//--- input parameters price going up / down
MqlRates PriceInfo[];
string   signal="";

//--- void OnTick()
   //--- Get Array 
   string signal="";
   MqlRates PriceArray[];
   ArraySetAsSeries(PriceArray,true);
   int Data = CopyRates(_Symbol,_Period,0,3,PriceArray);
    //--- if is going up   
   if (PriceArray[1].close>PriceArray[2].close)
   {
      signal="buy";
   }
    //--- if is going down   
   if (PriceArray[1].close