acme_chart 1.0.7

A financial charting library for Flutter applications, offering a comprehensive suite of features for technical analysis and trading visualization.

1.0.7

September 11, 2026

• Exported VisibleEntries so implementers can reference it when overriding SingleIndicatorSeries.

1.0.6

September 5, 2026

• Added Chart.chartTimeConfig for configuring the timezone (utcOffset) used across axis, crosshair, and drawing-tool time labels, instead of always forcing UTC.
• Added custom label builder callbacks on ChartTimeConfig for the x-axis and crosshair, so implementors can fully customize the displayed time format (e.g. always show seconds).

1.0.5

September 3, 2026

• Added BasicChart.showQuoteGrid / IndicatorConfig.showQuoteGrid: lets an individual pane hide its y-axis quote grid (lines + labels) independently of the shared ChartAxisConfig.showQuoteGrid setting.
• Added tap interactivity: BasicChart now detects taps and forwards them to the pane's series via the new Series.onTap(Offset localPosition) method, letting series subclasses handle taps on drawn regions.
• Migrated to material_ui.

1.0.4

August 27, 2026

• Added Series.axisGroup: an overlay series can now be scaled on its own value range instead of the shared price axis, while still rendering layered over the candles. null (default) shares the main price axis; a non-null value scales independently, and overlay series sharing the same axisGroup value share one combined scale — so unrelated indicators with very different ranges (e.g. a 0-10-bounded oscillator and a MACD-scale signal) don't distort each other.
• Fixed MinMaxCalculator treating a NaN entry (e.g. an indicator's not-yet-warmed-up values) as the largest key in its sorted map, silently corrupting Series.maxValue/minValue for the whole visible frame whenever any NaN entry was in view.
• Fixed slow, erratic typing when editing "Notes" drawing tool text boxes.

1.0.3

August 26, 2026

• Added new interactive drawing tools: Rectangle, Channel, Notes, Ellipse, Fibonacci Retracement, Fib Fan, Trade Ratio, Doodle, Segment, and Measure.
• Added magnet snapping for drawing tools via the new magnetEnabled property on ChartConfig.
• Added a copy button for drawings and improved trend line interaction handling.
• Updated line and label drawing tool configs to default to blue styling.
• Removed unused overlay style JSON serialization methods.

1.0.2

August 25, 2026

• Added StochasticOscillatorIndicatorConfig and its indicator item (Fast/Slow Stochastic Oscillator).
• Added FunctionIndicator and MemoizedResult for supplying custom bulk math computations to indicator series.
• Exported ChannelFillPainter from chart_series.
• Fixed indicator series repaint logic to also honor super.shouldRepaint.
• Fixed a null-safety issue where followCurrentTick was checked before confirming width was non-null.

1.0.1

June 12, 2026

• Improved pub score

1.0.0

June 12, 2026

• Initial release of acme_chart.
• Candlestick and line chart types via CandleSeries and LineSeries, with configurable CandleStyle and LineStyle.
• Overlay indicators (share the main y-axis) and bottom indicators (independent y-axis) via overlayConfigs and bottomConfigs.
• 50+ technical indicators including RSI, MACD, Bollinger Bands, Ichimoku Cloud, Parabolic SAR, ADX, Stochastic (Fast/Slow/SMI), ATR, Aroon, CCI, Williams %R, ROC, DPO, Gator Oscillator, Donchian Channel, ZigZag, and all major moving averages (SMA, EMA, DEMA, TEMA, WMA, HMA, LSMA, TRIMA, MMA, VMA, WWSMA, ZELMA).
• Annotations support: HorizontalBarrier, VerticalBarrier, and TickIndicator, with customizable styles and visibility modes.
• Interactive drawing tools (trend lines, channels, Fibonacci retracements, and more).
• Trade markers via MarkerSeries with support for up/down markers, active markers, and entry/exit tick markers.
• AcmeChart widget - batteries-included wrapper with built-in UI for adding, removing, and configuring indicators and drawing tools, with automatic persistence via shared_preferences.
• ChartController for programmatic scroll (scrollToLastTick) and zoom (scale).
• Built-in dark and light themes that automatically follow Theme.of(context).brightness; extend ChartDefaultDarkTheme or ChartDefaultLightTheme to customise.
• Localization support via ChartLocalization.delegate and ChartLocalization.load.
• Callbacks: onVisibleAreaChanged (left/right epoch bounds) and onCrosshairAppeared.
• Performance optimisations: binary search for visible data, per-index indicator value caching via acme_indicators.