         followCursor: true,
              intersect: false,
              shared: true,
            },
            dataLabels: {
              background: {
                enabled: true,
              },
              formatter(val, opts) {
                const seriesName = opts.w.config.series[opts.seriesIndex].name
                return val !== null ? seriesName : ''
              },
            },
            yaxis: {
              show: true,
              labels: {
                show: true,
     