Allow gauge to take negative/positive value, extending from a zero position
This example displays a gauge from -4 to +4. The series data value of 0.5 would ideally make the gauge colour the range from 0 to 0.5.
Correspondingly, a series data value of -0.5 would make the gauge colour the range from -0.5 to 0 (and in the example we would make that a green range).
Thanks for the good idea! Implemented in https://github.com/highcharts/highcharts/commit/fa07d08fa93a52f3cf232fb83e089cc01093c889, it will be out with the next release. See live demo at http://jsfiddle.net/highcharts/j99skchd/2/.
Yes, we're going into regression testing phase now. It can be expected late this week or the next week.
Tor Helland commented
Nice. Any pointers on when the next release is coming?