ohlcv_chart 1.0.0

Candlestick and market-depth charts for Flutter, with MA, BOLL and SAR overlays, MACD, KDJ, RSI, WR and CCI sub-charts, signal markers and interactive drawing tools.

1.0.0

• Initial release, extracted from an internal application module.
• KChartWidget: candlestick and line rendering, pinch zoom, fling scroll, long-press crosshair and info dialog, "now price" line with candle countdown, and an SVG watermark.
• Main-chart overlays MA, BOLL and SAR, selectable as a set.
• Secondary charts MACD, KDJ, RSI, WR and CCI, stacked.
• Drawing tools for trend, horizontal and vertical lines, with selection, dragging, colour and thickness editing, and add/remove callbacks.
• Buy/sell SignalEntity markers.
• DepthChart for bid/ask cumulative market depth with a long-press readout.
• ChartStyle, ChartColors and ChartTranslations for full visual and text customisation; DepthChartStyle, DepthChartColors and DepthChartTranslations for the depth chart.
• DataUtil.calculate computes every indicator in place over a candle list.
• Runs on iOS, Android, web, Windows, macOS and Linux. The zoom slider now appears only where there is no pinch gesture — web and desktop — where before a always-true platform check rendered it on mobile as well.

Fixed while extracting the module:

• DataUtil.calculate no longer throws on an empty candle list, so the chart can be built before the first candles arrive.
• Secondary charts scale to their true maximum when an indicator stays below zero. MACD and CCI in a sustained decline previously scaled against zero, because the running maximum was seeded with double.minPositive — a tiny positive number rather than a lower bound.
• SAR resets its acceleration factor identically on both trend reversals; the up-to-down reversal previously restarted one step too fast.
• The "now price" countdown timer starts and stops when showNowPrice changes, instead of only being read once when the chart is first built.