In previous code I used the time to detect a new bar. This time let's use the bars count to detect a new bar. it's way lighter and faster than using the time method.

• Declare the variables in integer data type to store the bar counts. 
• Assign the bars count for the "BarsTotal_OnInt" at the initialization. 
• Use iBars(); function to assign the bars count for the "BarsTotal_OnTick" variable at live chart. This variable is updated on every tick. 
• Use comments and alerts to check the code accuracy.

int BarsTotal_OnInt;   int BarsTotal_OnTick;  //+------------------------------------------------------------------+  //| Expert initialization function                                   |  //+------------------------------------------------------------------+  int OnInit()    {       BarsTotal_OnInt = iBars(NULL,PERIOD_CURRENT); // Asign the total bars at initialization     return(INIT_SUCCEEDED);    }      void OnTick() // OnTick Function    {        BarsTotal_OnTick = iBars(NULL,PERIOD_CURRENT); // Stores the latest amount          if(BarsTotal_OnTick > BarsTotal_OnInt) // New bar has arrived     {      BarsTotal_OnInt = BarsTotal_OnTick; // Updates the history.      Alert("New Bar has arrived");      Comment("Bars Count in history -: ", BarsTotal_OnInt, "\n", "Bars Count in Live -: ", BarsTotal_OnTick);         // Your Code goes here. --------------------------            // You can update a "flag" / variable to use it on later too.        }    }