Simplest way to plot a vertical line on Indicator windows using Expert Advisor MQL5

Question

I am trying to plot a vertical line on the indicator window with its values. I came across OBJ_VLINE while reading the documentation. But the example is too hard to understand.
I have plotted the adx on the chart using the following expert:
input int Candles_for_adx = 5; input color maincolor_adx = Yellow, dpluscolor_adx=Lime,dminuscolor_adx = Red;

 void OnInit()
    {
    ChartIndicatorAdd(0,(int)ChartGetInteger(0,CHART_WINDOWS_TOTAL), 
 iCustom(_Symbol,PERIOD_M1,"ADX",Candles_for_adx,maincolor_adx,dpluscolor_adx,dminuscolor_adx) );
    }

I got the following in my output:

What I am expecting to achieve:

How to write simple statements taking the coordinates and then plot the line?

Answer 1

and what is the problem? vertical line is infinite, it has one parameter (OBJPROP_TIME or OBJPROP_TIME1) and no PRICE paramters. What you have on the chart is TREND_LINE, it is a line that has its start (OBJPROP_TIME1,OBJPROP_PRICE1) and end(OBJPROP_TIME2,OBJPROP_PRICE2) and ObjectSetInteger(0,name,OBJPROP_RAY,false);.

So after adding ADX to the chart (by the way, why it has so many parameters? is it a custom ADX? if so, please make sure you called it correctly), draw the lines using ObjectCreate(0,name,subwindow,0,0) and set all its parameters (color, start and end point, RAY=false, width and some other parameters) after checking that object is created successfully. Maybe you will need a special function ObjDrawTrendLine(const string name,const int subwindow,const datetime dtStart,const double dStart,const datetime dtEnd,const double dEnd,const color clr) that will draw such objects, or move them if name is same. Subwindow should be received from CHART_WINDOWS_TOTAL or externally.