//+------------------------------------------------------------------+
//|                                                     SimpleEA.mq4 |
//|                        Copyright 2020, MetaQuotes Software Corp. |
//|                                            https://triantoadi.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2020, MetaQuotes Software Corp."
#property link      "https://triantoadi.com
#property version   "1.00"
#property strict

extern int StartHour = 9;

void OnTick()
{
static bool FirstTick = true;

if(Hour() == StartHour)
{
if(FirstTick == true)
{
FirstTick = false;

//CORE OF THE ALGORITHMIC TRADING SYSTEM

Alert("First tick of hour");
}

}
else
{
FirstTick = true;
}

}