Candlestick graph type

[tracerstevens]

Has anyone considered contributing a candlestick graph type?

[etimberg]

@tracerstevens there isn't one in the core. I think this is a good opportunity for a chart type that could live in an external repository since it's more specific

[tracerstevens]

Sounds good, if I wanted to give it a try, what files would I generally be touching?

[etimberg]

@tracerstevens you're probably going to want to start with the controllers: https://github.com/chartjs/Chart.js/tree/master/src/controllers

You'd need a controller for the new chart type. You'd also probably want a new element since the basic rectangle one won't do: https://github.com/chartjs/Chart.js/tree/master/src/elements

[etimberg]

Closing since we will not ship this type of chart in the core. The best solution is to create a new chart type for this.

[ajp8164]

Any progress on a candle chart? (even if not core)

[KoalaBear84]

I'm also curious if there is any news about this.

[mce1978]

Same here, I am really interested in his kind of chart. Anyone who has done it or should i try myself?

[benmccann]

In my experience candlestick charts are very popular and widely supported, and not at all niche or specific. I did a survey of a dozen other JS charting libraries as seen below and candlestick charts seemed to be very popular. Additionally, candlestick charts are supported in all major spreadsheet programs such as Excel, Google Spreadsheets, and LibreOffice.

• Chartist.js - love candlestick charts, but waiting for 1.0
• FusionCharts - supported
• dygraphs - demo in docs and support via extras
• Google Charts - supported
• Highcharts - supported
• Flot - experimental
• nvd3 - supported
• CanvasJS - supported
• plotly - supported
• ZingChart - supported
• amCharts - supported
• EJS Chart - supported

I understand that chartjs wants to support only very core charts and doesn't want to open the flood gates to every random and super specific request that comes in. At the same time, I think candlestick charts are so common that it may make sense to consider supporting in some manner. I'd like to see a pathway for such a common chart to make it into the core project perhaps starting as an external chart. In the meantime, is there some other way for a candlestick plugin to become officially recognized such as living under the chartjs organization?

[etimberg]

@benmccann we're happy to have someone write and maintain a candlestick plugin that could live in the chartjs organization. I would say that the best way to get started on something like that would be to create the chart and get it working well, then we can find a way to transfer the repository into the organization.

[benmccann]

@mce1978 were you going to try this? I don't think anyone else has worked on it to answer your question

The floating bar chart has some similarity to the candlestick chart and potentially could be a good place to start: #4120

[benmccann]

Thanks @etimberg !

[benmccann]

We have a candlestick chart now: https://github.com/chartjs/chartjs-chart-financial

Feedback welcome