//+------------------------------------------------------------------+
//|                                                          Buy.mq5 |
//|                                    Copyright 2018, Romeu Bertho. |
//|                           https://www.mql5.com/pt/users/c4b3l3r4 |
//+------------------------------------------------------------------+
#property copyright "Copyright 2018, Romeu Bertho."
#property link      "https://www.mql5.com/pt/users/c4b3l3r4"
#property version   "1.00"
#property script_show_inputs

//--- input parameters
input string op0="-------------- Parâmetros de Entrada --------------"; // -------------- Parâmetros de Entrada --------------
input double Volume=1; // Quantidade
input int TakeProfit=100;       // TakeProfit 
input int StopLoss=100;          // Stoploss
input int Magic=12345;

ENUM_ORDER_TYPE_FILLING type_filling=ORDER_FILLING_FOK;
ENUM_ORDER_TYPE_TIME expiration=ORDER_TIME_GTC;
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
  {
//---
   Buy(_Symbol,0,Volume,TakeProfit,StopLoss,"Buy");
  }
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
bool Buy(string symbol,double price,double volume,int takeProfit,int stopLoss,string comment)
  {
   MqlTradeRequest request={0};
   MqlTradeResult result={0};
   double SL=0;
   double TP=0;
   if(price==0)
      price=SymbolInfoDouble(symbol,SYMBOL_ASK);
   if(stopLoss>0)
      SL=NormalizeDouble(price-stopLoss*_Point,_Digits);
   if(takeProfit>0)
      TP=NormalizeDouble(price+takeProfit*_Point,_Digits);
   if(comment==NULL)
      comment=StringFormat("Long %s %G lotes ",symbol,volume);
//--- Preenchimento da estrutura
   request.action=TRADE_ACTION_DEAL;
   request.symbol=symbol;
   request.volume=volume;
   request.type=ORDER_TYPE_BUY;
   request.price=price;
   request.tp=TP;
   request.sl=SL;
   request.deviation=10;
   request.magic=Magic;
   request.type_filling=type_filling;
   request.expiration=expiration;
   request.comment=comment;
//--- Envio da ordem
   if(!OrderSend(request,result))
     {
      //--- Falha na ordem
      Print("Ordem de compra falhou. Código de retorno=",result.retcode);
      return false;
     }
   else
     {
      Print("Ordem de compra executada com sucesso. Código de retorno=",result.retcode);
      return true;
     }
   return false;
  }
//+------------------------------------------------------------------+