diff --git a/src/dashboard_model/service.py b/src/dashboard_model/service.py
index 98f4129..ef93016 100644
--- a/src/dashboard_model/service.py
+++ b/src/dashboard_model/service.py
@@ -40,6 +40,8 @@ async def get_model_data(*, db_session: DbSession, simulation_id: Optional[UUID]
 
     # Availability Factor (same as your first formula - this one is correct)
     availability = (main_calc_data.availability) * 100
+    
+    is_oh = (main_calc_data.sof >= 10) 
 
     # Equivalent Forced Outage Rate (EFOR)
     EFOR = main_calc_data.efor
@@ -47,7 +49,7 @@ async def get_model_data(*, db_session: DbSession, simulation_id: Optional[UUID]
     #Prediction
     EAF = main_calc_data.eaf
     Derating = main_calc_data.derating_hours
-    Trip = main_calc_data.num_events
+    Trip = main_calc_data.num_events-1 if is_oh else main_calc_data.num_events
     EAF_KONKIN = main_calc_data.eaf_konkin
     
     SOF = main_calc_data.sof