how to get y axis values of multiple series in plotoption while using highcharts?

I am currently using Highcharts library for displaying data in graphical format. In current scenario i need to show column chart(current values) with a line showing the average values for the corresponding column. also i need to show upward and downward arrows depending if the actual value is greater than the average value and downwards arrow otherwise. i have average and actual values in 2 different series.

most of the things i have done however i am not able to get the values of actual vs average in the plotoption section of the highchart. once i have these values, i can decide and show correct arrow over the column.

can someone help?

plotOptions: {
            column: {
                dataLabels: {
                    enabled: true,
                    useHTML: true,
                    shared:true,
                    formatter: function(args) {
        //trying to put condition here for the upward and downward arrow.                                 
        return '<div ><div class="tolerenceDown" ></div></div>';            
                    },

https://jsfiddle.net/sanket_bhalerao/fupggsy2/6/