linechart.def.jsonc

{
  "background-color" : "peachpuff",
  "graphs": [
    {
      // chart-definition
      "id": 0,
      "type": "line",
      "color": "darkblue",
      "showIndicator": true
    },
    {
      // add a horizontal line 
      "id": 1,
      "type": "hline",
      "color": "red",
      "data": 0, // data is a simple number, can be included in the options
      "mustShow": true
    },
    {
      // Vertical axis ruler
      "type": "vaxis",
      "format": "number",
      "datasets": "all", // data set (charts) to be analyzed, default "all"
      "range": "auto", // auto algorithm is used, "man": data given range is used.. In any case the min and max of the y values from the data is included as well.
      "data": [
        -2,
        50
      ] // data is an array of numbers that will be included in the range.
    },
    { // Horizontal axis ruler
      "type": "haxis",
      "format": "date", // x-values are used as Date values 
      "datasets": "0", // data set (charts) to be analyzed, default "all"
      "range": "auto", // auto algorithm is used, "man": data given range is used.. In any case the min and max of the y values from the data is included as well.
      "data": [ -2, 50 ] // data is an array of numbers that will be included in the range.
    }
  ]
}