Time series chart. Plot multiple data sources

Hi, I would like to know if is there a way to bypass time series chart's number of series.

I have a a thing which may have several "children" and, when I click on it, I would like to see the temperature of all the children.

My problem is:

1) Number of children is not fixed so it might be 1 like 20

2) If it is over 8 I can't bind it to the widget

Is there a way to plot dozens of curves in the same chat?