Add TickDistance, AutoRange and Step to the line Chart like the Telerik RadChart.  When querying a web service and charting a dynamic/variable number of values, the current chart results in grid lines too close together and overlapping x-axis values.  This would space the grid lines and labels based on the number of values and available space.  This is from the RadChart documentation:

The TickDistance has to be used together with AutoRange. When AutoRange is set to True, the axis Step value is calculated depending on the data range, the available space and the TicksDistance value. Since TickDistance defines the minimal distance between two ticks, increasing its value will cause the Step value to be increased too.