Any questions from newcomers on MQL4 and MQL5, help and discussion on algorithms and codes - page 840

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What's wrong?

There is a template class

template <typename T>
class MyList{
 private:
    T *array[];
    int _size;
public:
    WavesList(){
        _size = 0;
    }
    void add(T &obj){
        _size++;
        ArrayResize(array, _size, 0);
        array[_size-1] = obj;
    }
    void cut(){
        delete array[_size-1];
        _size--;
        ArrayResize(array, _size, 0);
    }
    int size(){
        return _size;
    }
    T lastWave(){
        return array[size-1];
    }
};

Then in the code I try to make it like this:

MyList myList<OtherClass>();

It frowns!

 
Roman Sharanov:

Then I try to do this in the code:

It frowns!

I need it like this:

MyList<OtherClass> myList;

here's an example of how to work with templates postedat https://www.mql5.com/ru/forum/221917/page25#comment_11205772

see if you can use my code as an analogy to yours

Библиотека Generic классов - ошибки, описание, вопросы, особенности использования и предложения
Библиотека Generic классов - ошибки, описание, вопросы, особенности использования и предложения
  • 2019.04.03
  • www.mql5.com
С 6 декабря 2017 года в стандартную поставку MetaTrader 5 стали входить так называемые Generic-классы, реализующие эффективные алгоритмы для хранен...
 
Igor Makanu:

it has to be like this:

here's an example of how to work with the templates I postedhttps://www.mql5.com/ru/forum/221917/page25#comment_11205772

See if you can use my code to write yours

Thank you

 

is it possible to set the position of the text relative to the line ?

The line is created programmatically, the text is drawn above the line, but in some cases I need the text to be at the bottom...


how to do this ?


void paintShLine(datetime sdata, datetime edata, double bev, string nm, string txt, color cl)
   {
      ObjectCreate(0, nm, OBJ_TREND, 0, sdata, bev, edata, bev);
       
      //--- установим цвет линии
      ObjectSetInteger(0,nm,OBJPROP_COLOR,cl);
      //--- установим стиль отображения линии
      ObjectSetInteger(0,nm,OBJPROP_STYLE,STYLE_DASH);
      //--- установим толщину линии
      ObjectSetInteger(0,nm,OBJPROP_WIDTH,1);
      //--- включим (true) или отключим (false) режим продолжения отображения линии вправо
      ObjectSetInteger(0,nm,OBJPROP_RAY_RIGHT,true);
      ObjectSetInteger(0,nm,OBJPROP_RAY,true);    
      //--- отобразим на переднем (false) или заднем (true) плане
      ObjectSetInteger(0,nm,OBJPROP_BACK,true);
      //--- включим (true) или отключим (false) режим перемещения линии мышью
      ObjectSetInteger(0,nm,OBJPROP_SELECTABLE,false);
      ObjectSetInteger(0,nm,OBJPROP_SELECTED,false);
      //--- установим текст
      if (showShadowText) ObjectSetString(0,nm,OBJPROP_TEXT,"  "+txt);
      //--- скроем (true) или отобразим (false) имя графического объекта в списке объектов
      ObjectSetInteger(0,nm,OBJPROP_HIDDEN,true);
 }
 
Good afternoon,
I would like to make it so that when opening a buy trade the advisor compares the trading lot of the opened trade with the maximum trading lot and if the lot is above a certain value the advisor automatically closes the last trade.

in the example below I indicated that the advisor closes trades if the trading lot is above 2... How do you think this condition will work?

if ((typeLastOrder==OP_BUY && orderlots()>2 || typeLastOrder==OP_BUYSTOP && orderlots()>2 || typeLastOrder==OP_BUYLIMIT && orderlots()>2)){
Alert("no lot higher than 2 is allowed");
CloseDelete(lastTicket);
return;
}
 
Konstantins Korolkovs:
Afternoon,
I would like the Expert Advisor to compare the trade volume of the opened trade with the maximum trade volume, and if the volume is higher than a certain value, the Expert Advisor will automatically close the last trade.

In the example below, I have specified that the Expert Advisor should close trades if the trading lot is higher than 2. How do you think this condition will work?

if ((typeLastOrder==OP_BUY && orderlots()>2 || typeLastOrder==OP_BUYSTOP && orderlots()>2 || typeLastOrder==OP_BUYLIMIT && orderlots()>2)){
Alert("lot higher than 2 may not be used");
CloseDelete(lastTicket);
return;
}

And why should I open and then close it right away? Maybe it's better not to open at all?

