Ask! - Page 3

codersguru · #21 (**permalink**) 11-11-2005, 11:41 PM

Quote:

Originally Posted by ferman

Hi,

can you explain, how to work with the backtesting ?
what is needed to do for preparing our EA for backtesting ?
how is backtesting works (every tick, open price ...) ?

thanks.

Hi ferman,

Could you wait for backtesting lesson very soon!
I hope you red the previous lessons?

hua · #22 (**permalink**) 11-15-2005, 11:11 AM

ONE VITAL QUESTION.
In case for an alert in EA, we can mark ''disable alert once hit''.
how we can do that on indicator alerts???
Many tks in advance.

codersguru · #23 (**permalink**) 11-15-2005, 05:22 PM

Quote:

Originally Posted by hua

ONE VITAL QUESTION.
In case for an alert in EA, we can mark ''disable alert once hit''.
how we can do that on indicator alerts???
Many tks in advance.

Hua,

Please refer to my reply here.

I can make a demo for you if you want, Please tell me the indicator you want to add to ''disable alert once hit''.

yaniv_av · #24 (**permalink**) 11-16-2005, 04:57 PM

How can I code a time base exit command ?
I want to know the duration of an open position expresse by the number of bars that position already open.
Actually, I want to close a position automatically after 30 bars (in my expert-advisor)
How can I code that in mql4?

10X !

codersguru · #25 (**permalink**) 11-16-2005, 11:28 PM

Quote:

Originally Posted by yaniv_av

How can I code a time base exit command ?
I want to know the duration of an open position expresse by the number of bars that position already open.
Actually, I want to close a position automatically after 30 bars (in my expert-advisor)
How can I code that in mql4?

10X !

Hi yanuv_av,

I'm so sorry for the delay in replaying you; I've spent all the day fixing my damn car to reach my office and reply your questions

.

Now you have an EA and want to close the order after 30 bars (or whatever count you want), Right?

Well

Place this function on the top of start() function:

PHP Code:


			
bool BarsCountDown(int count)

   {

      

      static bool first_call = true; 

      static int start_bar = 0; 

      if(first_call)

      { 

         start_bar=Bars;

         first_call=false;

      }

      if(Bars == (start_bar+count))

      {

         Print("(TRUE) Bars= " + Bars + " : start_bars = " + start_bar);

         first_call=true;

         return (true);

      }

      else

      {

         Print("(FALSE) Bars= " + Bars + " : start_bars = " + start_bar);

         return (false);

      }

      

      

   }

How to use this function:

bool BarsCountDown(30);

The line above returns false if the current bar hasn't exceeded the number 30 from the first call of the function (the 30 bars not yet counted)

And returns true if the current bar has exceeded the 30 bars

So, when you get true, close the position

In your start() function you may use code like this:

PHP Code:


			
start()

{

  ....

  if(BarsCountDwon(30))

  OrderClose(OrderTicket(),OrderLots(),Bid,3,Red); // close position

  .....

}

I hope you've got it.

codersguru · #26 (**permalink**) 11-30-2005, 12:29 AM

Quote:

Originally Posted by codersguru

Hi yanuv_av,

I'm so sorry for the delay in replaying you; I've spent all the day fixing my damn car to reach my office and reply your questions

.

Now you have an EA and want to close the order after 30 bars (or whatever count you want), Right?

Well

Place this function on the top of start() function:

PHP Code:


			
bool BarsCountDown(int count)

   {

      

      static bool first_call = true; 

      static int start_bar = 0; 

      if(first_call)

      { 

         start_bar=Bars;

         first_call=false;

      }

      if(Bars == (start_bar+count))

      {

         Print("(TRUE) Bars= " + Bars + " : start_bars = " + start_bar);

         first_call=true;

         return (true);

      }

      else

      {

         Print("(FALSE) Bars= " + Bars + " : start_bars = " + start_bar);

         return (false);

      }

      

      

   }

How to use this function:

bool BarsCountDown(30);

The line above returns false if the current bar hasn't exceeded the number 30 from the first call of the function (the 30 bars not yet counted)

And returns true if the current bar has exceeded the 30 bars

So, when you get true, close the position

In your start() function you may use code like this:

PHP Code:


			
start()

{

  ....

  if(BarsCountDwon(30))

  OrderClose(OrderTicket(),OrderLots(),Bid,3,Red); // close position

  .....

