diff --git a/call.py b/call.py
index 57e2d0a..0a5a984 100644
--- a/call.py
+++ b/call.py
@@ -11,6 +11,16 @@ class Call(ModelSQL, ModelView):
 
     prospect_trace = fields.Many2One('sale.prospect_trace', 'Prospect track')
 
+    interest_types = [
+        ('0', '0 - No contestó'),
+        ('1', '1 - total desinterés'),
+        ('2', '2 - Interés intermedio'),
+        ('3', '3 - Interés alto, generar venta')
+    ]
+
+    interest = fields.Selection(interest_types, 'Interest')
+
+
     @classmethod
     def default_date(cls):
         return date.today()
\ No newline at end of file
diff --git a/prospect_trace.py b/prospect_trace.py
index 19ae1fc..f0a91f5 100644
--- a/prospect_trace.py
+++ b/prospect_trace.py
@@ -12,11 +12,23 @@ class ProspectTrace(ModelSQL, ModelView):
     prospect_contact = fields.Many2One('prospect.contact_method', 'Contact method')
     prospect_city = fields.Char('City') 
 
-    calls = fields.One2Many('sale.call', 'prospect_trace', "Calls")
+    calls = fields.One2Many('sale.call', 'prospect_trace', "Calls") 
 
+    interest_types = [
+        ('0', '0 - No contestó'),
+        ('1', '1 - total desinterés'),
+        ('2', '2 - Interés intermedio'),
+        ('3', '3 - Interés alto, generar venta')
+    ]
+
+    current_interest = fields.Function(fields.Selection(interest_types, 'Interest'), '_get_current_interest')
+    
     @fields.depends('prospect')
     def on_change_prospect(self):
         if self.prospect:
             self.prospect_name = self.prospect.name
-            # self.prospect_contact = self.prospect.contact_methods.index('contact_type 'mobile')
             self.prospect_city = self.prospect.city
+
+    def _get_current_interest(self, name):
+        return self.calls[-1].interest
+        
diff --git a/tests/scenario_sale_opportunity_management.rst b/tests/scenario_sale_opportunity_management.rst
index efdf81b..aef6d08 100644
--- a/tests/scenario_sale_opportunity_management.rst
+++ b/tests/scenario_sale_opportunity_management.rst
@@ -128,6 +128,7 @@ Crear llamada a un seguimiento de prospecto::
 
     >>> call.description = 'Descripción u observaciones de la llamada'
     >>> call.prospect_trace = prospect_trace
+    >>> call.interest = '1'
     >>> call.save()
 
     >>> call.prospect_trace.prospect_name
@@ -141,6 +142,7 @@ Crear otra llamada al mismo seguimiento de prospecto::
 
     >>> call.description = 'Segunda llamada al mismo seguimiento'
     >>> call.prospect_trace = prospect_trace
+    >>> call.interest = '2'
     >>> call.save()
 
     >>> call.prospect_trace.prospect_name
@@ -149,8 +151,11 @@ Crear otra llamada al mismo seguimiento de prospecto::
     'Bogotá'
     >>> call.date == date.today()
     True
+
     >>> len(prospect_trace.calls) == 2
     True
+    >>> prospect_trace.current_interest
+    '2'
 
 --------
 Reportes