<div id="chart">
      <div class="toolbar">
        <button @click="updateData('one_month')" id="one_month" :class="{active: selection==='one_month'}">1M</button>
        <button @click="updateData('six_months')" id="six_months" :class="{active: selection==='six_months'}">6M</button>
        <button @click="updateData('one_year')" id="one_year" :class="{active: selection==='one_year'}">1Y</button>
        <button @click="updateData('ytd')" id="ytd" :class="{active: selection==='ytd'}">YTD</button>
        <button @click="updateData('all')" id="all" :class="{active: selection==='all'}">ALL</button>
      </div>
      <apexchart type=area height=350 :options="chartOptions" :series="series" />
    </div>