Grouping multiple lines for a single indicator

[arotabi]

Question

First of all - thank you for creating this!
I'm in the process of migrating my ugly Plotly charts to lightweight-charts :)

Is it possible to group multiple lines/plots for a single indicator?
For example, the upper and lower lines for an EMA channel to be grouped together.

Code example

No response

[louisnw01]

Hey @arotabi,

I think this is a good idea; I'm curious if you have any ideas about how the syntax of this feature could work?

Louis

[arotabi]

Hey @louisnw01,

I think the simplest way might be to introduce the option of 'group_name' to chart.create_line().
So for example
chart.create_line(name='df_line_1', color='...', style='...', width=1, price_line=False, price_label=False)

would become:
chart.create_line(group_name='my_indicator_name', name='df_line_1', color='...', style='...', width=1, price_line=False, price_label=False)
chart.create_line(group_name='my_indicator_name', name='df_line_2', color='...', style='...', width=1, price_line=False, price_label=False)

Must admit, I have no idea how hard this might be to implement or if TV's lightweight charts even allows for grouping.

Thanks,
AR

[dalklein]

This could be great for pairs or sets of lines, such as Bollinger bands.