highcharts draw datetime a week earlier - highcharts

Question

I'm drawing a stockChart with Highchart, here the last data set:
[1582844400000,32.65863464265468],
[1583449200000,29.571543938725608],
[1584054000000,18.869729784689593]
1584054000000 is Fri 13 March 2020
1583449200000 is Fri 6 March 2020
Now when I plot the graph, the last value is shown as Mon 9 March 2020. Which from what I understand is correct because is the default value for the properties startOfWeek.
So I set this:
xAxis: {
type: 'datetime',
startOnTick: true,
startOfWeek: 5
},
Thinking to set the week correctly to Friday, indeed it works, but it shows me Fri 6 with value 18,86 so it's Fri 13, but for some reason it a week before. If I set startIfWeek at 4, it shows me Th 12.

Answer 1

From docs page
startOfWeek: number
For dateTime axes, this decides where to put the tick between weeks. 0 = Sunday, 1 = Monday.
Defaults to 1.
I was testing with this example from documentation, and it seems that from 0 to 4 it goes up on same week, but for some reason from 5 and 6 it goes back to previous week. Maybe it sets the average distance so the tick is not too distant from origin date.
xAxis: {
startOfWeek: 6,
type: 'datetime',
labels: {
formatter: function () {
return Highcharts.dateFormat('%a %e %b', this.value);
}
}
},
series: [{
data: [29.9, 71.5, 106.4, 129.2, 144.0, 176.0, 135.6, 148.5, 216.4, 194.1, 95.6, 54.4],
pointStart: Date.UTC(2010, 0, 1),
pointInterval: 3 * 24 * 3600 * 1000
}]