score:0

you need to have your data sorted in ascending time order. currently your "large" data set is not.

score:0

there is a couple of problems. first of all, as said @wergeld, you need to sort your data:

chartdata.sort(function(a,b) { return a[0] - b[0]; });

then the problem is with setting option for navigator:

    navigator: {
        series: [{
            name: 'msft',
            data: chartdata
        }]
    },

when should be an object, not an array:

    navigator: {
        series: {
            name: 'msft',
            data: chartdata
        }
    },

and the last one, do you really need to set xaxis.min/max ? escpecially to values 2 and 4. when you have timestamps like

working demo: http://jsfiddle.net/yrygy/253/


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