Chart.js line sample

Chart.js Option sample

var options = {}

var options = { scaleOverlay: true }

var options = {
  scaleOverlay: true,
  scaleOverride: true,
  scaleSteps: 15,
  scaleStepWidth: 10,
  scaleStartValue: -50
}

Note: Tooltip support: https://github.com/nnnick/Chart.js/pull/51