//|                                      Copyright © 2019, Abu Saidu |
//|                                                t.me/ask4abusaidu |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2020, Abu Saidu"
#property link     "https://www.mql5.com/en/users/ask4abusaidu"
 ""
#property description "For more information contact" // Description (line 1)
#property description ">>Telegram = t.me/ask4abusaidu<<"
#property description ">>whatsapp = +2347018717038<<"
#property version "1.0"
#property strict

#include <Trade\PositionInfo.mqh>
#include <Trade\Trade.mqh>
#include <Trade\SymbolInfo.mqh>  
CPositionInfo  m_position;                   // trade position object
CTrade         m_trade;                      // trading object
CSymbolInfo    m_symbol;                     // symbol info object

enum ENUM_TYPE_TRADE
  {
   buy=0,      // Only BUY
   sell=1,     // Only SELL
   buy_sell=2, // BUY and SELL
  };

input int     InpBandsPeriod=20;       // Period
input int     InpBandsShift=0;         // Shift
input double  InpBandsDeviations=2.0;  // Deviation
extern int    MagicNumber=15485;
input double  InpLots           = 1.0;         // Lots
input ushort  InpStopLoss       = 1000;          // Stop Loss (in pips) (do not use "0")
input ushort  InpTakeProfit     = 1000;         // Take Profit (in pips) (do not use "0")
input ENUM_TYPE_TRADE   InpTypeTrade      = buy_sell;      // Type trade: 


bool   crossed[2];
double Open[];
double upperbb[],midbb[],lowerbb[];
int    bbhandle;

ulong          m_slippage=10;                // slippage

double         ExtStopLoss=0.0;
double         ExtTakeProfit=0.0;
double         ExtStep=0.0;

datetime       last_OUT_position_time=0;     // последнее время закрытия позиции
int            handle_iMA;                   // variable for storing the handle of the iMA indicator 

double         m_adjusted_point;             // point value adjusted for 3 or 5 points
//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
   if(!m_symbol.Name(Symbol())) // sets symbol name
      return(INIT_FAILED);
   RefreshRates();
//---
   m_trade.SetMarginMode();
   m_trade.SetTypeFillingBySymbol(m_symbol.Name());
   m_trade.SetDeviationInPoints(m_slippage);
//--- tuning for 3 or 5 digits
   int digits_adjust=1;
   if(m_symbol.Digits()==3 || m_symbol.Digits()==5)
      digits_adjust=10;
   m_adjusted_point=m_symbol.Point()*digits_adjust;

   ExtStopLoss       = InpStopLoss        * m_adjusted_point;
   ExtTakeProfit     = InpTakeProfit      * m_adjusted_point;
//---
   ArraySetAsSeries(midbb, true);
   ArraySetAsSeries(upperbb, true);
   ArraySetAsSeries(lowerbb, true);
  
   bbhandle = iBands(_Symbol,PERIOD_CURRENT,InpBandsPeriod,InpBandsShift,InpBandsDeviations,PRICE_CLOSE);
//---
   for (int i = 0; i < ArraySize(crossed); i++)
      crossed[i] = true;

   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
{

      IndicatorRelease(bbhandle);
}
//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {

      CopyBuffer(bbhandle, 0, 0, 2, midbb);
      CopyBuffer(bbhandle, 1, 0, 2, upperbb);
      CopyBuffer(bbhandle, 2, 0, 2, lowerbb);
  if(CopyOpen(Symbol(), PERIOD_CURRENT, 0, 2, Open) <= 0) return;
   ArraySetAsSeries(Open, true);
//---
   ulong ordt = 0;
if(Cross(0,Open[0] > midbb[0]))
     {
            double sl=(InpStopLoss==0)?0.0:m_symbol.Ask()-ExtStopLoss;
            double tp=(InpTakeProfit==0)?0.0:m_symbol.Ask()+ExtTakeProfit;
            OpenBuy(sl,tp);
            return;
     }
if(Cross(1,Open[0] < midbb[0]))
{
            double sl=(InpStopLoss==0)?0.0:m_symbol.Bid()+ExtStopLoss;
            double tp=(InpTakeProfit==0)?0.0:m_symbol.Bid()-ExtTakeProfit;
            OpenSell(sl,tp);
            return;
  
  }
}
bool Cross(int i, bool condition) //returns true if "condition" is true and was false in the previous call
  {
   bool ret = condition && !crossed[i];
   crossed[i] = condition;
   return(ret);
  }
//+------------------------------------------------------------------+
//| TradeTransaction function                                        |
//+------------------------------------------------------------------+
void OnTradeTransaction(const MqlTradeTransaction &trans,
                        const MqlTradeRequest &request,
                        const MqlTradeResult &result)
  {
//---

