What is the work around

[EightySix]

input Length = 20;
def Strt = BarNumber() - Length;
Plot Start = if barnumber()==Strt then MovAvgP else double.NaN;
Start.SetPaintingStrategy(paintingStrategy = PaintingStrategy.TRIANGLES);

The above code doesn't work but once i change the strt to a number "Constant" instead of a mathmatical operation it works. Can anyone explain why this happens and what is the work around please?


It only plots when I do the following

input Length = 20;
def Strt = BarNumber() - Length;
Plot Start = if barnumber()==333 then MovAvgP else double.NaN;
Start.SetPaintingStrategy(paintingStrategy = PaintingStrategy.TRIANGLES);

so it seems BarNumber() doesn't work arguments only with constants


thanks in advance

 

[halcyonguy]

input Length = 20;
def Strt = BarNumber() - Length;
Plot Start = if barnumber()==Strt then MovAvgP else double.NaN;
Start.SetPaintingStrategy(paintingStrategy = PaintingStrategy.TRIANGLES);

The above code doesn't work but once i change the strt to a number "Constant" instead of a mathmatical operation it works. Can anyone explain why this happens and what is the work around please?

the formula 'doesn't work' , because it is never true

rewrite this , to see why
Strt = BarNumber() - Length;
Plot Start = if barnumber()==Strt then...

to this,
Plot Start =
if barnumber() == ( BarNumber() - Length) then...

a variable will never be equal to itself + a number.
if you used an offset, it might work,

what are you trying to do?
movavgp isn't defined.

 

[EightySix]

the formula 'doesn't work' , because it is never true

rewrite this , to see why
Strt = BarNumber() - Length;
Plot Start = if barnumber()==Strt then...

to this,
Plot Start =
if barnumber() == ( BarNumber() - Length) then...

a variable will never be equal to itself + a number.
if you used an offset, it might work,

what are you trying to do?
movavgp isn't defined.

What you have suggested is my original code and didn't work. The plot show if Barnumber()==Barnumber()-Length so it basically says show the plot back when the barnumber() equals to barnumber today minus the length.

The MovAvgP is already defined and working but i have posted it to focus on the issue.

 

[halcyonguy]

What you have suggested is my original code and didn't work. The plot show if Barnumber()==Barnumber()-Length so it basically says show the plot back when the barnumber() equals to barnumber today minus the length.

The MovAvgP is already defined and working but i have posted it to focus on the issue.

read my post again.
i wasn't suggesting a fix.
i was explaining why the original code doesn't work.

write a sentence that describes when you want movavgp to plot.

 

[EightySix]

read my post again.
i wasn't suggesting a fix.
i was explaining why the original code doesn't work.

write a sentence that describes when you want movavgp to plot.

The moving average is already plotted. The start plot is to put a triangle at moving average line based on the length of the moving average. Hope it is clear...

The code in full



input Length = 20;
def MovAvgD = MovingAverage(length = Length, data = close);
Plot MovAvgP = MovAvgD;
def Strt = BarNumber() - Length;
Plot Start = if barnumber()==Strt then MovAvgP else double.NaN;
Start.SetPaintingStrategy(paintingStrategy = PaintingStrategy.TRIANGLES);