DBChart component

I am creating a user -interface for a digital oscilloscope (from a probe
electric signals will be measered and displayed on the
screen).So,according to me, data must be stored in a database and
directly translated into coordinates and placed on the screen.I use the
DBChart component.Is this the right way or are there better methods for
this kind of applications? How can the data be translated in
coordinates?Please help me!