diff --git a/enterprise_catalog/apps/api_client/algolia.py b/enterprise_catalog/apps/api_client/algolia.py
index 6387223b..c50361b4 100644
--- a/enterprise_catalog/apps/api_client/algolia.py
+++ b/enterprise_catalog/apps/api_client/algolia.py
@@ -20,16 +20,18 @@ class AlgoliaSearchClient:
     ALGOLIA_APPLICATION_ID = settings.ALGOLIA.get('APPLICATION_ID')
     ALGOLIA_API_KEY = settings.ALGOLIA.get('API_KEY')
     ALGOLIA_INDEX_NAME = settings.ALGOLIA.get('INDEX_NAME')
+    ALGOLIA_REPLICA_INDEX_NAME = settings.ALGOLIA.get('REPLICA_INDEX_NAME')
 
     def __init__(self):
         self._client = None
         self.algolia_index = None
+        self.replica_index = None
 
     def init_index(self):
         """
         Initializes an index within Algolia. Initializing an index will create it if it doesn't exist.
         """
-        if not self.ALGOLIA_INDEX_NAME:
+        if not self.ALGOLIA_INDEX_NAME or not self.ALGOLIA_REPLICA_INDEX_NAME:
             logger.error('Could not initialize Algolia index due to missing index name.')
             return
 
@@ -44,6 +46,7 @@ def init_index(self):
         self._client = SearchClient.create(self.ALGOLIA_APPLICATION_ID, self.ALGOLIA_API_KEY)
         try:
             self.algolia_index = self._client.init_index(self.ALGOLIA_INDEX_NAME)
+            self.replica_index = self._client.init_index(self.ALGOLIA_REPLICA_INDEX_NAME)
         except AlgoliaException as exc:
             logger.exception(
                 'Could not initialize %s index in Algolia due to an exception.',
@@ -51,7 +54,7 @@ def init_index(self):
             )
             raise exc
 
-    def set_index_settings(self, index_settings):
+    def set_index_settings(self, index_settings, primary_index=True):
         """
         Set default settings to use for the Algolia index.
 
@@ -66,7 +69,10 @@ def set_index_settings(self, index_settings):
             return
 
         try:
-            self.algolia_index.set_settings(index_settings)
+            if primary_index:
+                self.algolia_index.set_settings(index_settings)
+            else:
+                self.replica_index.set_settings(index_settings)
         except AlgoliaException as exc:
             logger.exception(
                 'Unable to set settings for Algolia\'s %s index due to an exception.',
@@ -78,18 +84,24 @@ def index_exists(self):
         """
         Returns whether the index exists in Algolia.
         """
-        if not self.algolia_index:
+        if not self.algolia_index or not self.replica_index:
             logger.error('Algolia index does not exist. Did you initialize it?')
             return False
 
-        exists = self.algolia_index.exists()
-        if not exists:
+        primary_exists = self.algolia_index.exists()
+        replica_exists = self.replica_index.exists()
+        if not primary_exists:
             logger.warning(
                 'Index with name %s does not exist in Algolia.',
                 self.ALGOLIA_INDEX_NAME,
             )
+        if not replica_exists:
+            logger.warning(
+                'Index with name %s does not exist in Algolia.',
+                self.ALGOLIA_REPLICA_INDEX_NAME,
+            )
 
-        return exists
+        return primary_exists and replica_exists
 
     def replace_all_objects(self, algolia_objects):  # pragma: no cover
         """
diff --git a/enterprise_catalog/apps/catalog/algolia_utils.py b/enterprise_catalog/apps/catalog/algolia_utils.py
index 855a93b6..3a75247d 100644
--- a/enterprise_catalog/apps/catalog/algolia_utils.py
+++ b/enterprise_catalog/apps/catalog/algolia_utils.py
@@ -4,6 +4,7 @@
 import time
 
 from dateutil import parser
+from django.conf import settings
 from django.core.cache import cache
 from django.db.models import Q
 from django.utils.dateparse import parse_datetime
@@ -53,7 +54,9 @@
 ALGOLIA_UUID_BATCH_SIZE = 100
 
 ALGOLIA_JSON_METADATA_MAX_SIZE = 100000
+ALGOLIA_REPLICA_INDEX_NAME = settings.ALGOLIA.get('REPLICA_INDEX_NAME')
 
+algolia_replica_index = f'virtual({ALGOLIA_REPLICA_INDEX_NAME})'
 
 # keep attributes from content objects that we explicitly want in Algolia
 ALGOLIA_FIELDS = [
@@ -183,6 +186,15 @@
         'desc(course_bayesian_average)',
         'desc(recent_enrollment_count)',
     ],
+    'replicas': [
+        algolia_replica_index
+    ],
+}
+
+ALGOLIA_REPLICA_INDEX_SETTINGS = {
+    'customRanking': [
+        'desc(duration)'
+    ],
 }
 
 
@@ -354,6 +366,7 @@ def configure_algolia_index(algolia_client):
     Configures the settings for an Algolia index.
     """
     algolia_client.set_index_settings(ALGOLIA_INDEX_SETTINGS)
+    algolia_client.set_index_settings(ALGOLIA_REPLICA_INDEX_SETTINGS, primary_index=False)
 
 
 def get_algolia_object_id(content_type, uuid):
diff --git a/enterprise_catalog/apps/catalog/tests/test_algolia_utils.py b/enterprise_catalog/apps/catalog/tests/test_algolia_utils.py
index 81ab4523..d4513d95 100644
--- a/enterprise_catalog/apps/catalog/tests/test_algolia_utils.py
+++ b/enterprise_catalog/apps/catalog/tests/test_algolia_utils.py
@@ -1058,7 +1058,11 @@ def test_configure_algolia_index(self, mock_search_client):
         """
         algolia_client = utils.get_initialized_algolia_client()
         utils.configure_algolia_index(algolia_client)
-        mock_search_client.return_value.set_index_settings.assert_called_once_with(utils.ALGOLIA_INDEX_SETTINGS)
+        mock_search_client.return_value.set_index_settings.assert_any_call(utils.ALGOLIA_INDEX_SETTINGS)
+        mock_search_client.return_value.set_index_settings.assert_called_with(
+            utils.ALGOLIA_REPLICA_INDEX_SETTINGS,
+            primary_index=False
+        )
 
     @ddt.data(
         (