score:1

you need to define count and type properties for each of the buttons:

rangeselector: {
    inputenabled: false,
    buttons: [{
            count: 1,
            type: 'minute',
            text: 'max'
        },
        ...
    ],
    ...
}

live demo: https://jsfiddle.net/blacklabel/anf3rzp4/

docs: https://www.highcharts.com/docs/stock/range-selector


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