terval,
    categories:numberOfRequestsData.names,
    labels:{ enabled:false }
  },
  yAxis:{
    min:0,
    reversedStacks: false
  },
  plotOptions:{
    series:{
      stacking:'normal',
      groupPadding:0,
      pointPlacement:'on',
      shadow: true
    }
  },
  legend: {
      borderWidth: 0,
      itemStyle: { fontWeight: "normal" },
      symbolRadius: 0
  },
  series:[
      {
      name:'OK',
      data:numberOfRequestsData.oks,
      color:"#68b65c"
    },
    {
      name:'KO',
      data:nu