im_charts 0.2.0

Im Charts — A high-performance financial charting engine and professional trading terminal for Flutter.

Changelog

All notable changes to the im_charts package will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

0.2.0

Added

• Ultra-Easy Integration Suite:
  • ImChart.simple(candles: myCandles): Zero-boilerplate factory rendering an institutional interactive chart in just 3 lines of code with automatic controller and lifecycle management.
  • ImChart.live(candles: ..., liveTickStream: ...): Instant real-time live streaming charts connecting directly to WebSocket streams.
  • StaticChartDataSource: Turnkey in-memory data source accepting raw List<Candle> or List<Map<String, dynamic>> via StaticChartDataSource.fromMapList(...).
• Interactive On-Chart Trading Execution & Live Drag Badges:
  • Live floating drag telemetry chips displaying active price, delta percentage, estimated P&L in currency, and real-time Risk/Reward ratios while dragging order and TP/SL lines.
  • Comprehensive onOrderModified callback fired on drag completion across TradingChart and TradingScreen.
  • Added initialOrders, initialPositions, initialCandles, and initialShowVolumeProfile constructor parameters to TradingScreen.
  • Added setCandles(List<Candle> candles) to TradingChartController for instantaneous programmatic dataset updates.
• Brand Logo & Asset Modernization:
  • Institutional Quant Hexagonal Shield logo (3D dark glass and titanium beveled hexagon with glowing emerald/cyan candlesticks) deployed across documentation, web demo assets, and high-resolution favicons.

0.1.0

Added

• Institutional Trading Terminal:
  • TradingScreen turnkey trading terminal widget embedding primary toolbars, telemetry overlay header, drawing instruments, and high-performance canvas.
  • Row 1 primary toolbar: Symbol search dialog (Cmd+K), timeframe selector (1m to 1W), candle styles dropdown, technical indicators modal (fx), bar replay simulator, high-DPI camera snapshot, shortcuts modal, and theme settings.
  • Row 2 floating telemetry header: Symbol name, category tag (INDEX, EQ, CRYPTO), exchange badge, live dynamic LTP with color pulse, net change, and high-density OHLCV strip.
• 6 Candlestick Presentation Styles:
  • Standard Candlesticks, Hollow Candles, Heikin Ashi, Line Chart, Area Mountain Chart, and Western OHLC Tick Bars.
• Integrated Technical Indicators:
  • Overlay indicators: Exponential Moving Averages (EMA), Bollinger Bands (with configurable standard deviations), and Volume Weighted Average Price (VWAP with intraday anchor resets and volatility bands).
  • Visible Range Volume Profile (VRVP): Dynamic Point of Control (POC), 70% Value Area High (VAH) / Value Area Low (VAL), and buy/sell volume distribution.
  • Stacked Sub-Panes: RSI and MACD (MACD line, signal line, and color-coded zero-baseline histogram) with independent auto-scaling coordinate spaces.
• Multi-Zone Touch & Trackpad Scaling:
  • Native macOS & Windows trackpad pinch-to-zoom (centered at pointer).
  • 2-finger horizontal trackpad pan.
  • Vertical price scale drag with manual scale lock and interactive AUTO reset badge.
  • Horizontal time scale drag.
• Interactive Drawing Engine:
  • Trendline, Horizontal Line (with direct vertical drag and price badge update), Rectangle / Supply & Demand Zone Box (with 8 interactive corner and edge resize handles), Fibonacci Retracement, Long & Short Position Risk:Reward Boxes, and Measure Ruler.
  • Floating glassmorphic quick-action toolbar (DrawingActionToolbar) for color selection, stroke thickness, lock/unlock, and deletion.
  • Dual creation workflow: Click-and-Drag or Click-Move-Click with real-time rubber-band preview geometry.
• Visual Price Alerts & Direct Chart Trading:
  • ChartAlert: Draggable visual alert lines with price scale badges and crossing trigger callbacks.
  • ChartOrder: Interactive limit orders with stop-loss (SL) and take-profit (TP) bracket handles.
  • ChartPosition: Interactive open position badges with live unrealized P&L and 1-click close buttons.
  • Hover + button dropdown for instant order placement and alert creation at hovered price.
• Im Charts Brand Aliases:
  • First-class type aliases: ImChart, ImTradingScreen, ImChartsApp, ImChartController.
  • Institutional background canvas watermark typography (IM CHARTS • SYMBOL • TIMEFRAME • EXCHANGE).