diff --git a/domainlab/algos/trainers/fbopt_setpoint_ada.py b/domainlab/algos/trainers/fbopt_setpoint_ada.py
index e7dede900..a789a1ccc 100644
--- a/domainlab/algos/trainers/fbopt_setpoint_ada.py
+++ b/domainlab/algos/trainers/fbopt_setpoint_ada.py
@@ -9,7 +9,7 @@ def list_add(list1, list2):
 
 def list_multiply(list1, coeff):
     return [ele * coeff for ele in list1]
-    
+
 def is_less_list_any(list1, list2):
     """
     judge if one list is less than the other
@@ -71,8 +71,10 @@ def observe(self, epo_reg_loss, epo_task_loss):
         read current epo_reg_loss continuously
         FIXME: setpoint should also be able to be eliviated
         """
-        self.state_epo_reg_loss = list_add(list_multiply(epo_reg_loss, self.coeff_ma_output),  list_multiply(self.state_epo_reg_loss, 1 - self.coeff_ma_output))
-        self.state_task_loss = epo_task_loss
+        self.state_epo_reg_loss = [self.coeff_ma_output*a + ( 1-self.coeff_ma_output )*b if a != 0.0 else b for a, b in zip(self.state_epo_reg_loss, epo_reg_loss)]
+        if self.state_task_loss == 0.0:
+            self.state_task_loss = epo_task_loss
+        self.state_task_loss = self.coeff_ma_output * self.state_task_loss + (1-self.coeff_ma_output) * epo_task_loss
         if self.state_updater.update_setpoint():
             logger = Logger.get_logger(logger_name='main_out_logger', loglevel="INFO")
             self.setpoint4R = self.state_epo_reg_loss