Simple question on OBJPROP_WIDTH

[Ernie Gunning]

Hi

 I need to draw a horizontal line that spreads over a certain amount of pips. I noted the documentation on OBJPROP_WIDTH doesn't specifies what the width actualy represents? Does it represent pixels or pips?

I did a test and it is definitaly not pips because of the scaling diffrence of each window.

 

How can I calculate a width to be exactly 10 pips for example? 

[Ernie Gunning]

I still couldn't find a solution to this. Is it possible to adjust the Cart in such a way that the line width will over shadow 10 pips (the example I used above).

 I could only find these chart operations however I need more info on them, anybody have some ideas? 

CHART_SCALE	Scale ( what is the scale diffrence between 0 and 1?? )	int        from 0 to 5
CHART_SCALEFIX	Fixed scale mode ( If I set this to true, where do I spesifiy the scale?)	bool
CHART_SCALEFIX_11	Scale 1:1 mode	bool
CHART_SCALE_PT_PER_BAR	Scale to be specified in points per bar ( if this is true, where do I spesify the points per bar )	bool

 

Stuff I tried:

Set the chart to 1to1 and draw the line with a width of 10, hoping that when the chart is on 1to1, 1 pixel will be one pip. this didn't work. 

[Ernie Gunning]

It seems I've been looking at the wrong place to get my information. I created a horizontal line using ObjectCreate.

 When getting the properties below using ObjectGetInteget() they return 0. I'm looking for a property that would return the width of my horizontal line in points and NOT pixels.

 

OBJPROP_XSIZE	The size of the Chart object  along the X axis (width in pixels)	int
OBJPROP_YSIZE	The size of the Chart object  along the Y axis (height in pixels)	int
OBJPROP_XOFFSET	The X coordinate of the upper left corner of the rectangular visible area in the graphical objects "Bitmap Label" and "Bitmap" (OBJ_BITMAP_LABEL and OBJ_BITMAP). The value is set in pixels relative to the upper left corner of the original image.	int
OBJPROP_YOFFSET	The Y coordinate of the upper left corner of the rectangular visible area in the graphical objects "Bitmap Label" and "Bitmap" (OBJ_BITMAP_LABEL and OBJ_BITMAP). The value is set in pixels relative to the upper left corner of the original image.	int

I was expecting OBJPROP_YSIZE to return what I needed but like it stipulates ...pixels

anyidea? 

What do I want to do?

I want to write a support and resistance indicator that draws horizontal lines in the back ground and change the color when getting to support or resistance lines.

I have attached simple script to prove my point that these properties dont return anything.

please help! I need points not pixels...

 

 

[[Deleted]]

Hi toolmaker,

Have you consider using a rectangle instead of an horizontal line. If you set the time parameters to the oldest bar and some time after the most recent bar you get what you want. Price parameters can be set to meet your needs in points and will maintain when you rescale your chart. Try the code below in a script.

 /////////////////////

 datetime time[];
 ArraySetAsSeries(time,true);
 bool copied_time=CopyTime(NULL,0,0,Bars(_Symbol,_Period),time);
 int bars = ArraySize(time);
  
  
 MqlRates rates[];
 ArraySetAsSeries(rates,true);
 bool copied_rates = CopyRates(_Symbol,_Period,0,100,rates);

  
 datetime time1 = time[0]+(60*60*24*30); //bottom right corner 
 datetime time2 = time[bars-1];//top left corner
  
 double price1 = rates[0].close;//bottom right corner
 double price2 = rates[0].close - (100*_Point);//top left corner
  
 bool created=ObjectCreate(0,"Rectangle",OBJ_RECTANGLE,0,time1,price1,time2,price2);
 if(created)
    {
     ObjectSetInteger (0, "Rectangle", OBJPROP_FILL, true);
     ObjectSetInteger (0, "Rectangle", OBJPROP_BACK, true);
     ObjectSetInteger (0, "Rectangle", OBJPROP_COLOR, color(Green));
    
    }

 //////////////////

 

to change the color is easy once the object is created

 

////////

ObjectSetInteger(0,"Rectangle",OBJPROP_COLOR,color(Red)); 

 ///////

 

Hope it helps, regards 

[Ernie Gunning]

m.a.chambel:

Hi toolmaker,

Have you consider using a rectangle instead of an horizontal line. If you set the time parameters to the oldest bar and some time after the most recent bar you get what you want. Price parameters can be set to meet your needs in points and will maintain when you rescale your chart. Try the code below in a script.

 /////////////////////

 datetime time[];
 ArraySetAsSeries(time,true);
 bool copied_time=CopyTime(NULL,0,0,Bars(_Symbol,_Period),time);
 int bars = ArraySize(time);
  
  
 MqlRates rates[];
 ArraySetAsSeries(rates,true);
 bool copied_rates = CopyRates(_Symbol,_Period,0,100,rates);

  
 datetime time1 = time[0]+(60*60*24*30); //bottom right corner 
 datetime time2 = time[bars-1];//top left corner
  
 double price1 = rates[0].close;//bottom right corner
 double price2 = rates[0].close - (100*_Point);//top left corner
  
 bool created=ObjectCreate(0,"Rectangle",OBJ_RECTANGLE,0,time1,price1,time2,price2);
 if(created)
    {
     ObjectSetInteger (0, "Rectangle", OBJPROP_FILL, true);
     ObjectSetInteger (0, "Rectangle", OBJPROP_BACK, true);
     ObjectSetInteger (0, "Rectangle", OBJPROP_COLOR, color(Green));
    
    }

 //////////////////

 

to change the color is easy once the object is created

 

////////

ObjectSetInteger(0,"Rectangle",OBJPROP_COLOR,color(Red)); 

 ///////

 

Hope it helps, regards 

Thanks for this simple answer :) this is exactly what I need. 

[Ernie Gunning]

HI,

 

Just to help make thing easier because I couldn't find my solution in the documentation. I draw my rectangle but I had to modify the size as new bars appeared. I couldn't find this anywhere except on one articable.

 

if you need to modify the coordinates use the code below:

ObjectSetInteger(ChartID(),LineName,OBJPROP_TIME,0,StartTimeFrame);
ObjectSetDouble(ChartID(),LineName,OBJPROP_PRICE,0,StartPoint);
ObjectSetInteger(ChartID(),LineName,OBJPROP_TIME,1,rates.time);
ObjectSetDouble(ChartID(),LineName,OBJPROP_PRICE,1,EndPoint);