by default, if your values are bigger then defined max (or smaller then defined min), max and min is changed so that all the chart would fit to chart area. If you don't want this, set this option to true.

public bool ValuesStrictMinMax { get; set; }

Public Property ValuesStrictMinMax As Boolean

public:
property bool ValuesStrictMinMax {
	bool get ();
	void set (bool value);
}