 
Alexey Viktorov:

Why open first and then close immediately? Wouldn't it be better not to open at all?

To control your greed

 

Help shift left, right or horizontally the tick numbers on top of the candles as red, green, yellow are rare. These numbers move vertically, but I can't do it horizontally. I want them to be in front of the candle to which they belong. The code of indicator:


//+------------------------------------------------------------------+

//| Fine volumes.mq4 |
//| eevviill |
//| itisallillusion@gmail.com |
//+------------------------------------------------------------------+
#property copyright "Aliev"
#property link "businessystems.ru "

#property indicator_separate_window
#property indicator_minimum 0
#property indicator_buffers 6

#property indicator_width1 2
#property indicator_width2 2
#property indicator_width3 2
#property indicator_width4 4
#property indicator_width5 4

#property indicator_color1 SkyBlue
#property indicator_color2 Maroon
#property indicator_color3 Yellow
#property indicator_color4 Blue
#property indicator_color5 Red



extern int BarsToCount = 400;

extern string pus1 = "";
extern string p_s = "Points settings";
extern bool use_points = true;
extern int distance_point = 80;
extern color color_point_u = Lime;
extern color color_point_d = Red;
extern color color_point_s = Yellow;
extern int size_point = 6;

extern string pus2 = "";
extern string s_w = "Way";
extern bool use_show_same_way = true;
extern bool use_show_daily_way = true;

extern string pus3 = "";
extern string al = "Alerts";
extern bool use_alerts = false;
extern string up_alert = "Up";
extern string down_alert = "Down";




double up[];
double down[];
double mid[];
double up2[];
double down2[];
double none[];

static int prevtime = 0;

///////////////////////////////////////
int init()
{
SetIndexStyle(0,DRAW_HISTOGRAM);
SetIndexBuffer(0,up);
SetIndexStyle(1,DRAW_HISTOGRAM);
SetIndexBuffer(1,down);
SetIndexStyle(2,DRAW_HISTOGRAM);
SetIndexBuffer(2,mid);
SetIndexStyle(3,DRAW_HISTOGRAM);
SetIndexBuffer(3,up2);
SetIndexStyle(4,DRAW_HISTOGRAM);
SetIndexBuffer(4,down2);
SetIndexStyle(5,DRAW_NONE);
SetIndexBuffer(5,none);


IndicatorShortName("Aliev FX Volumes");


return(0);
}

///////////////////////////////////////
int deinit()
{
string name_de;
for(int c=BarsToCount;c>=0;c--)
{
name_de="Vol_"+DoubleToStr(c,0);
if(ObjectFind(name_de)!=-1) ObjectDelete(name_de);
}
return(0);
}


//////////////////////////////////////////
int start()
{
////////////
up[0]=EMPTY_VALUE;
down[0]=EMPTY_VALUE;
mid[0]=EMPTY_VALUE;
if(Close[0]>Open[0]) up[0]=Volume[0];
if(Close[0]<Open[0]) down[0]=Volume[0];
if(Close[0]==Open[0]) mid[0]=Volume[0];

////////////////
if(use_points)
Ob_cre(0);

if(!use_points)
Ob_del(0);
////////
if(use_show_daily_way)
Ob_cre2();
if(!use_show_daily_way)
Ob_del2();

////////////
if (Time[0] == prevtime) return(0);
prevtime = Time[0];
///////////////////////////
for(int c=BarsToCount;c>=1;c--)
{
////////////
if(use_points)
Ob_cre(c);

if(!use_points)
Ob_del(c);
////////////
up[c]=EMPTY_VALUE;
down[c]=EMPTY_VALUE;
mid[c]=EMPTY_VALUE;
up2[c]=EMPTY_VALUE;
down2[c]=EMPTY_VALUE;




/////////////////
if(Close[c]>Open[c]) up[c]=Volume[c];
if(Close[c]<Open[c]) down[c]=Volume[c];
if(Close[c]==Open[c]) mid[c]=Volume[c];
none[c]=Volume[c]+Volume[c]/6;