}

I hope you've got it.

yanuv_av,

Did that work for you?

alnasiradhikari · #27 (**permalink**) 12-06-2005, 06:05 AM

Hello,
First of all I am very imprest with this site and also with coder, who is helping us to test and make difference code

I am looking to have a code to open and close my position with the following deffination

ema = 3
ema = 13
when ema 3 cross from down to ema 13 plus move 5 pips up, the order will open automatically eample ema 3 and ema 13 cross at 1.1705 for euro/usd my order will be open at 1.1710 it is something like bunnygirl system but I dont know how to make expert please help me.

same technique for selling but all technique reverse

Thanks

hua · #28 (**permalink**) 12-06-2005, 06:18 AM

Dear CodersGuru, can we hv an alert when this indicator changes colour pls??

codersguru · #29 (**permalink**) 12-06-2005, 01:29 PM

Quote:

Originally Posted by hua

Dear CodersGuru, can we hv an alert when this indicator changes colour pls??

Dear hua,

Please try this:

PHP Code:


			
//+------------------------------------------------------------------+
//|                                                     Trigger Line |
//|                             Copyright © 2005 dwt5 and adoleh2000 |
//|                                     http://www.metaquotes.net |
//+------------------------------------------------------------------+
#property  copyright "Copyright © 2005 dwt5 and adoleh2000 "
#property  link      "http://www.metaquotes.net/"

//---- indicator settings
#property  indicator_chart_window
#property  indicator_buffers 4            
#property indicator_color1 Red      
#property indicator_color2 Red
#property indicator_color3 Blue
#property indicator_color4 Blue

//---- buffers
double ExtMapBuffer1[];
double ExtMapBuffer2[];
double ExtMapBuffer3[];
double ExtMapBuffer4[];

int width;

extern int Rperiod = 15;
extern int LSMA_Period = 5;
int Draw4HowLong;
int shift;
int i;
int j;
int loopbegin;
int length;
int lsma_length;

double lengthvar;
double tmp ;
double tmp2 ;
double wt[];
double sum[];
double lsma_sum[];
double lsma_ma[];
double middle[];
int c;

//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//---- 7 additional buffers are used for counting.
   IndicatorBuffers(7);   
   
//---- drawing settings
   
   SetIndexBuffer(0,ExtMapBuffer1);
   SetIndexStyle(0,DRAW_LINE,STYLE_SOLID,2);
   
   SetIndexBuffer(1,ExtMapBuffer2);
   SetIndexStyle(1,DRAW_LINE,STYLE_SOLID,2);
   
   SetIndexBuffer(2,ExtMapBuffer3);
   SetIndexStyle(2,DRAW_LINE,STYLE_SOLID,2);
   
   SetIndexBuffer(3,ExtMapBuffer4);
   SetIndexStyle(3,DRAW_LINE,STYLE_SOLID,2);
   
   
   
   SetIndexBuffer(4,sum);        
   SetIndexBuffer(5,wt);         
   SetIndexBuffer(6,lsma_ma);
   
//---- initialization done
   return(0);
  }

int start()

 { Draw4HowLong = Bars-Rperiod - 5;                         //Rperiod = 20
     length = Rperiod;                                         //length now = 20 
      lsma_length = LSMA_Period;
      loopbegin = Draw4HowLong - length - 1;   
      

      for(shift = loopbegin; shift >= 0; shift--)  //  MAIN For Loop
      { 
         sum[1] = 0;                                             
         for(i = length; i >= 1 ; i--)             //LSMA loop
         {
         lengthvar = length + 1;                             //lengthvar = 21 
         lengthvar /= 3;                                     //lengthvar = 7
         tmp = 0;
         tmp = ( i - lengthvar)*Close[length-i+shift];         //tmp = 20 - 7 * close[20-i+shift]
         sum[1]+=tmp;
         }
         wt[shift] = sum[1]*6/(length*(length+1));  
         j = shift;
         lsma_ma[shift] = wt[j+1] + (wt[j]-wt[j+1])* 2/(lsma_length+1);
  
                         
//========== COLOR CODING ===========================================                     
        
        
            ExtMapBuffer1[shift] = wt[shift]; 
            ExtMapBuffer2[shift] = lsma_ma[shift]; 
            ExtMapBuffer3[shift] = wt[shift]; 
            ExtMapBuffer4[shift] = lsma_ma[shift]; 
            
