diff --git a/apps/wpm/filters.py b/apps/wpm/filters.py
index 6044c34a..c6237732 100644
--- a/apps/wpm/filters.py
+++ b/apps/wpm/filters.py
@@ -225,6 +225,7 @@ class BatchStFilter(filters.FilterSet):
     
 
 class MlogbwFilter(filters.FilterSet):
+    type = filters.CharFilter(label="in/out", method='filter_type')
     class Meta:
         model = Mlogbw
         fields = {
@@ -236,4 +237,13 @@ class MlogbwFilter(filters.FilterSet):
             "ftest": ["isnull"],
             "ftest__is_ok": ["exact"],
             "ftest__defect_main": ["exact"]
-        }
\ No newline at end of file
+        }
+
+    def filter_type(self, queryset, name, value):
+        if value:
+            if value == 'in':
+                return queryset.filter(mlogb__material_in__isnull=False)
+            elif value == 'out':
+                return queryset.filter(mlogb__material_out__isnull=False)
+            return queryset
+        return queryset.none()
\ No newline at end of file