Values from multiple data sources cannot be assigned to y-axis labels

[hgschwibbe]

I like to show four data sources in one chart which leads to multiple problems. Its impossible to examine a value for a proper data sources because they have different number ranges. And the y-axis labels overlap each other.

For example, in the following screenshot I like to determine the data point that has been marked red marked. What is the value of this data point? Is it approx 220W, approx 80W or one of the overlapping axis labels that nobody can read?

From my point of view echarts is currently not able to render multiple data sources in a user friendly way.

There could be different approaches to fix it.

1. render y-axis labels in different columns to prevent overlapping
2. render y-axis labels in the colors of the data sources

and/or alternatively:

3. Render all data sources in a common value range: take the maximum value of all data sources for the upper limit, and the minimum value for the lower limit.

[uelpenich]

Have a look at issue https://github.com/ioBroker/ioBroker.echarts/issues/42#issue-874024872