{
  "elements":[
    {
      "type":      "line",
      "colour":    "#736AFF",
      "text":      "Avg. wave height (cm)",
      "font-size": 10,
      "width":     1,
	  "dot-style": {
				"type":"bow", "dot-size": 6, "tip":"#val#<br>#x_label#" },
    
      "values" :   [3,0,-3]
    }
  ],

  "y_axis":{
	  "min": -5,
    "max":   5
  }

}