[Solved]-Tooltip for series with different time intervals-Highcharts

use a formatter function for tooltip and return false if there is less than two points. example:

    tooltip: {
        shared: true,
        formatter: function(tooltip) {
            if (this.points.length < 2) {
                return false;
            }

            return tooltip.defaultformatter.call(this, tooltip);
        }
    }

live demo: http://jsfiddle.net/blacklabel/zrse9cdj/

api reference: https://api.highcharts.com/highcharts/tooltip.formatter