[Vuejs]-Bind different series in apex chart using vue.js for

You can see in documentation https://apexcharts.com/docs/options/series/

Accepts an array of [name, data] object…

So you need to pass an array

<apexchart type="bar" height="100%" :options="chartOptionsRealTime" :series="[seriesRealTime[0]]"></apexchart>