Superimposed Charts

[kaleming]

Hi @kernc,

I found very cool this option you provide to visualize superimposed charts.

I would like to know, if it is possible to accomplish other time frames combinations as well ? (1 min & 5 min / 3 min & 15 min / 5 min & 15 min). Even if I had to provide df1 and df2 already resampled.

[kernc]

You could, e.g., resample original df to '3T' (3 min) and pass bt.plot(..., superimpose='15T')?

Other than that, you could roll as many as you want of your own line indicators:

        ...
        def resample(period, df):
            return df.Open.resample(period).first(), df.Close.resample(period).last()
        self.resampled15t = self.I(resample, '15T', self.data.df, overlay=True)
        ...

[kaleming]

Hi @kernc, thanks for your reply.

It seems to be working now.

I just have a doubt.

• I noticed when using 3T with 15T, I can' t visualize only the higher frame when scroll to zoom in, zoom out (in your example with daily data I can see only the higher frame when I zoom in, zoom out). It it possible to modify the colors_lighter parameter to make it easy to visualize the higher frame as well?

[kernc]

If you're as zoomed out to not distinguish the superimposed bars, you won't distinguish the main bars if you make the superimposed colors any less light. I think the defaults are reasonable.

You can quite easily change the colors in your own copy, at this place:

backtesting.py/backtesting/_plotting.py

Lines 474 to 475 in 7671f04

	colors_lighter = [lightness(BEAR_COLOR, .92),
	lightness(BULL_COLOR, .92)]

I'd appreciate a screenshot. 😜

[kaleming]

Hi @kernc, thanks again.

During the zoom in transition using your website example with daily and monthly superimposed data, it appears good as below:

When I try to zoom in my 3T / 15T chart, the transition appears like this:

Although both of them works fine after finish zooming transition:

I will try to change some lightness parameters just to see if works fine for my case.

Thanks a lot for your help;

[kaleming]

I will probably explore some combination like this:

[kernc]

When I try to zoom in my 3T / 15T chart, the transition appears like this:

Although both of them works fine after finish zooming transition

The level-of-detail change is from Bokeh:

the plot only draws a small fraction of data points during interactive operations (panning or zooming, for example)

[kaleming]

Thanks again @kernc . I didn`t know about these parameters.
I will have a look on that.