The scenario is very simple. Data range for the gauge could be very different, so we can set some hardcoded values for the min and max properties. Now we for the min and max we set minimum and maximum from our value, but in this case we have not very beautiful labels, i.e. 90 is min and 165 is max, we show 10 labels so labels are 90, 98,33, 106,67 etc.