//////////////
if(use_show_same_way)
{

if(Close[c]>Open[c] && Close[c+1]>Open[c+1])
{
up2[c]=Volume[c]; up2[c+1]=Volume[c+1];
up[c]=EMPTY_VALUE; up[c+1]=EMPTY_VALUE;
}

if(Close[c]<Open[c] && Close[c+1]<Open[c+1])
{
down2[c]=Volume[c]; down2[c+1]=Volume[c+1];
down[c]=EMPTY_VALUE; down[c+1]=EMPTY_VALUE;
}

}


if(use_alerts)
{
if(up2[1]!=EMPTY_VALUE && up2[4]==EMPTY_VALUE) Alert(up_alert);
if(down2[1]!=EMPTY_VALUE && down2[4]==EMPTY_VALUE) Alert(down_alert);
}



}
return(0);
}
//func
//+------------------------------------------------------------------+///////////////////////////////
void Ob_cre(int num_of_bar)
{
string name="Vol_"+DoubleToStr(num_of_bar,0);

color col_po;
if(Close[num_of_bar]>Open[num_of_bar]) col_po=color_point_u;
if(Close[num_of_bar]<Open[num_of_bar]) col_po=color_point_d;
if(Close[num_of_bar]==Open[num_of_bar]) col_po=color_point_s;

if(ObjectFind(name)==-1)
{
ObjectCreate(name,OBJ_TEXT,0,0)
}
ObjectSet(name,OBJPROP_TIME1,Time[num_of_bar]);
ObjectSet(name,OBJPROP_PRICE1,High[num_of_bar]+distance_point*Point);
ObjectSet(name,OBJPROP_ANGLE,90);
ObjectSetText(name,DoubleToStr(Volume[num_of_bar],0),size_point, "Arrial",col_po);


}

/////////////////////////////////////////
void Ob_cre2()
{
int Num_of_win = WindowFind("Aliev FX Volumes");

if(ObjectFind("D_w")==-1)
{
ObjectCreate("D_w",OBJ_LABEL,Num_of_win,0,0);
ObjectSet("D_w",OBJPROP_CORNER,1);
ObjectSet("D_w",OBJPROP_XDISTANCE,20);
ObjectSet("D_w",OBJPROP_YDISTANCE,20);
ObjectSetText("D_w", "Daily volume",10, "Arrial",White);
}


if(ObjectFind("D_w_v")==-1)
{
ObjectCreate("D_w_v",OBJ_LABEL,Num_of_win,0,0);
ObjectSet("D_w_v",OBJPROP_CORNER,1);
ObjectSet("D_w_v",OBJPROP_XDISTANCE,20);
ObjectSet("D_w_v",OBJPROP_YDISTANCE,45);
}
color vol_col;
if(iClose(Symbol(),PERIOD_D1,0)>iOpen(Symbol(),PERIOD_D1,0)) vol_col=Lime;
if(iClose(Symbol(),PERIOD_D1,0)<iOpen(Symbol(),PERIOD_D1,0)) vol_col=OrangeRed;

ObjectSetText("D_w_v",DoubleToStr(iVolume(Symbol(),PERIOD_D1,0),0),12, "Arrial",vol_col);


}

/////////////////////////////////////////////////////////////////
void Ob_del(int num_of_bar)
{
string name="vol_"+DoubleToStr(num_of_bar,0);

if(ObjectFind(name)!=-1)
{
ObjectDelete(name);
}


}

/////////////////////////////////////////
void Ob_del2()
{
if(ObjectFind("D_w")!=-1)
ObjectDelete("D_w");


if(ObjectFind("D_w_v")!=-1)
ObjectDelete("D_w_v");



}
 
koctja:

Help move left, right or horizontally the tick numbers on top of the candles as red, green, yellow are rare. These numbers move vertically, but I can't do it horizontally. I want them to be in front of the candle to which they belong. The code of indicator:


I would just put a space in front of the number in such cases (if printing horizontally)...
 
koctja:

Help shift left, right or horizontally the tick numbers on top of the candles as red, green, yellow are rare. These numbers move vertically, but I can't do it horizontally. I want them to be in front of the candle to which they belong. The code of indicator:

Try toset the anchor point for theOBJ_TEXT objectin the


ANCHOR_CENTER

The anchor point is strictly in the object centre


ObjectSetInteger(0,name,OBJPROP_ANCHOR,ANCHOR_CENTER);
1...833834835836837838839840841842843844845846847...1965
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