  }
//+------------------------------------------------------------------+
//| Open Buy position                                                |
//+------------------------------------------------------------------+
void OpenBuy(double sl,double tp)
  {
   sl=m_symbol.NormalizePrice(sl);
   tp=m_symbol.NormalizePrice(tp);
//--- check volume before OrderSend to avoid "not enough money" error (CTrade)
   double check_volume_lot=m_trade.CheckVolume(m_symbol.Name(),InpLots,m_symbol.Ask(),ORDER_TYPE_BUY);

   if(check_volume_lot!=0.0)
     {
      if(check_volume_lot>=InpLots)
        {
         if(m_trade.Buy(InpLots,m_symbol.Name(),m_symbol.Ask(),sl,tp))
           {
            if(m_trade.ResultDeal()==0)
              {
               Print(__FUNCTION__,", #1 Buy -> false. Result Retcode: ",m_trade.ResultRetcode(),
                     ", description of result: ",m_trade.ResultRetcodeDescription());
               PrintResult(m_trade,m_symbol);
              }
            else
              {
               Print(__FUNCTION__,", #2 Buy -> true. Result Retcode: ",m_trade.ResultRetcode(),
                     ", description of result: ",m_trade.ResultRetcodeDescription());
               PrintResult(m_trade,m_symbol);
              }
           }
         else
           {
            Print(__FUNCTION__,", #3 Buy -> false. Result Retcode: ",m_trade.ResultRetcode(),
                  ", description of result: ",m_trade.ResultRetcodeDescription());
            PrintResult(m_trade,m_symbol);
           }
        }
      else
        {
         Print(__FUNCTION__,", ERROR: method CheckVolume (",DoubleToString(check_volume_lot,2),") ",
               "< Lots (",DoubleToString(InpLots,2),")");
         return;
        }
     }
   else
     {
      Print(__FUNCTION__,", ERROR: method CheckVolume returned the value of \"0.0\"");
      return;
     }
//---
  }
//+------------------------------------------------------------------+
//| Open Sell position                                               |
//+------------------------------------------------------------------+
void OpenSell(double sl,double tp)
  {
   sl=m_symbol.NormalizePrice(sl);
   tp=m_symbol.NormalizePrice(tp);
//--- check volume before OrderSend to avoid "not enough money" error (CTrade)
   double check_volume_lot=m_trade.CheckVolume(m_symbol.Name(),InpLots,m_symbol.Bid(),ORDER_TYPE_SELL);

