I tested this before, but if i use this option the ColumnBar's with the lower value are very small.

I attached a Screenshot of the chart, i hope that explains better what i mean.

Maybe one possible approach could be if you set AxisRangeType  property. For example:

ultraChart1.Axis.X.RangeType =AxisRangeType.Automatic;

By this way you do not need to specify Max and Min Range values.

Let me know if you have any questions.

Thanks for your answer and your effort to create this sample ! It works for me and is doing that what i need :-)

I have a second question about BarLabels too.

I set the RangeMax of the Axis to 20, because i have mostly small values under 20, but sometimes the values can be very high.

If i have a value of 120 for example (and the RangeMax is 20), the BarLabel isn't visible anymore.

Is there a easy property to set or any other way to show the BarLabel on the Bar(s) with the higher values ?

Have you been able to resolve your issue ? Did you have a time to take a look at the attached sample ?
If you still have any concerns or questions I will be glad to help. If you need any additional assistance don’t hesitate to ask.

Here is the sample