I have a chart as in following image. My data are in interval 50-51. But yAxis is started from 0. I didn’t set yAxis min value.
I can’t set static min and max values for yAxis because of single chart can display different data series with distinct min-max values.
I’d like yAxis in this example starts from 50 or 49 and ends with 51 or 52. And Higchcarts should do it automatically.
Any ideas?

Perhaps it would be better to do some pre-processing. If you data series are not “live” then you could parse through all the y-values in all series and get the min/max and then assign those to your yAxis min and max parameters.
If your data is “live” (updated every x seconds or something) then you will need to check the new value to see if it is within the min/max range and if not, then assign a new min or max.