   if(check_volume_lot!=0.0)
     {
      if(check_volume_lot>=InpLots)
        {
         if(m_trade.Sell(InpLots,m_symbol.Name(),m_symbol.Bid(),sl,tp))
           {
            if(m_trade.ResultDeal()==0)
              {
               Print(__FUNCTION__,", #1 Sell -> false. Result Retcode: ",m_trade.ResultRetcode(),
                     ", description of result: ",m_trade.ResultRetcodeDescription());
               PrintResult(m_trade,m_symbol);
              }
            else
              {
               Print(__FUNCTION__,", #2 Sell -> true. Result Retcode: ",m_trade.ResultRetcode(),
                     ", description of result: ",m_trade.ResultRetcodeDescription());
               PrintResult(m_trade,m_symbol);
              }
           }
         else
           {
            Print(__FUNCTION__,", #3 Sell -> false. Result Retcode: ",m_trade.ResultRetcode(),
                  ", description of result: ",m_trade.ResultRetcodeDescription());
            PrintResult(m_trade,m_symbol);
           }
        }
      else
        {
         Print(__FUNCTION__,", ERROR: method CheckVolume (",DoubleToString(check_volume_lot,2),") ",
               "< Lots (",DoubleToString(InpLots,2),")");
         return;
        }
     }
   else
     {
      Print(__FUNCTION__,", ERROR: method CheckVolume returned the value of \"0.0\"");
      return;
     }
//---
  }
void PrintResult(CTrade &trade,CSymbolInfo &symbol)
  {
   Print("Code of request result: "+IntegerToString(trade.ResultRetcode()));
   Print("code of request result: "+trade.ResultRetcodeDescription());
   Print("deal ticket: "+IntegerToString(trade.ResultDeal()));
   Print("order ticket: "+IntegerToString(trade.ResultOrder()));
   Print("volume of deal or order: "+DoubleToString(trade.ResultVolume(),2));
   Print("price, confirmed by broker: "+DoubleToString(trade.ResultPrice(),symbol.Digits()));
   Print("current bid price: "+DoubleToString(trade.ResultBid(),symbol.Digits()));
   Print("current ask price: "+DoubleToString(trade.ResultAsk(),symbol.Digits()));
   Print("broker comment: "+trade.ResultComment());
   int d=0;
  }
//+------------------------------------------------------------------+
//| Refreshes the symbol quotes data                                 |
//+------------------------------------------------------------------+
bool RefreshRates(void)
  {
//--- refresh rates
   if(!m_symbol.RefreshRates())
     {
      Print("RefreshRates error");
      return(false);
     }
//--- protection against the return value of "zero"
   if(m_symbol.Ask()==0 || m_symbol.Bid()==0)
      return(false);
//---
   return(true);
  }
//+------------------------------------------------------------------+
//| Check Freeze and Stops levels                                    |
//+------------------------------------------------------------------+
bool FreezeStopsLevels(double &level)
  {
//--- check Freeze and Stops levels
/*
   Type of order/position  |  Activation price  |  Check
   ------------------------|--------------------|--------------------------------------------
   Buy Limit order         |  Ask               |  Ask-OpenPrice  >= SYMBOL_TRADE_FREEZE_LEVEL
   Buy Stop order          |  Ask	            |  OpenPrice-Ask  >= SYMBOL_TRADE_FREEZE_LEVEL
   Sell Limit order        |  Bid	            |  OpenPrice-Bid  >= SYMBOL_TRADE_FREEZE_LEVEL
   Sell Stop order	      |  Bid	            |  Bid-OpenPrice  >= SYMBOL_TRADE_FREEZE_LEVEL
   Buy position            |  Bid	            |  TakeProfit-Bid >= SYMBOL_TRADE_FREEZE_LEVEL 
                           |                    |  Bid-StopLoss   >= SYMBOL_TRADE_FREEZE_LEVEL
   Sell position           |  Ask	            |  Ask-TakeProfit >= SYMBOL_TRADE_FREEZE_LEVEL
                           |                    |  StopLoss-Ask   >= SYMBOL_TRADE_FREEZE_LEVEL
                           
   Buying is done at the Ask price                 |  Selling is done at the Bid price
   ------------------------------------------------|----------------------------------
   TakeProfit        >= Bid                        |  TakeProfit        <= Ask
   StopLoss          <= Bid	                     |  StopLoss          >= Ask
   TakeProfit - Bid  >= SYMBOL_TRADE_STOPS_LEVEL   |  Ask - TakeProfit  >= SYMBOL_TRADE_STOPS_LEVEL
   Bid - StopLoss    >= SYMBOL_TRADE_STOPS_LEVEL   |  StopLoss - Ask    >= SYMBOL_TRADE_STOPS_LEVEL
*/
   if(!RefreshRates() || !m_symbol.Refresh())
      return(false);
//--- FreezeLevel -> for pending order and modification
   double freeze_level=m_symbol.FreezeLevel()*m_symbol.Point();
   if(freeze_level==0.0)
      freeze_level=(m_symbol.Ask()-m_symbol.Bid())*3.0;
   freeze_level*=1.1;
//--- StopsLevel -> for TakeProfit and StopLoss
   double stop_level=m_symbol.StopsLevel()*m_symbol.Point();
   if(stop_level==0.0)
      stop_level=(m_symbol.Ask()-m_symbol.Bid())*3.0;
   stop_level*=1.1;

   if(freeze_level<=0.0 || stop_level<=0.0)
      return(false);

   level=(freeze_level>stop_level)?freeze_level:stop_level;
//---
   return(true);
  }
//+------------------------------------------------------------------+
//| Trailing                                                         |
//|   InpTrailingStop: min distance from price to Stop Loss          |
//+------------------------------------------------------------------+
bool Modification(const double level)
  {
   bool result=true;
   int counter=0;
/*
     Buying is done at the Ask price                 |  Selling is done at the Bid price
   ------------------------------------------------|----------------------------------
   TakeProfit        >= Bid                        |  TakeProfit        <= Ask
   StopLoss          <= Bid	                     |  StopLoss          >= Ask
   TakeProfit - Bid  >= SYMBOL_TRADE_STOPS_LEVEL   |  Ask - TakeProfit  >= SYMBOL_TRADE_STOPS_LEVEL
   Bid - StopLoss    >= SYMBOL_TRADE_STOPS_LEVEL   |  StopLoss - Ask    >= SYMBOL_TRADE_STOPS_LEVEL
*/
   for(int i=PositionsTotal()-1;i>=0;i--) // returns the number of open positions
      if(m_position.SelectByIndex(i))
         if(m_position.Symbol()==m_symbol.Name())
           {
            if(m_position.PositionType()==POSITION_TYPE_BUY && (InpTypeTrade==buy || InpTypeTrade==buy_sell))
              {
               double price=m_symbol.Ask();

