Display latest data as a pointer on axis in Highchart

You can assign an annotaion to every last point and move them outside a plot area in render event:

chart: {
  ...,
  events: {
    render: function() {
      this.annotations[0].labels.forEach(function(label) {
        label.graphic.attr({
          x: this.plotLeft + this.plotWidth
        });
      }, this);
    }
  }
},
annotations: [{
  labelOptions: {
    padding: 5,
    align: 'left',
    overflow: 'none',
    verticalAlign: 'middle',
    allowOverlap: true,
    text: '{point.y:.2f}',
    y: 0,
    x: 10
  },
  labels: [{
    point: 's1LastPoint'
  }, {
    point: 's2LastPoint'
  }, {
    point: 's3LastPoint'
  }]
}]

Live demo: http://jsfiddle.net/BlackLabel/6m4e8x0y/4800/

API Reference:

https://api.highcharts.com/highcharts/chart.events.render

https://api.highcharts.com/highcharts/annotations