for (var i$1 = 0; i$1 < series.length; i$1++) {
        var s$1 = series[i$1];
        for (var j$1 = 0; j$1 < s$1.data.length; j$1++) {
          if (s$1.data[j$1][2] > max) {
            max = s$1.data[j$1][2];