Feature Request: Ability to overlay a candle chart over another (share axes)

[GAEfan]

Thank you for your work on updating mplfinance!

Using the deprecated mpl-finance, I was able to put 2 candlestick_ohlc() charts on top of each other (overlaid, sharing the same axes), and a table below the chart, all within a single figure that could be saved.

Now, I can use returnfig=True to export the figure and axes, but not sure how to actually use those later. ax is not a valid kwarg in plot(), as it was in candlestick_ohlc(). And not sure how to draw the chart inside a parent figure. Should fig be a kwarg for plot()?

Thank you.

[DanielGoldfarb]

Ability to create and pass in your own Figure and Axes is coming. Maybe another 4 to 6 weeks. In the meantime, you may be able to use the Figure and Axes that are returned from returnfig=True kwarg.

I'd like to see an example of an two overlayed candle charts, if you could point me to an example that would be great. Thanks.

[GAEfan]

Hi Daniel,

Thank you for the prompt response. Yes, I can gather Figure and Axes from returnfig=True. However, how do I tell the second mfp.plot() to use the same axes? ax= is not yet part of the kwargs.

Here is an example of candles sharing the same axes via overlay. It is from a machine learning prediction machine:

[GAEfan]

This can be handled with a couple of lines of code:

In _valid_plot_kwargs():

'fig'         : { 'Default'     : None,
                  'Validator'   : lambda value: isinstance(value,object) },

In plot():

fig = config['fig'] or plt.figure()

[DanielGoldfarb]

@GAEfan --

Do you have a working version of the code, with this change, that does the overlay that you want with mplfinance? I would like to look at it.

[DanielGoldfarb]

@GAEfan

Thank you for the prompt response. Yes, I can gather Figure and Axes from returnfig=True. However, how do I tell the second mfp.plot() to use the same axes? ax= is not yet part of the kwargs.

There have been a number of enhancements since this issue was first posted.

There now is kwarg ax= which you can use. So you can do:

fig, axlist = mpf.plot(df1,...,returnfig=True)

mpf.plot(df2,ax=axlist[0])

Please let me know if this is an adequate solution for your issue, or if we can do something else for you.
For more information see https://github.com/matplotlib/mplfinance/wiki/Acessing-mplfinance-Figure-and-Axes-objects

Thank you. All the best. --Daniel