Feature request - Non-incremental steps

[ghost]

It would be handy if the steps could be a pre determined array.

When an array is provided it could just be 7 steps as below that go from point to point.

steps: [0, 5, 10, 25, 50, 100, 200]

[stbaer]

Sorry for the late reply, I'll consider it if you make a PR ;)