Milton did a wonderful improvement of Grapher.

Consider the following expression:

((1 to: 20) collect: [ :v | 50 atRandom - 5.1 ]) plot

It produces:

As you can see, the horizontal bar is not in the 0 on the Y axis. And this is quite a problem actually. 

Excel does it much better. This is now fixed, in the last version of Roassal we have

Milton has implemented an optimization algorithm that identify the optimal minimum & maximum value on the axis, and the optimal number of ticks, to have a pleasant reading.

Enjoy!

Cheers,

Alexandre