public lineChartData:Array<any> = [
    {data: [79, 22, 87, 12], label:'Series A'}
  ];
  public lineChartLabels:Array<any> = ['January', 'February', 'March', 'April'];
  public lineChartOptions:any = {
    responsive: true,
    scales: {
            yAxes: [{
                ticks: {
                    beginAtZero: true
                }
            }]
        },
    annotation: {
        drawTime: 'beforeDatasetsDraw',
        annotations: [{
            type: 'box',
            id: 'a-box-1',
            yScaleID: 'y-axis-0',
            yMin: 0,
            yMax: 30,
            backgroundColor: '#f7d7db'
        }, {
            type: 'box',
            id: 'a-box-2',
            yScaleID: 'y-axis-0',
            yMin: 30,
            yMax: 70,
            backgroundColor: '#FFECD1'
        }, {
            type: 'box',
            id: 'a-box-3',
            yScaleID: 'y-axis-0',
            yMin: 70,
            yMax: 100,
            backgroundColor: '#e6f5f0'
        }]}
  };
  public lineChartColors:Array<any> = [
    { // grey
      backgroundColor: 'rgba(148,159,177,0.2)',
      borderColor: 'rgba(148,159,177,1)',
      pointBackgroundColor: 'rgba(148,159,177,1)',
      pointBorderColor: '#fff',
      pointHoverBackgroundColor: '#fff',
      pointHoverBorderColor: 'rgba(148,159,177,0.8)'
    }
  ];
  public lineChartLegend:boolean = false;
  public lineChartType:string = 'line';

this.accountService.getLast90DaysAccountHistory(this.currentUrl.request).subscribe(data => {
      if(!data){
        this.message = "No history for this account";
      }
      else{
        this.history = data;
      }
    });

{"last90Days":[1000,329.23,399.45,290.3,450.3,240.2,409.54,219.3,537.3,490.3]}