            
            
            if (wt[shift]  < lsma_ma[shift])
            {
                //Alert("color changed");
                ExtMapBuffer4[shift] = EMPTY_VALUE;
                ExtMapBuffer3[shift] = EMPTY_VALUE;
           }          
        
        }
        
        // Alerts on color change
        // added by codersguru - www.forex-tsd.com

        static string last_clr = "";
        string current_clr;
        static bool first_time = false;
        
        if (first_time)
        {
         if (wt[0]  < lsma_ma[0])
            current_clr="Red";
         if (wt[0]  > lsma_ma[0])
            current_clr="Blue";
        
         if(last_clr != current_clr) //changed 
          {
             last_clr = current_clr;
             Alert("changed : current color is " + current_clr);
          }
         }
         else
         {
            first_time = true;
         }
         
  }
//+------------------------------------------------------------------+

hua · #30 (**permalink**) 12-06-2005, 02:17 PM

Quote:

Originally Posted by codersguru

Dear hua,

Please try this:

PHP Code:


			
//+------------------------------------------------------------------+

//|                                                     Trigger Line |

//|                             Copyright © 2005 dwt5 and adoleh2000 |

//|                                     http://www.metaquotes.net |

//+------------------------------------------------------------------+

#property  copyright "Copyright © 2005 dwt5 and adoleh2000 "

#property  link      "http://www.metaquotes.net/"



//---- indicator settings

#property  indicator_chart_window

#property  indicator_buffers 4            

#property indicator_color1 Red      

#property indicator_color2 Red

#property indicator_color3 Blue

#property indicator_color4 Blue



//---- buffers

double ExtMapBuffer1[];

double ExtMapBuffer2[];

double ExtMapBuffer3[];

double ExtMapBuffer4[];



int width;



extern int Rperiod = 15;

extern int LSMA_Period = 5;

int Draw4HowLong;

int shift;

int i;

int j;

int loopbegin;

int length;

int lsma_length;



double lengthvar;

double tmp ;

double tmp2 ;

double wt[];

double sum[];

double lsma_sum[];

double lsma_ma[];

double middle[];

int c;



//+------------------------------------------------------------------+

//| Custom indicator initialization function                         |

//+------------------------------------------------------------------+

int init()

  {

//---- 7 additional buffers are used for counting.

   IndicatorBuffers(7);   

   

//---- drawing settings

   

   SetIndexBuffer(0,ExtMapBuffer1);

   SetIndexStyle(0,DRAW_LINE,STYLE_SOLID,2);

   

   SetIndexBuffer(1,ExtMapBuffer2);

   SetIndexStyle(1,DRAW_LINE,STYLE_SOLID,2);

   

   SetIndexBuffer(2,ExtMapBuffer3);

   SetIndexStyle(2,DRAW_LINE,STYLE_SOLID,2);

   

   SetIndexBuffer(3,ExtMapBuffer4);

   SetIndexStyle(3,DRAW_LINE,STYLE_SOLID,2);

   

   

   

   SetIndexBuffer(4,sum);        

   SetIndexBuffer(5,wt);         

   SetIndexBuffer(6,lsma_ma);

   

//---- initialization done

   return(0);

  }



int start()



 { Draw4HowLong = Bars-Rperiod - 5;                         //Rperiod = 20

     length = Rperiod;                                         //length now = 20 

      lsma_length = LSMA_Period;

      loopbegin = Draw4HowLong - length - 1;   

      



      for(shift = loopbegin; shift >= 0; shift--)  //  MAIN For Loop

      { 

         sum[1] = 0;                                             

         for(i = length; i >= 1 ; i--)             //LSMA loop

         {

         lengthvar = length + 1;                             //lengthvar = 21 

         lengthvar /= 3;                                     //lengthvar = 7

         tmp = 0;

         tmp = ( i - lengthvar)*Close[length-i+shift];         //tmp = 20 - 7 * close[20-i+shift]

         sum[1]+=tmp;

         }

         wt[shift] = sum[1]*6/(length*(length+1));  

         j = shift;

         lsma_ma[shift] = wt[j+1] + (wt[j]-wt[j+1])* 2/(lsma_length+1);

  

                         

//========== COLOR CODING ===========================================                     

 &

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