Any questions from newcomers on MQL4 and MQL5, help and discussion on algorithms and codes - page 627

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Sergey Likho:

Can you tell me how to calculate the collateral for a transaction?


Tried two approaches

(0.1 * Ask*MarketInfo(Symbol(),MODE_LOTSIZE))/AccountInfoInteger(ACCOUNT_LEVERAGE)


And this one

FreeMarginCheck=AccountFreeMarginCheck(Symbol(),OP_BUY,0.1);

 double val=AccountFreeMargin()-FreeMarginCheck;



The first one gives strange results on EURJPY if my deposit currency is USD. Do I need to add something to the formula?

The second also works only once, sometimes it gives the right value, sometimes it gives some nonsense (it depends on the deposit)

The second variant is the correct way to calculate the deposit. To be more exact, the variable val shows the value of free funds after the order has been placed and the variableFreeMarginCheck shows the value of the deposit itself

 
Igor Makanu:

The second option is the correct way to calculate the margin, or rather you get the value of free funds in the val variable after placing an order, and the variableFreeMarginCheck is the value of the margin itself

Are you sure?

AccountFreeMarginCheck

Returns the amount of free funds that will remain after the specified order is opened at the current price in the current account.


There is also a subtlety there:

If counter trades are open, i.e. there is a full or incomplete lock on the account, the function may give incorrect values.


 
Sergey Likho:

Are you sure?

Yes, you're right, that's exactly right:

Returns the amount of free fundsremaining after opening the specified order at the current price in the current account.

about open trades, you need to check, I don't remember, but most likely what the terminal writes, should agree with calculated data: the total number of lots in each direction of trades (BAY/SELL) for all symbols then call for each symbol

AccountFreeMarginCheck() passing lots in each direction and summing up these results

The market is working today, it's easy to check it, like this

#property strict
//+------------------------------------------------------------------+
void OnStart()
  {
   int i,ot,k=OrdersTotal();
   double lot_buy=0.0,lot_sell=0.0;
   string sy=Symbol();
   for(i=0; i<k; i++)
     {
      if(OrderSelect(i,SELECT_BY_POS,MODE_TRADES))
        {
         ot=OrderType();
         if(OrderSymbol()==sy)
           {
            if(ot==OP_BUY)  lot_buy+=OrderLots();
            if(ot==OP_SELL) lot_sell+=OrderLots();
           }
        }
     }
   double MarginBUY  = AccountFreeMargin()-AccountFreeMarginCheck(sy,OP_BUY,lot_buy);
   double MarginSELL = AccountFreeMargin()-AccountFreeMarginCheck(sy,OP_SELL,lot_sell);
   double MarginALL = MarginBUY+MarginSELL;
   Print("Залог BUY = ",MarginBUY);
   Print("Залог SELL = ",MarginSELL);
   Print("Залог ALL = ",MarginALL);
  }
 

Greetings, could you tell me what's wrong with the function? The function performs a trade pause by time, the parameters are pause start and pause end.
The function reads the time not from the broker's server, but from the computer, despite the fact that TimeCurrent is prescribed. In general, trades are closed during the pause, i.e. the function does not work.

input  bool        p                 = true;    // Trading pause on/off
input  string      TimeStart         = "23:59"; // Start pause
input  string      TimeEnd           = "06:15"; // End of pause


int start() {

   //+----------------------------------------------------------------------------+
   datetime StartPause,EndPause;
   // ---
   StartPause = StrToTime(TimeStart);
   EndPause   = StrToTime(TimeEnd);
   // ---
   if((p && StartPause > EndPause && (TimeCurrent() > StartPause || TimeCurrent() < EndPause)))
   {
     Print(" Pause the EA ");
     return(0);
   }
   //+----------------------------------------------------------------------------+
 
Anatolij Anufriev:

Greetings, could you tell me what's wrong with the function? The function performs a trade pause by time, the parameters include the start of the pause and the end of the pause.
The function reads the time not from the broker's server, but from the computer, despite the fact that TimeCurrent is prescribed. In general, trades are closed during a pause, it means that the function doesn't work.

UnprintTimeStart andStrToTime(TimeStart);

then unprintTimeCurrent()

yourTimeStart is not in full datetime format, i.e. the time will always be the current day, month and year when you run the EA, and then it will change?

And globally ... to determine the hours and minutes of trading hours and minutes should be compared to the hour and minute server time, you only compare the fact that the server time is longer than the specified one

SZZ: to save confusion, you maythink of datetime as an int, which it is and comparing 2datetime, you are comparing 2 int

PSPS:

if((p && StartPause > EndPause && (TimeCurrent() > StartPause || TimeCurrent() < EndPause)))

your code will probably work, you should try it that way:

if((p && StartPause > EndPause && (TimeCurrent() > StartPause && TimeCurrent() < EndPause)))


I usually count time this way:

int h = TimeHour(TimeCurrent());

int m = TimeMinute(TimeCurrent());

and then compare it with the EA settings

 
Igor Makanu:

Thanks, I'll try to figure it out, I'm just a beginner), with && option instead of || I haven't tried online yet, by the way in tester this code works, it reads time from terminal, no closing of orders during pause, but online it's different.

 

Hello! The terminal does not start in the strategy tester. I set the date, for example (2017,04,01 to 2018,05,29), press start, it immediately gives a stop. In the log it says the following,

TestGenerator: no history data 'EURUSD30' from 2017.04.01 to 2018.05.29. And so on any segment. My computer is working, I thought it might not have enough RAM. Same thing on home computer, restarting doesn't help, but it runs for a while. I have downloaded the Expert Advisor from the Market, trial. If anybody knows the reason, please advise?


 
danil77783:

Hello! The terminal does not start in the strategy tester. I set the date, for example (2017,04,01 to 2018,05,29), press start, it immediately gives a stop. In the log it says the following,

TestGenerator: no history data 'EURUSD30' from 2017.04.01 to 2018.05.29. And so on any segment. My computer is working, I thought it might not have enough RAM. Same thing on home computer, restarting doesn't help, but it runs for a while. I have downloaded the Expert Advisor from the Market, trial. If I have any idea of the reason, can you please give me a hint?


I think the tester says there is no history data, press F2 and download the history, then reboot the terminal

 
danil77783:

Hello! The terminal does not start in the strategy tester. I set the date, for example (2017,04,01 to 2018,05,29), press start, it immediately gives a stop. In the log it says the following,

TestGenerator: no history data 'EURUSD30' from 2017.04.01 to 2018.05.29. And so on any segment. My computer is working, I thought it might not have enough RAM. Same thing on home computer, restarting doesn't help, but it runs for a while. I have downloaded the Expert Advisor from the Market, trial. If i know the reason, please advise?


Doesno history data mean anything?

 
Igor Makanu:

It looks like the tester is telling you there is no history data, press F2 and download the history, then reload the terminal

Thank you! I will give it a try. Does updating the terminal affect it in any way? Whether it's updated or not, although it will tell you so itself......

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