Any questions from newcomers on MQL4 and MQL5, help and discussion on algorithms and codes - page 948

[[Deleted]]

As far as I remember, one of the terminal upgrades added the possibility to automatically load quotes into a user tool,

as if they came from a broker.

What's up? Please send me the manual.

thanks

[Artyom Trishkin]

barashka:

As far as I remember, one of the terminal upgrades added the possibility to automatically load quotes into a user tool,

as if they came from a broker.

What's up? Please send me the manual.

Thank you

If you would be so kind as to use the search engine.

I've got my doubts... (с)

[Evgeny Potapov]

Artyom Trishkin:

Is this suitable for MT4?

[Artyom Trishkin]

Evgeny Potapov:

Is this suitable for MT4?

What exactly is "it"?

[Evgeny Potapov]

Artyom Trishkin:

What exactly is "it"?

I'm looking for some class or example of scrollbar organization in MQL4, not in MQL5

[Igor Makanu]

Evgeny Potapov:

I'm looking for some class or example of scrollbar organization in MQL4, not in MQL5

In 90% of cases the codes between MQL4 and MQL5 are compatible, the main difference is in trading operations and working with strategy tester

99% compatible in the graphical part - there was a small difference in the standard library, or maybe the developers have already fixed it.

[Evgeny Potapov]

Igor Makanu:

In 90% of cases codes between MQL4 and MQL5 are compatible, the main difference is in trading operations and working with the strategy tester.

99% compatible in the graphical part - there was a small difference in the standard library, maybe the developers have already fixed it.

I'm getting an error:

testscrollbar EURUSD,M1: indicator on custom buffer is not supported yet

I would like to see a working code (in MT4) and deal with it.

[Igor Makanu]

Evgeny Potapov:

I'm getting an error:

I would like to see a working code (in MT4), and deal with it.

search the forum - I won't search

here's something similar not long ago helped to sort outhttps://www.mql5.com/ru/forum/320293/page3#comment_12887682

[Evgeny Potapov]

Igor Makanu:

search the forum - I won't search

here's something similar not long ago helped to sort outhttps://www.mql5.com/ru/forum/320293/page3#comment_12887682

Thank you! It works! This is great!

And the slider shift event handling functions are present!

Can you suggest how to expand the scroll bar vertically?

[Yevhenii Levchenko]

Why is sometimes the null buffer element displayed incorrectly?

Code:

int Limit = rates_total - prev_calculated; 
       if (prev_calculated > 0)
         Limit++;
       if(prev_calculated==0) Limit--;
         
         for(int i=Limit; i>-1; i--){
         
            if (startTime!=isTime(i)){
                  startTime=isTime(i);
                  startPriceCur=Open[iBarShift(NULL, NULL,startTime,false)];
                 
                             Comment("time: ", isTime(i));
            }
            
            if(Close[i]>startPriceCur)
            CurrentCurrencyBuffer[i]=100-(100*startPriceCur/Close[i]);
            if(Close[i]<startPriceCur)
            CurrentCurrencyBuffer[i]=(Close[i]*100/startPriceCur)-100;
            if(Close[i]==startPriceCur)
            CurrentCurrencyBuffer[i]=0;
            
         }

I added a limiter, according to which the algorithm calculates only once, when a new bar appears. With this approach it displays correctly:

if(controller<Bars){
 
       int Limit = rates_total - prev_calculated; 
       if (prev_calculated > 0)
         Limit++;
       if(prev_calculated==0) Limit--;
        
         for(int i=Limit; i>-1; i--){
         
            if (startTime!=isTime(i)){
                  startTime=isTime(i);
                  startPriceCur=Open[iBarShift(NULL, NULL,startTime,false)];
                 
                             Comment("time: ", isTime(i));
            }
            
            if(Close[i]>startPriceCur)
            CurrentCurrencyBuffer[i]=100-(100*startPriceCur/Close[i]);
            if(Close[i]<startPriceCur)
            CurrentCurrencyBuffer[i]=(Close[i]*100/startPriceCur)-100;
            if(Close[i]==startPriceCur)
            CurrentCurrencyBuffer[i]=0;
            
         }
        controller=Bars;
}

But this algorithm calculates zero bar only at opening. I would like it to be counted all the time (and correctly). How can this be fixed?