Fire Facebook Pixel on second order

fire_fb_pixel_nvujnich.php

<?php
/*
 * Fire Facebook Pixel on second order
 */
function fire_fb_pixel( $MemberOrder ) {
	global $wpdb;
	$orders = $wpdb->get_results("SELECT o.*, UNIX_TIMESTAMP(o.timestamp) as timestamp, l.name as membership_level_name FROM $wpdb->pmpro_membership_orders o LEFT JOIN $wpdb->pmpro_membership_levels l ON o.membership_id = l.id WHERE o.user_id = '$MemberOrder->user_id' AND o.subscription_transaction_id = '$MemberOrder->subscription_transaction_id' ORDER BY timestamp DESC");
	$transactionCount = count( $orders );
	
	if( $transactionCount == 2 ) {
		//fire pixel
	}
}
add_action( 'pmpro_added_order', 'fire_fb_pixel', 10, 1 );