Accepted answer

You need to specify the x axis values

data: [{
                y: 3,
                x: Date.UTC(2012, 9, 9)
                date: 'October 9th, 2012',
                unlocked: 1,
                potential: 1,
            }, {

You also need to drop the xaxis categories, and make the xa is type 'datetime' An example is here

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