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start of a new bar in m30 timeframe

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hello all,


just wanna know how to identify start of new candle in mq4 ..seen itime but can't understand it what value it returns.

iTime()  returns a datetime variable . . 

datetime M30Bar1Time;


if(iTime(NULL, PERIOD_M30, 1) != M30Bar1Time)
   {
   //  we have a new M30 bar . . . .
   
   M30Bar1Time = iTime(NULL, PERIOD_M30, 1);
   }
it keeps on repeating..ie with each tick  the condition if(iTime(NULL, PERIOD_M30, 1) != M30Bar1Time)
get fulfilled ....i have to be alerted only once when new bar forms..  
ankit29030:
it keeps on repeating..ie with each tick  the condition if(iTime(NULL, PERIOD_M30, 1) != M30Bar1Time)
My code doesn't . . .  show your code.
ankit29030: just wanna know how to identify start of new candle in mq4 ..seen itime but can't understand it what value it returns.
  1. datetime M30Bar1Time;


if(iTime(NULL, PERIOD_M30, 1) != M30Bar1Time)
   {
   //  we have a new M30 bar . . . .
   
   M30Bar1Time = iTime(NULL, PERIOD_M30, 1);
   }
    IFF M30Bar1Time is static or common (global scope) that will identify the start of a new M30 bar
  2. Also you can compute directly:
    static datetime timeM30;
datetime now = TimeCurrent(),
         tM30= now - now % 1800;
if (timeM30 == tM30) return; timeM30 = tM30;
// start of a new M30 bar.
  3. If you want to identify the start of a new candle on the chart time frame:
    static datetime time0; if (time0 == Time[0]) return; time0 = Time[0];
// start of a new bar.

RaptorUK:

iTime()  returns a datetime variable . . 

 

 

int start()
  {
datetime M30Bar1Time;


if(iTime(NULL, PERIOD_M30, 1) != M30Bar1Time)
   {
   Alert("  we have a new M30 bar . . . .");
   
   M30Bar1Time = iTime(NULL, PERIOD_M30, 1);
   }
   return(0);
  }

see with each tick it gives an alert "new bar formation"



Read WHRoeder post. He told you to use static.
ankit29030:

see with each tick it gives an alert "new bar formation"

You were meant to read what I posted and understand it before using it . . .   this should be a globally declared variable . . .  not local to start()

datetime M30Bar1Time;
RaptorUK:

You were meant to read what I posted and understand it before using it . . .   this should be a globally declared variable . . .  not local to start()

 


u wont told me to declare it globally.i was following your post..anyways the problems being solved.
ankit29030:

u wont told me to declare it globally.i was following your post..anyways the problems being solved.

I didn't tell you to copy and paste my code directly into start() either but you took the decision to do it,  take responsibility for "your" code.  If I told you to add this to your code and follow the instructions in every Alert it made would you ?

Alert("Hurry, the end of the world is today,  find a cliff and jump ! ! ! !");

 
The important thing is that you understand why the code that you used did what it did . . . .  do you understand why using a globally declared variable fixes the problem ?  do you know what a static variable is ?

RaptorUK:

iTime()  returns a datetime variable . . 

 

 


sir this condition executes 2 -3 times during a bar formation....wat to do??
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