               double sl=(InpStopLoss==0)?m_position.StopLoss():price-ExtStopLoss;
               if(sl!=0.0 && ExtStopLoss<level) // check sl
                  sl=price-level;

               double tp=(InpTakeProfit==0)?m_position.TakeProfit():price+ExtTakeProfit;
               if(tp!=0.0 && ExtTakeProfit<level) // check price
                  tp=price+level;

               if(!m_trade.PositionModify(m_position.Ticket(),
                  m_symbol.NormalizePrice(sl),
                  m_symbol.NormalizePrice(tp)))
                 {
                  result=false;
                  Print("Modify ",m_position.Ticket(),
                        " Position -> false. Result Retcode: ",m_trade.ResultRetcode(),
                        ", description of result: ",m_trade.ResultRetcodeDescription());
                 }
               counter++;
               RefreshRates();
               m_position.SelectByIndex(i);
               PrintResultModify(m_trade,m_symbol,m_position);
               continue;
              }
            if(m_position.PositionType()==POSITION_TYPE_SELL && (InpTypeTrade==sell || InpTypeTrade==buy_sell))
              {
               double price=m_symbol.Bid();

               double sl=(InpStopLoss==0)?m_position.StopLoss():price+ExtStopLoss;
               if(sl!=0.0 && ExtStopLoss<level) // check sl
                  sl=price+level;

               double tp=(InpTakeProfit==0)?m_position.StopLoss():price-ExtTakeProfit;
               if(tp!=0.0 && ExtTakeProfit<level) // check tp
                  tp=price-level;

               if(!m_trade.PositionModify(m_position.Ticket(),
                  m_symbol.NormalizePrice(sl),
                  m_symbol.NormalizePrice(tp)))
                 {
                  result=false;
                  Print("Modify ",m_position.Ticket(),
                        " Position -> false. Result Retcode: ",m_trade.ResultRetcode(),
                        ", description of result: ",m_trade.ResultRetcodeDescription());
                 }
               counter++;
               RefreshRates();
               m_position.SelectByIndex(i);
               PrintResultModify(m_trade,m_symbol,m_position);
               continue;
              }
           }
//---
   if(counter==0)
      return(false);
   return(result);
  }
//+------------------------------------------------------------------+
//| Print CTrade result                                              |
//+------------------------------------------------------------------+
void PrintResultModify(CTrade &trade,CSymbolInfo &symbol,CPositionInfo &position)
  {
   Print("File: ",__FILE__,", symbol: ",m_symbol.Name());
   Print("Code of request result: "+IntegerToString(trade.ResultRetcode()));
   Print("code of request result as a string: "+trade.ResultRetcodeDescription());
   Print("Deal ticket: "+IntegerToString(trade.ResultDeal()));
   Print("Order ticket: "+IntegerToString(trade.ResultOrder()));
   Print("Volume of deal or order: "+DoubleToString(trade.ResultVolume(),2));
   Print("Price, confirmed by broker: "+DoubleToString(trade.ResultPrice(),symbol.Digits()));
   Print("Current bid price: "+DoubleToString(symbol.Bid(),symbol.Digits())+" (the requote): "+DoubleToString(trade.ResultBid(),symbol.Digits()));
   Print("Current ask price: "+DoubleToString(symbol.Ask(),symbol.Digits())+" (the requote): "+DoubleToString(trade.ResultAsk(),symbol.Digits()));
   Print("Broker comment: "+trade.ResultComment());
   Print("Freeze Level: "+DoubleToString(m_symbol.FreezeLevel(),0),", Stops Level: "+DoubleToString(m_symbol.StopsLevel(),0));
   Print("Price of position opening: "+DoubleToString(position.PriceOpen(),symbol.Digits()));
   Print("Price of position's Stop Loss: "+DoubleToString(position.StopLoss(),symbol.Digits()));
   Print("Price of position's Take Profit: "+DoubleToString(position.TakeProfit(),symbol.Digits()));
   Print("Current price by position: "+DoubleToString(position.PriceCurrent(),symbol.Digits()));
   int d=0;
  }
//+------------------------------------------------------------------+