Plot an arrow a variable number of bars to the right

[Howser]

Hi,
Thanks for any help.....
I would like to plot an arrow afer a condition has been met on any bars that meet this condition.

I can easily tweak either of the following pieces of code to plot an arrow a fixed number of bars to the right or left (Thanks for this code from the forum).

input numberOfBarsAgo = 20;
plot arrow = isNaN(close[-1 - numberOfBarsAgo]) and !isNaN(close[-numberOfBarsAgo]);
arrow.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_DOWN);
arrow.SetDefaultColor(Color.YELLOW);

def x = if isNaN(close[-1]) and !isNaN(close) then barnumber() - 20 else x[1];
plot data = if barNumber() == x[-20] then high else double.nan;
data.SetPaintingStrategy(PaintingStrategy.Arrow_DOWN);

Is there a way to do it for a variable number of bars offset. (The above code complains if I put a variable in the square brackets as the plot function requires a constant)
Any ideas very welcome please.
Thanks a lot
Doug

 

[halcyonguy]

Hi,
Thanks for any help.....
I would like to plot an arrow afer a condition has been met on any bars that meet this condition.

I can easily tweak either of the following pieces of code to plot an arrow a fixed number of bars to the right or left (Thanks for this code from the forum).

input numberOfBarsAgo = 20;
plot arrow = isNaN(close[-1 - numberOfBarsAgo]) and !isNaN(close[-numberOfBarsAgo]);
arrow.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_DOWN);
arrow.SetDefaultColor(Color.YELLOW);

def x = if isNaN(close[-1]) and !isNaN(close) then barnumber() - 20 else x[1];
plot data = if barNumber() == x[-20] then high else double.nan;
data.SetPaintingStrategy(PaintingStrategy.Arrow_DOWN);

Is there a way to do it for a variable number of bars offset. (The above code complains if I put a variable in the square brackets as the plot function requires a constant)
Any ideas very welcome please.
Thanks a lot
Doug

what are you really trying to do?
what is the full code?
might be able to use a fold loop to look back x bars for the signal.

 

[Howser]

what are you really trying to do?
what is the full code?
might be able to use a fold loop to look back x bars for the signal.

Hi Halcyonguy
How strange. That’s exactly the conclusion I came to last night after 2 weeks of trying! I am going to set the bar number of where I want the arrow to be plotted in a variable called mytargetbarnumber and then at each bar in the future I will do a fold loop looking back to see if mytargetbarnumber appears. If it does then I will plot my arrow.
Just need to handle the fold looking back into thin air at the earlier part of the chart.
I’ll let you know how I get on.
Thanks so much.

 

[halcyonguy]

Hi Halcyonguy
How strange. That’s exactly the conclusion I came to last night after 2 weeks of trying! I am going to set the bar number of where I want the arrow to be plotted in a variable called mytargetbarnumber and then at each bar in the future I will do a fold loop looking back to see if mytargetbarnumber appears. If it does then I will plot my arrow.
Just need to handle the fold looking back into thin air at the earlier part of the chart.
I’ll let you know how I get on.
Thanks so much.

you didn't answer any of my questions .
i still have no idea what you are trying to do.


i don't see any errors.
they were both plotting, but one was plotting on top of the other.
i changed one to be an up arrow so you can tell if both plots are working.

# test3_offset
input numberOfBarsAgo = 20;
plot arrow = isNaN(close[-1 - numberOfBarsAgo]) and !isNaN(close[-numberOfBarsAgo]);
arrow.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_DOWN);
arrow.SetDefaultColor(Color.YELLOW);

def x = if isNaN(close[-1]) and !isNaN(close) then barnumber() - 20 else x[1];
plot data = if barNumber() == x[-20] then low else double.nan;
data.SetPaintingStrategy(PaintingStrategy.Arrow_up);
#