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The border of the markers.

series.markers.border

Object|Function
<div id="stock-chart"></div>
<script>
$("#stock-chart").kendoStockChart({
    dataSource: {
        data: [
            { date: new Date(2023, 1, 1), value: 100 },
            { date: new Date(2023, 1, 2), value: 105 },
            { date: new Date(2023, 1, 3), value: 98 }
        ]
    },
    categoryField: "date",
    series: [{
        type: "line",
        field: "value",
        markers: {
            visible: true,
            border: {
                color: "#000",
                width: 2
            }
        }
    }]
});
</script>

The color of the border.

Default: "black"

<div id="stock-chart"></div>
<script>
$("#stock-chart").kendoStockChart({
    dataSource: {
        data: [
            { date: new Date(2023, 1, 1), value: 100 },
            { date: new Date(2023, 1, 2), value: 105 },
            { date: new Date(2023, 1, 3), value: 98 }
        ]
    },
    categoryField: "date",
    series: [{
        type: "line",
        field: "value",
        markers: {
            visible: true,
            border: {
                color: "#ff6800"
            }
        }
    }]
});
</script>

The width of the border.

Default: 0

<div id="stock-chart"></div>
<script>
$("#stock-chart").kendoStockChart({
    dataSource: {
        data: [
            { date: new Date(2023, 1, 1), value: 100 },
            { date: new Date(2023, 1, 2), value: 105 },
            { date: new Date(2023, 1, 3), value: 98 }
        ]
    },
    categoryField: "date",
    series: [{
        type: "line",
        field: "value",
        markers: {
            visible: true,
            border: {
                width: 3
            }
        }
    }]
});
</script>