How to correctly track button clicks in Big Cartel (with Facebook pixel)

I'm stuck with setting up correctly FB pixel code, events like page view and content view work fine, but seems I missing something with tracking button clicks like "AdToCart" or "InitiateCheckout" events. Tried to play with a code, but didn't figure out it.

Here is the original code I tried to implement from Facebook for Add to Cart event.

<script>
<button id="button add-to-cart-button">AddtoCart</button>
<script type="text/javascript">
  $('#addToCartButton').click(function() {
    fbq('track', 'AddToCart', {currency: "EUR", value: {{ option.price }}});
  });
</script>

What am I doing wrong?