[visualization-api] Get change in percentage between two points. Google Charts

[Al-Khedhir Al-Shadeedi]

I have the following chart that calculates premium for each month.

    <script type="text/javascript">
        google.load("visualization", "1", { packages: ["corechart"] });
        google.setOnLoadCallback(drawChart);
        function drawChart() {
    
    
    
            var options = {
                title: 'Monthly Total Production',
                curveType: 'function',
                legend: { position: 'bottom' },
                height: 600,
                vAxis: {
                    viewWindow: { min: 0 },
                    format: 'currency',
                },
    
    
    
    
            };
            $.ajax({
    
                type: "POST",
                url: "url",
                data: '{}',
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (r) {
                    var data = google.visualization.arrayToDataTable(r.d);
                    var chart = new 
google.visualization.LineChart($("#monthlyProductionChart")[0]);
                    var view = new google.visualization.DataView(data);
                    view.setColumns([0, 1, {
                        calc: "stringify",
                        sourceColumn: 1,
                        type: "string",
                        role: "annotation"
                    },]);
                    chart.draw(view, options);
                },
                failure: function (r) {
                    alert(r.d);
                },
                error: function (r) {
                    alert(r.d);
                }
            });
        }
    
    
    </script>



The chart displays total premium. Is there a way to show the difference in 
percentage between two points alongside the premium? I found a way in 
another post on how to show the percentage change, but that would replace 
the premium on the chart.


Thanks

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