also carries studies beyond these 17 names, among them VWAP, anchored VWAP, StochRSI, Hull MA, Supertrend, Ichimoku, pivot points, TRIX, Awesome Oscillator, Ultimate Oscillator, Vortex and Choppiness. Parameter help in the study palette draws on the book’s guidance, for example shortening RSI to 7–9 days for wider swings.
| Term | Mentions | Data required |
|---|---|---|
| Open interest | 163 | Futures open-interest series |
| TICK | 125 | Exchange-wide up/down tick counts |
| TRIN / Arms index | 49 | Advancing and declining issues and their volume |
| Advance–decline line | 26 | Market breadth |
| McClellan oscillator | 25 | Market breadth |
| New highs / new lows | 21 | Market breadth |
| Put/call ratio | 9 | Options volume |
None of these can be computed from an open-high-low-close-volume bar. Open interest ranks second among the book’s indicator terms because the book is written largely around futures.
Published formulations differ materially and there is no independent reference implementation to test against, so the checks that back the other hand-written studies can’t be applied. A plausible-looking variant that can’t be verified is worse than a documented gap. It needs a chosen reference before it lands.
| Construction | Figure captions | Lightweight Charts | Art’s Charts |
|---|---|---|---|
| Bar chart (OHLC) | 16 | Native | Not yet exposed |
| Candlestick | 2 | Native | Shipping |
| Line chart | 2 | Native | Shipping |
| Histogram (volume, MACD) | — | Native | Shipping |
| Logarithmic / semilog scale | 4 | Native | Not yet exposed |
| Point & figure | 14 | None | Planned · second renderer |
| Market profile | — | None | Planned · second renderer |
| Equivolume | 1 | None | Planned · second renderer |
Point & figure, market profile and equivolume share one property: time is not on the x-axis. Point & figure advances a column on each price reversal, market profile plots volume at each price, and equivolume makes bar width equal to volume. Lightweight Charts indexes every series by time, so these go to a second, declarative renderer, with the data transform done on the server.
| Feature | Mentions | In Art’s Charts today |
|---|---|---|
| Cycles / periodicity | 368 | Not computed |
| Support / resistance levels | 336 | Draw with the Level tool |
| Trendlines | 324 | Draw with Segment or Ray |
| Triangles | 174 | Draw with two segments |
| Gaps (breakaway, runaway, exhaustion) | 137 | Not computed |
| Flags, pennants, wedges, rectangles | 133 | Draw with segments |
| Channels | 120 | Draw with parallel segments or rays |
| Fibonacci retracements and fan lines | 83 | Fibonacci tool |
| Percentage retracements | 78 | Draw with the Level tool |
| Double / triple tops and bottoms | 70 | Not detected |
| Head and shoulders | 63 | Not detected; draw the neckline with Segment |
| Elliott wave | 42 | Not detected |
By weight, trendlines, levels, channels, retracements and chart patterns are the bulk of the book. They are geometry over the price series rather than indicator columns. You can draw nearly all of them by hand today with the six drawing tools; nothing detects them automatically. Pattern detection is a separate, larger body of work that would need its own design.
Art’s Charts keeps a chart’s working layout separate from saved macros. A macro is an optional, named, reusable snapshot with notes; editing a layout never silently rewrites the macro it came from.
A saved macro lays out 30 independent one-day, five-minute charts. Interval, Range, Session and Layout bind across all 30 cards through shared parameter groups.
Parameter edits are staged. Nothing touches the chart or the shared dashboard until you press OK; Cancel discards the draft.
An optional MCP interface lets a model discover studies and layout macros, create a chart, capture a snapshot and run analysis on that capture. The private route has passed initialisation and tool-discovery checks.
Art’s Charts runs today inside the bdobb-v2 chart client and the openbb-docker backend. Packaging it as a standalone charting package is the next step, and it is labelled Planned until it ships.
| Piece | Scope | Status |
|---|---|---|
| Phase 1 · core viewer | Candles and volume, live ticks over the kdb+ WebSocket, SMA/EMA, VWAP and anchored VWAP, Bollinger Bands, RSI, MACD, ATR | Shipped · v12.0.0 |
| Phase 2 · interactivity | Drawing tools, comparison overlay, saved layouts per card | Shipped · v12.0.0 |
| Redesign | Multi-pane chart with watermark, command cluster, tool rail, study parser, catalog from GET /ta_registry, time anchors, business-day windows, regular-session veil (bdobb-v2 PR #116, openbb-docker PR #53, merged 17 Sep 2026) | Shipped · v12.3.0 |
| Card chrome follow-up | Inline symbol editor, stacked Range and Session rows, hero price with change pill (bdobb-v2 PR #126) | Open PR |
| Phase 3 · parity and extras | Remaining indicators, alerts, replay, snapshot and export | Planned |
| Standalone package | Art’s Charts installable on its own, outside bdobb-v2 | Planned |
Coverage today: 33 of the 121 studies in TradingView’s catalog, by name. Repositories are in the private bdobb-dev organisation (bdobb-v2, openbb-docker).