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feat: candlestick chart support CandleMarkerPainter
Hi, I've made improvements and refinements based on the feedback from the previous PR.
Feature Summary
This PR adds a candle marker system to CandlestickChart for marking trading signals on candlestick charts.
Key Features:
- CandleMarkerPainter - Abstract base class for custom candle marker implementations
- BuyAndSellSignalPainter - Built-in implementation with flexible condition-based signal detection, customizable bubble styles and labels to easily extend various trading signal scenarios
Can I draw a line to show trade indicators? Something like this: