How can I sell to my EA to enter Long only if the previous order was a Short, and viceversa?

 
Your question in other words contradicts the topic :)

Anyway.
Lookup the account history for the latest closed order.
datetime tm, latest = 0;

int type = -1;
int i = HistoryTotal();
while (i > 0)
{
    i--;
    OrderSelect(i, SELECT_BY_POS, MODE_HISTORY);
    tm = OrderCloseTime();
    if (latest < tm)
    {
        latest = tm;
        type = OrderType();
    }
}

switch (type)
{
    case OP_BUY:
        OrderSend(Symbol(), OP_BUY, 1., Ask, 3, 0., 0.);
        break;

    case OP_SELL;
        OrderSend(Symbol(), OP_SELL, 1., Bid, 3, 0., 0.);
}




 
Your question in other words contradicts the topic :)

Anyway.
Lookup the account history for the latest closed order.







Sorry but I'm going crazy with it...How I have to modify this code?

//+------------------------------------------------------------------+
//| This MQL is generated by Expert Advisor Builder                  |
//|                http://sufx.core.t3-ism.net/ExpertAdvisorBuilder/ |
//|                                                                  |
//|  In no event will author be liable for any damages whatsoever.   |
//|                      Use at your own risk.                       |
//|                                                                  |
//|                Please do not remove this header.                 |
//+------------------------------------------------------------------+
#property copyright "Expert Advisor Builder"
#property link      "http://sufx.core.t3-ism.net/ExpertAdvisorBuilder/"

extern int MagicNumber = 0;
extern bool SignalMail = False;
extern bool EachTickMode = False;
extern double Lots = 1.0;
extern int Slippage = 3;
extern bool StopLossMode = False;
extern int StopLoss = 30;
extern bool TakeProfitMode = False;
extern int TakeProfit = 60;
extern bool TrailingStopMode = False;
extern int TrailingStop = 30;

#define SIGNAL_NONE 0
#define SIGNAL_BUY   1
#define SIGNAL_SELL  2
#define SIGNAL_CLOSEBUY 3
#define SIGNAL_CLOSESELL 4

int BarCount;
int Current;
bool TickCheck = False;
//+------------------------------------------------------------------+
//| expert initialization function                                   |
//+------------------------------------------------------------------+
int init() {
   BarCount = Bars;

   if (EachTickMode) Current = 0; else Current = 1;

   return(0);
}
//+------------------------------------------------------------------+
//| expert deinitialization function                                 |
//+------------------------------------------------------------------+
int deinit() {
   return(0);
}
//+------------------------------------------------------------------+
//| expert start function                                            |
//+------------------------------------------------------------------+
int start() {
   int Order = SIGNAL_NONE;
   int Total, Ticket;
   double StopLossLevel, TakeProfitLevel;



   if (EachTickMode && Bars != BarCount) TickCheck = False;
   Total = OrdersTotal();
   Order = SIGNAL_NONE;

   //+------------------------------------------------------------------+
   //| Variable Begin                                                   |
   //+------------------------------------------------------------------+

      double Var1 = iStochastic(NULL, 0, 5, 3, 3, MODE_SMA, 0, MODE_MAIN, Current + 0);
      double Var2 = iStochastic(NULL, 0, 5, 3, 3, MODE_SMA, 0, MODE_SIGNAL, Current + 0);
      double Buy1_1 =  Var1 ;
      double Buy1_2 =  Var2 ;
      double Sell1_1 =  Var1 ;
      double Sell1_2 =  Var2 ;
      double CloseBuy1_1 =  Var1 ;
      double CloseBuy1_2 =  Var2 ;
      double CloseSell1_1 =  Var1 ;
      double CloseSell1_2 =  Var2 ;

   //+------------------------------------------------------------------+
   //| Variable End                                                     |
   //+------------------------------------------------------------------+

   //Check position
   bool IsTrade = False;

   for (int i = 0; i < Total; i ++) {
      OrderSelect(i, SELECT_BY_POS, MODE_TRADES);
      if(OrderType() <= OP_SELL &&  OrderSymbol() == Symbol()) {
         IsTrade = True;
         if(OrderType() == OP_BUY) {
            //Close

            //+------------------------------------------------------------------+
            //| Signal Begin(Exit Buy)                                           |
            //+------------------------------------------------------------------+

               if (CloseBuy1_1 < CloseBuy1_2) Order = SIGNAL_CLOSEBUY;

            //+------------------------------------------------------------------+
            //| Signal End(Exit Buy)                                             |
            //+------------------------------------------------------------------+

            if (Order == SIGNAL_CLOSEBUY && ((EachTickMode && !TickCheck) || (!EachTickMode && (Bars != BarCount)))) {
               OrderClose(OrderTicket(), OrderLots(), Bid, Slippage, MediumSeaGreen);
               if (SignalMail) SendMail("[Signal Alert]", "[" + Symbol() + "] " + DoubleToStr(Bid, Digits) + " Close Buy");
               if (!EachTickMode) BarCount = Bars;
               IsTrade = False;
               continue;
            }
            //Trailing stop
            if(TrailingStopMode && TrailingStop > 0) {                 
               if(Bid - OrderOpenPrice() > Point * TrailingStop) {
                  if(OrderStopLoss() < Bid - Point * TrailingStop) {
                     OrderModify(OrderTicket(), OrderOpenPrice(), Bid - Point * TrailingStop, OrderTakeProfit(), 0, MediumSeaGreen);
                     if (!EachTickMode) BarCount = Bars;
                     continue;
                  }
               }
            }
         } else {
            //Close

            //+------------------------------------------------------------------+
            //| Signal Begin(Exit Sell)                                          |
            //+------------------------------------------------------------------+

               if (CloseSell1_1 > CloseSell1_2) Order = SIGNAL_CLOSESELL;

            //+------------------------------------------------------------------+
            //| Signal End(Exit Sell)                                            |
            //+------------------------------------------------------------------+

            if (Order == SIGNAL_CLOSESELL && ((EachTickMode && !TickCheck) || (!EachTickMode && (Bars != BarCount)))) {
               OrderClose(OrderTicket(), OrderLots(), Ask, Slippage, DarkOrange);
               if (SignalMail) SendMail("[Signal Alert]", "[" + Symbol() + "] " + DoubleToStr(Ask, Digits) + " Close Sell");
               if (!EachTickMode) BarCount = Bars;
               IsTrade = False;
               continue;
            }
            //Trailing stop
            if(TrailingStopMode && TrailingStop > 0) {                 
               if((OrderOpenPrice() - Ask) > (Point * TrailingStop)) {
                  if((OrderStopLoss() > (Ask + Point * TrailingStop)) || (OrderStopLoss() == 0)) {
                     OrderModify(OrderTicket(), OrderOpenPrice(), Ask + Point * TrailingStop, OrderTakeProfit(), 0, DarkOrange);
                     if (!EachTickMode) BarCount = Bars;
                     continue;
                  }
               }
            }
         }
      }
   }

   //+------------------------------------------------------------------+
   //| Signal Begin(Entry)                                              |
   //+------------------------------------------------------------------+

      if (Buy1_1 > Buy1_2) Order = SIGNAL_BUY;
      if (Sell1_1 < Sell1_2) Order = SIGNAL_SELL;

   //+------------------------------------------------------------------+
   //| Signal End                                                       |
   //+------------------------------------------------------------------+

   //Buy
   if (Order == SIGNAL_BUY && ((EachTickMode && !TickCheck) || (!EachTickMode && (Bars != BarCount)))) {
      if(!IsTrade) {
         //Check free margin
         if (AccountFreeMargin() < (1000 * Lots)) {
            Print("We have no money. Free Margin = ", AccountFreeMargin());
            return(0);
         }

         if (StopLossMode) StopLossLevel = Ask - StopLoss * Point; else StopLossLevel = 0.0;
         if (TakeProfitMode) TakeProfitLevel = Ask + TakeProfit * Point; else TakeProfitLevel = 0.0;

         Ticket = OrderSend(Symbol(), OP_BUY, Lots, Ask, Slippage, StopLossLevel, TakeProfitLevel, "Buy(#" + MagicNumber + ")", MagicNumber, 0, DodgerBlue);
         if(Ticket > 0) {
            if (OrderSelect(Ticket, SELECT_BY_TICKET, MODE_TRADES)) {
				Print("BUY order opened : ", OrderOpenPrice());
                if (SignalMail) SendMail("[Signal Alert]", "[" + Symbol() + "] " + DoubleToStr(Ask, Digits) + " Open Buy");
			} else {
				Print("Error opening BUY order : ", GetLastError());
			}
         }
         if (EachTickMode) TickCheck = True;
         if (!EachTickMode) BarCount = Bars;
         return(0);
      }
   }

   //Sell
   if (Order == SIGNAL_SELL && ((EachTickMode && !TickCheck) || (!EachTickMode && (Bars != BarCount)))) {
      if(!IsTrade) {
         //Check free margin
         if (AccountFreeMargin() < (1000 * Lots)) {
            Print("We have no money. Free Margin = ", AccountFreeMargin());
            return(0);
         }

         if (StopLossMode) StopLossLevel = Bid + StopLoss * Point; else StopLossLevel = 0.0;
         if (TakeProfitMode) TakeProfitLevel = Bid - TakeProfit * Point; else TakeProfitLevel = 0.0;

         Ticket = OrderSend(Symbol(), OP_SELL, Lots, Bid, Slippage, StopLossLevel, TakeProfitLevel, "Sell(#" + MagicNumber + ")", MagicNumber, 0, DeepPink);
         if(Ticket > 0) {
            if (OrderSelect(Ticket, SELECT_BY_TICKET, MODE_TRADES)) {
				Print("SELL order opened : ", OrderOpenPrice());
                if (SignalMail) SendMail("[Signal Alert]", "[" + Symbol() + "] " + DoubleToStr(Bid, Digits) + " Open Sell");
			} else {
				Print("Error opening SELL order : ", GetLastError());
			}
         }
         if (EachTickMode) TickCheck = True;
         if (!EachTickMode) BarCount = Bars;
         return(0);
      }
   }

   if (!EachTickMode) BarCount = Bars;

   return(0);
}
//+------------------------------------------------------------------+


 
I thought to solve the problem in an other way...But it doesn't work. The code I thought to insert is the seguent:


//+------------------------------------------------------------------+
   //| Signal Begin(Entry)                                              |
   //+------------------------------------------------------------------+

      if (Buy1_1 > Buy1_2) Order = SIGNAL_BUY;
      if (Sell1_1 < Sell1_2) Order = SIGNAL_SELL;
      
      if ((A0 > (B0)) && (A1<B1)) {p = 1;}
     else if ((A0 > (B0)) && (A1<A0) && (A2<B2)) {p = 1;}
    else  if ((A0 > (B0)) && (A1<A0) && (A2<A1) && (A3<B3)) {p = 1;}
    else  if ((A0 > (B0)) && (A1<A0) && (A2<A1) && (A3<A2) && (A4<B4)) {p = 1;}
   else   if ((A0 > (B0)) && (A1<A0) && (A2<A1) && (A3<A2) && (A4<A3) && (A5<B5)) {p =1;}
    
   //+------------------------------------------------------------------+
   //| Signal End                                                       |
   //+------------------------------------------------------------------+

   //Buy
   if (Order == SIGNAL_BUY && (Total==0) && (p == 1) && ((EachTickMode2 && !TickCheck) || (!EachTickMode2 && (Bars != BarCount)))) ETC ETC ETC.........



where A0, A1, B0, etc..are some Moving Average. I would like that my EA opens a position only if almost one of these conditions are respected: in other words, I would like it opens a new position only when p = 1. But this code doesn't work as I want (it is YELLOW on the platform, but it doesn't consider the conditions..)..What is my error?




 
I look at this code all the day, but without any result..Can anyone help me?
 
I think I solved..after a day of work..But I hope this forum will help me in future anyway..Thanks in advance