diff --git a/market/v1/msg.proto b/market/v1/msg.proto
index 9dd42cb..cced1d1 100644
--- a/market/v1/msg.proto
+++ b/market/v1/msg.proto
@@ -122,6 +122,18 @@ message NewMarketReq {
   optional bool accepted_contract = 10;
 }
 
+enum MarketOrdersSortBy {
+  MO_UNKONWN = 0;
+  MO_CREATED_AT_ASC = 1;
+  MO_CREATED_AT_DESC = 2;
+  MO_UNIT_PRICE_ASC = 3;
+  MO_UNIT_PRICE_DESC = 4;
+  MO_TOTAL_PRICE_ASC = 5;
+  MO_TOTAL_PRICE_DESC = 6;
+  MO_AVAILABLE_AMOUNT_ASC = 7;
+  MO_AVAILABLE_AMOUNT_DESC = 8;
+}
+
 message OrderListFilter {
   optional auth.v1.InternalIAM iam = 1;
   base.v1.BaseQueryParam base = 2;
@@ -140,5 +152,5 @@ message OrderListFilter {
   optional uint64 source_order_id = 15;
   optional string from_date = 16;
   optional string to_date = 17;
-  optional string min_available_amount = 18; 
+  optional MarketOrdersSortBy sort_by = 18;
 }