diff --git a/quickpay.transaction.inc b/quickpay.transaction.inc
index 0154eb3..d8724ad 100644
--- a/quickpay.transaction.inc
+++ b/quickpay.transaction.inc
@@ -240,6 +240,10 @@ class Quickpay {
 
     $data['autocapture'] = ($options['autocapture']) ? '1' : '0';
 
+    if (!empty($options['google_analytics_tracking_id'])) {
+      $data['autocapture'] = $options['google_analytics_tracking_id'];
+    }
+
     // Build the checksum.
     $data['checksum'] = $this->getChecksum($data);
 
@@ -553,6 +557,13 @@ class Quickpay {
       '#default_value' => $settings['accepted_cards'],
     );
 
+    $form['google_analytics_tracking_id'] = array(
+      '#type' => 'textfield',
+      '#title' => t('Google Analytics Tracking ID'),
+      '#description' => t('Tracking ID from Google Analytics which makes it possible to track conversions even with external payment window.'),
+      '#default_value' => $settings['google_analytics_tracking_id']
+    );
+
     $form['test_mode'] = array(
       '#type' => 'checkbox',
       '#title' => t('Test mode'),
@@ -978,7 +989,7 @@ class QuickpayTransaction extends QuickpayTransactionBase {
 }
 
 /**
- * Represents a scubscription.
+ * Represents a subscription.
  */
 class QuickpaySubscription extends QuickpayTransactionBase {
   /**