How to code? - Page 67

omelette · #**661** (**permalink**) 02-02-2008, 05:41 PM

Quote:

Originally Posted by nittany1

I've been programming indicators for so many months that I'm a little deficient in experts but I'm intending to solve that. Along the way I need a little help. In my expert that I threw together I have it check at bar close if there is a condition that would warrant closing the trade.

I start with a global variable,

Code:

//--- Global variable
datetime PreviousBar;   // record candle/bar time

and set one bool in init()

Code:

int init()
  {
   do_this = true;
  }

blah blah boring stuff.... etc, etc
then in the main loop I have:

Code:

   if(do_this == true)
   {
      PreviousBar = Time[0];     
      do_this= false;    // so it does this only once only
   }

   if(NewBar() == true)
   {
      if(TotalOpenOrders() == blah blah close my order you crazy monkey)
   }

and outside the main loop I have:

Code:

//--- returns true if current bar just formed
bool NewBar()
{
   if(PreviousBar<Time[0])
   {
      PreviousBar = Time[0];
      return(true);
   }
   else
   {
      return(false);
   }
   return(false);  
}

OK so it is setup to do once per bar. What I want to do is have a function that increments 90 seconds or 60 seconds or whatever, then sets a bool to true after it's incremented that time. Basically I want to check the indicators every 60, 90, 120 seconds or whatever instead of at bar close. How do I do that?

Thanks for any help,

- nittany1

This should do it. Remember that MT uses tick-based execution so per-second-accuracy is not possible (unless you loop everything in the Init() sub.).

if (CallIndicatorsCheck())
{
// your code here
}

bool CallIndicatorsCheck()
{
static datetime Oldtime;
int Secs = 90;
bool Flag;

if (CurrTime() >= Oldtime) {
Oldtime = CurrTime() + Secs;
Flag = true; }

return(Flag);
}

wolfe · #**662** (**permalink**) 02-04-2008, 02:03 AM

Could someone show me the code to place a comment in the UPPER RIGHT corner of the screen, rather than the default upper left?

Thanks!

Linuxser · #**663** (**permalink**) 02-04-2008, 02:27 AM

Quote:

Originally Posted by wolfe

Could someone show me the code to place a comment in the UPPER RIGHT corner of the screen, rather than the default upper left?

Thanks!

You can't. From MQL4 manual:

Quote:

void Comment( ...)The function outputs the comment defined by the user in the left top corner of the chart.

If you need by death you could could create objects.

mog · #**664** (**permalink**) 02-04-2008, 03:24 AM

Quote:

Originally Posted by wolfe

Could someone show me the code to place a comment in the UPPER RIGHT corner of the screen, rather than the default upper left?

Thanks!

LinusGuy is right; there's no direct way. The easy workaround is to pad your Comment with spaces --
Comment(" <lots of spaces> hello world!");
willl offset the text to the right.
You can also put in line feeds to drop down the page.

Comment("\n\n\n\n\nyour text");

or combine linefeeds and space to print at the lower right-hand corner of the screen.

mog

wolfe · #**665** (**permalink**) 02-04-2008, 06:33 AM

Quote:

Originally Posted by mog

LinusGuy is right; there's no direct way. The easy workaround is to pad your Comment with spaces --
Comment(" <lots of spaces> hello world!");
willl offset the text to the right.
You can also put in line feeds to drop down the page.

Comment("\n\n\n\n\nyour text");

or combine linefeeds and space to print at the lower right-hand corner of the screen.

mog

Thanks for the help. I'll try it!

mikerawson · #**666** (**permalink**) 02-04-2008, 08:30 AM

hi team - hoping someone can help please..

how do i stop a new trade from commencing for 10 bars if the last trade was a loss?

cheers

ralph.ronnquist · #**667** (**permalink**) 02-04-2008, 08:59 AM

The function below will return true while the account history has a loss trade that closed at or after the opening of the 10:th past bar (current bar is 0),
and return false otherwise.

PHP Code:


			
bool postMortem()

{

    datetime since = Time[ bar+10 ];

    for ( int i = OrdersHistoryTotal() - 1; i >= 0; i-- ) {

        if ( ! OrderSelect( i, SELECT_BY_POS, MODE_HISTORY )

            continue;

        if ( OrderProfit() < 0 && OrderCloseTime() >= since )

            return( true );

    }

    return( false );

}

If you add that function to your EA, then include a statement like the following in the start() function, then Bob's your uncle.

PHP Code:


			
if ( postMortem() ) return( 0 );

mikerawson · #**668** (**permalink**) 02-04-2008, 07:10 PM

thx very much for that - i will try it
regards

la totona · #**669** (**permalink**) 02-06-2008, 08:29 PM

I have coded an expert. I want to open a position when the price is the same that one indicator. To do this i use the following sentence:

//to buy
double indicatorpast = icustom(....................,1);
double indicatornow = icustom(....................,0);

if (close[1]<indicatorpast && close[0]>indicatornow) OpenBUY();
if (close[1]>indicatorpast && close[0]<indicatornow) OpenSELL();

but with this satatement, the expert opens positions not only when the price cross the indicator, it opens position above the indicator too. I want that the expert open position ONLY when it cross the indicator, so i tried that:

//to buy
double indicatorpast = icustom(....................,1);
double indicatornow = icustom(....................,0);

if (close[1]<indicatorpast && close[0]==indicatornow) OpenBUY();
if (close[1]>indicatorpast && close[0]==indicatornow) OpenSELL();

But this statement it is not performing.

Do you know what is happen? Because i think there arent errors in the statement.

Regards.

SIDDESH · #**670** (**permalink**) 02-08-2008, 05:07 AM

Hi,

Can you please give the code for previous bar.

This can be used in the EA to limit placing the orders when the previous bar is more than certain height.

Regards,

SIDDESH

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

LinkBacks (?) LinkBack to this Thread: http://www.forex-tsd.com/metatrader-programming/554-how-code.html
Posted By	For	Type	Date
Need an experienced programmer? - Page 2	Post #0	Refback	09-24-2008 07:24 AM

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How to code this?	iscuba11	Metatrader 4 mql 4 - Development course	1	08-03-2007 05:22 PM

Register in Forex TSD!
Trading Systems Leaders in this forum (automated trading systems) are winning more than 3000 pips in a month (30000$ investing one lot every time). Click here to register and get more information