diff --git a/fifa-calculator.py b/fifa-calculator.py
index d2389a4..1001e78 100644
--- a/fifa-calculator.py
+++ b/fifa-calculator.py
@@ -12,8 +12,8 @@ with open('spielplan_vorrunde.csv', newline='') as spielplan, open('team_rating.
 
     # offset for relative strength
     offset_rating = 0#min(ratings.values())-1
-    # standard deviation
-    std_dev = 1.9
+    # standard deviation source says 1.9, but this is very high
+    std_dev = 1.3
     # mean Goals per match
     mean_goals = 2.2
     
@@ -30,4 +30,8 @@ with open('spielplan_vorrunde.csv', newline='') as spielplan, open('team_rating.
         goals_home = max(0, round(random.gauss(mean_goals/2*relative_rating_home,std_dev/2)))
         goals_away = max(0, round(random.gauss(mean_goals/2*relative_rating_away,std_dev/2)))
 
-        print(row['Home Team'], row['Away Team'], str(relative_rating_home)+' : '+str(relative_rating_away), str(goals_home)+' : '+str(goals_away))
\ No newline at end of file
+        # output
+        print(row['Home Team'], row['Away Team'], str(relative_rating_home)+' : '+str(relative_rating_away), str(goals_home)+' : '+str(goals_away))
+    
+    # keep window open    
+    input()    
\ No newline at end of file