Draw vertical line on each Minute with DrawOnLastBarOnly = true

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06/28/2023 at 10:41 AM #216911 quote

PeterSt
Participant

Master

This is a question which I only have because it intrigues me. Without a solution I will survive.

Suppose I have a TimeFrame of 1 minute. I need DefParam DrawOnLastBar = true for various reasons. Now, what would be a sample code which draws a line on each minute mark which line will stay throughout the progress of the chart ?

I am as far as having the vertical line persistent for the last minute, that line disappearing if the new minute begins and the new line is drawn. I won’t even show the hoopla-code I have for it, because what I am doing is all stupid tweaking only to get that.

I must be missing the point completely because something simple like this should be … well, simple.

Thanks !

image_2023-06-28_113624846.png

06/28/2023 at 11:15 PM #216943 quote
robertogozzi
Moderator

Legend
You can use arrays. This indicator will always plot the last 10 vertical lines, each new bar:
```
DEFPARAM DrawOnLastBarOnly = true
MaxLines = 10                                                 //plot the last 10 lines
// initializations of the array
IF BarIndex = 0 THEN
   FOR i = 1 TO MaxLines
      $myLine[i] = 0
   NEXT
ENDIF
myDrawingConditions = (summation[3](close > close[1]) = 3)    //or whatever conditions you need to set
// each time a new line has to be plotted, the oldest one must be dropped
IF myDrawingConditions THEN
   FOR i = 2 TO MaxLines
      $myLine[i - 1] = $myLine[i]
   NEXT
   $myLine[MaxLines] = BarIndex
ENDIF
IF $myLine[MaxLines] <> 0 THEN
   FOR i = 1 TO MaxLines
      IF $myLine[i] <> 0 THEN
        DrawVLine($myLine[i]) coloured("Fuchsia",255) style(DottedLine,2)
      ENDIF
   NEXT
ENDIF
RETURN
```
PeterSt thanked this post
06/29/2023 at 4:18 AM #216952 quote
PeterSt
Participant

Master
Thanks a lot, Roberto. Works beautifully.
```
myDrawingConditions = minute <> minute[1]
```
Although I got the hang now, I would still advise PRT to make something for this so people would understand intuitively. It could be as easy as
```
DrawSetting = 0   // 0 = DrawOnLastBarOnly = false.
DrawVLine(BarIndex) coloured("Fuchsia",255) style(DottedLine,2,DrawSetting)   // DrawSetting is new option on the Style clause.
```
image_2023-06-29_050551538.png
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