[[+value]] и [[+dates]]

<?php
$dates= array();
$values = array();

foreach($content_currency->Record as $currency) {
    $dates[] = '"'.(string)$currency->attributes()->Date.'"';
    $values[] = str_replace(',', '.', $currency->Value);
}

$modx->setPlaceholders(array(
    'dates' => implode(', ', $dates),
    'values' => implode(', ', $values),
));

return;

//..........
series: [
    {
      name: "Курс",    
      data: [ [[+values]] ]
    }
  ],
  xaxis: {
    categories: [ [[+dates]]  ]
  },
//..........

<div id="chart" style="max-width: 760px; margin: 35px auto; opacity: 0.9;">
  <div id="responsive-chart"></div>
</div>

<script src="https://cdn.jsdelivr.net/npm/apexcharts"></script>
<script>
    var options = {
  chart: {
    width: "100%",
    height: 380,
    type: "area"
  },
  plotOptions: {
    bar: {
      horizontal: true
    }
  },
  dataLabels: {
    enabled: false
  },
  fill: {
          type: 'gradient',
          gradient: {
            shadeIntensity: 1,
            inverseColors: false,
            opacityFrom: 0.5,
            opacityTo: 0,
            stops: [0, 90, 100]
          },
  series: [
    {
      name: "Курс",    
      data: [<?php echo implode(', ', $currencyArr[1]); ?>]
    }
  ],
  xaxis: {
    categories: [<?php echo implode(', ', $currencyArr[0]); ?>]
  },
  title: {
          text: 'Динамика курса доллара США',
          align: 'left'
        },
        stroke: {
          curve: 'straight'
        },
  legend: {
    position: "right",
    verticalAlign: "top",
    containerMargin: {
      left: 35,
      right: 60
    }
  },
  responsive: [
    {
      breakpoint: 1000,
      options: {
        plotOptions: {
          bar: {
            horizontal: false
          }
        },
        legend: {
          position: "bottom"
        }
      }
    }
  ]
};

var chart = new ApexCharts(
  document.querySelector("#responsive-chart"),
  options
);

chart.render();

</script>

<?php
$dates= array();
$values = array();

foreach($content_currency->Record as $currency) {
    $dates[] = '"'.(string)$currency->attributes()->Date.'"';
    $values[] = str_replace(',', '.', $currency->Value);
}
echo implode(', ', $dates);
echo implode(', ', $values);
return;

<?php echo implode(', ', $currencyArr[1]); ?>
<?php echo implode(', ', $currencyArr[0]); ?>

foreach($content_currency->Record as $currency) {

	$content_currency_result[0][] = '"'.(string)$currency->attributes()->Date.'"';
	$content_currency_result[1][] = str_replace(',', '.', $currency->Value);

}
	return $content_currency_result;
}

<?php echo implode(', ', $currencyArr[1]); ?>
  <?php echo implode(', ', $currencyArr[0]); ?>

<script>
	function credit() {
	tinkoff.create(
    {
      sum: {$total.cost},
      items: [
    		{foreach $products as $product}	{ name: '{$product.pagetitle}', price: {$product.price}, quantity: {$product.count} }, {/foreach}
    		]
    ,
      promoCode: 'default',
      shopId: 'cornu',
      showcaseId: 'cornu',
    },
 {ignore}   {view: 'newTab'} {/ignore}
  )
	}
</script>