kernc/backtesting.py

Chart Rendering seems incorrect

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#1,327 创建于 2025年10月26日

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 (1 评论) (0 反应) (0 负责人)Python (4,387 star) (863 fork)batch import
help wanted

描述

Expected behavior

When I am testing my strategy, I noticed the strategy was placing order at odd places on the charts. On the closer inspection, I think the OHLC rendering on the chart is incorrect

If you checked the time 10/17 21:05 PM

Correct data: Close = 1072.25

I expect to see the same data on chart.

Code sample

Actual behavior

Incorrect data rendered on chart: Close = 1071.192

Any idea on why this is happening? Is it due to some misalignment issue?

Additional info, steps to reproduce, full crash traceback, screenshots

No response

Software versions

  • backtesting.__version__: 0.6.5
  • pandas.__version__: 2.3.2
  • numpy.__version__: 2.2.6
  • bokeh.__version__: 3.8.0
  • OS: MacOS

贡献者指南

技术栈
python
领域
frontend
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
fresh
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
Python programmingUnderstanding of OHLC dataFamiliarity with bokeh
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
65
研究方向
Investigate the chart rendering code in the backtesting.py library, specifically how OHLC data is transformed and passed to bokeh. Check if there is a misalignment in data indexing or timezone conversion. Look at the relevant source files such as `backtesting/ plotting.py` or similar. Compare the actual data values from the user's screenshot with the data fed to the plot. Consider if there is a bug in the candlestick plot function (e.g., `plot candlesticks`).