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Questions from Beginners MQL5 MT5 MetaTrader 5 - page 490

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FXMigor:
I will help in any way I can. I, too, have had help from experienced traders in my time. I have been trading since 2008. I don't take money from people because I take it (the green stuff) from the market. I do not take money from people, it's the money I take from the market. That's enough for me!
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Good evening,

Please advise on a general question.

TheExpert Advisor Ais written. Inside it, only the indicator B is written. In the onTick section the calculated indicator value is saved in the b1 variable.

So every time new price appears, the indicator will be recalculated and b1 will be updated?

kashi_ann:

Good evening,

Please advise on a general question.

TheExpert Advisor Ais written. Inside it, only the indicator B is written. In the onTick section the calculated indicator value is saved in the b1 variable.

So every time new price appears, the indicator will be recalculated and b1 will be updated?

Yes
[Deleted]
kashi_ann:

Good evening,

Please advise on a general question.

TheExpert Advisor Ais written. There is only indicator B inside it. In the onTick section the calculated indicator value is saved in the b1 variable.

So every time new price appears, the indicator will be recalculated and b1 will be updated?

It depends on how the indicator is written. If it has the logic of the zero candle refreshing, then yes. If not, then the indicator will be updated only with the arrival of a new candle. The variant of the total recalculation of the indicator on every tick is also possible.

Good day!

Dear forum members, I would like to know what exactly is meant by a "tick" in metatrader4. Is it a Bid or Ask price change? Or it makes no difference whether the tick handler is triggered in both cases?

Vasua:

Good day!

Dear forum members, I would like to know what exactly is meant by a "tick" in metatrader4. Is it a Bid or Ask price change? Or it makes no difference whether the tick handler is triggered in both cases?

In either case. A tick is a price change.
Vasua:

Good day!

Dear forum members, I would like to know what exactly is meant by a "tick" in metatrader4. Is it a Bid or Ask price change? Or there is no difference and in both cases the tick handler will work?

OnTick misses 50-70% of price changes (last) comparing to OnBookEvent. I don't quite understand who needs it and why they need it at all. The documentation says right away that several ticks can come to the terminal simultaneously and create only one ontick event.

In theory, it's more reasonable to use OnBookEvent and then filter out the necessary changes.

But I have a problem here too. It looks like this:

void OnBookEvent(const string &symbol)
  {
   if(symbol==_Symbol) // Нужный символ
     { 
      MqlTick mtick[];
      CopyTicks(_Symbol,mtick,COPY_TICKS_ALL,0,1); // Скопировали структуру с последним тиком
      lastprice=mtick[0].last; // Взяли из него последнюю сделку

      if(lastprice!=lastprice1) // Сравнили с предыдущим тиком
        {
//Записали всю информацию в лог
logger.write("Время: "+(string)mtick[0].time+" Bid: "+(string)mtick[0].bid+" Ask: "+(string)mtick[0].ask+" Last: "+(string)mtick[0].last+" Volume: "+(string)mtick[0].volume+" Flags: "+(string)mtick[0].flags);
// "тик изменил цену последней сделки"
if (mtick[0].flags & TICK_FLAG_LAST) {logger.write("Last: "+(string)mtick[0].last+" Volume: "+(string)mtick[0].volume+" Flags: "+(string)mtick[0].flags);}
lastprice1=lastprice;
}
}
}

The result is about the following:

notice:|:12:06:40    Время: 2016.01.06 12:06:39 Bid: 75336 Ask: 75339 Last: 75337 Volume: 3 Flags: 2
notice:|:12:06:41    Время: 2016.01.06 12:06:40 Bid: 75337 Ask: 75341 Last: 75340 Volume: 25 Flags: 2
notice:|:12:06:42    Время: 2016.01.06 12:06:41 Bid: 75336 Ask: 75339 Last: 75339 Volume: 1 Flags: 24
notice:|:12:06:42    Last: 75339 Volume: 1 Flags: 24
notice:|:12:06:44    Время: 2016.01.06 12:06:43 Bid: 75337 Ask: 75338 Last: 75338 Volume: 1 Flags: 4
notice:|:12:06:46    Время: 2016.01.06 12:06:45 Bid: 75329 Ask: 75331 Last: 75330 Volume: 5 Flags: 24
notice:|:12:06:46    Last: 75330 Volume: 5 Flags: 24
notice:|:12:06:50    Время: 2016.01.06 12:06:49 Bid: 75328 Ask: 75332 Last: 75328 Volume: 4 Flags: 24
notice:|:12:06:50    Last: 75328 Volume: 4 Flags: 24
notice:|:12:06:52    Время: 2016.01.06 12:06:51 Bid: 75327 Ask: 75329 Last: 75327 Volume: 127 Flags: 24
notice:|:12:06:52    Last: 75327 Volume: 127 Flags: 24
notice:|:12:06:53    Время: 2016.01.06 12:06:52 Bid: 75328 Ask: 75331 Last: 75330 Volume: 3 Flags: 2
notice:|:12:06:54    Время: 2016.01.06 12:06:53 Bid: 75328 Ask: 75329 Last: 75331 Volume: 1 Flags: 2
notice:|:12:06:55    Время: 2016.01.06 12:06:54 Bid: 75325 Ask: 75326 Last: 75325 Volume: 1 Flags: 24
notice:|:12:06:55    Last: 75325 Volume: 1 Flags: 24
notice:|:12:06:56    Время: 2016.01.06 12:06:55 Bid: 75321 Ask: 75323 Last: 75322 Volume: 2 Flags: 4
notice:|:12:06:57    Время: 2016.01.06 12:06:56 Bid: 75321 Ask: 75323 Last: 75323 Volume: 4 Flags: 24
notice:|:12:06:57    Last: 75323 Volume: 4 Flags: 24

I.e. last is different but the flag is notTICK_FLAG_LAST.

What am I doing wrong?

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