Infinite Loop

[Human]

I am calculating some values that continue into the future. I don't have any code that ends the loop. It seems to work without any problems. I think I have read in the past that this is not a good practice for some reason. I searched for posts about this but have not found anything addressing this situation. I am sure I can figure out how to stop plotting/calculating infinitely but I want to leave it as it is and not add needless lines of code. Any advice?

 

[halcyonguy]

I am calculating some values that continue into the future. I don't have any code that ends the loop. It seems to work without any problems. I think I have read in the past that this is not a good practice for some reason. I searched for posts about this but have not found anything addressing this situation. I am sure I can figure out how to stop plotting/calculating infinitely but I want to leave it as it is and not add needless lines of code. Any advice?

post the code

use 'while' , in fold loops. remember to use getvalue() as needed.
while something is true, keep looping. ( use a huge number as the to #)


example that uses while
https://usethinkscript.com/threads/...quantities-of-smaller-bars.15055/#post-123021

 

[Human]

post the code

use 'while' , in fold loops. remember to use getvalue() as needed.
while something is true, keep looping. ( use a huge number as the to #)


example that uses while
https://usethinkscript.com/threads/...quantities-of-smaller-bars.15055/#post-123021

Thanks for the quick answer. I will study the code. I am currently using an if then else statement. Should I have a concern about plotting into the future?

 

[halcyonguy]

Thanks for the quick answer. I will study the code. I am currently using an if then else statement. Should I have a concern about plotting into the future?

oh, you said loop, so that implies using fold. which is why i said what i said.

if all you have is an if then, then we will have to see it to get a better idea of what you have.

issue with future plots? what does that mean, after the last bar? that is doable.
there won't be any candles or price data, so you have to configure a variable to hold some price values for things to plot. again, need something more specific before guessing any more.

 

[Human]

oh, you said loop, so that implies using fold. which is why i said what i said.

if all you have is an if then, then we will have to see it to get a better idea of what you have.

issue with future plots? what does that mean, after the last bar? that is doable.
there won't be any candles or price data, so you have to configure a variable to hold some price values for things to plot. again, need something more specific before guessing any more.

Actually, my questions relate to what I learned from you here:

https://usethinkscript.com/threads/expansion-area-ma-lines-bubble.11201/post-97853

I used the method in a few different ways. The code below is just a focused example and the plot is to show what it is doing. It is for diagnostic purposes only. Here is the little example:

# get price from last bar, and keep
def lastclose = if barnumber() == 1 then 0 else if lastbar then close else lastclose[1];
plot LastClosePlot = LastClose;

My question is about the plot going into the future. It does not stop. I understand that the fold function should not keep looping, but does this self-referencing code cause problems in some way?

 

[halcyonguy]

Actually, my questions relate to what I learned from you here:

https://usethinkscript.com/threads/expansion-area-ma-lines-bubble.11201/post-97853

I used the method in a few different ways. The code below is just a focused example and the plot is to show what it is doing. It is for diagnostic purposes only. Here is the little example:

# get price from last bar, and keep
def lastclose = if barnumber() == 1 then 0 else if lastbar then close else lastclose[1];
plot LastClosePlot = LastClose;

My question is about the plot going into the future. It does not stop. I understand that the fold function should not keep looping, but does this self-referencing code cause problems in some way?

fold has no bearing on this and just adds confusion. there is no fold code example, so to say 'it should stop looping' makes no sense and can't be answered.
a basic fold loop iterates through a set number of loops.
a fold loop can use 'while' to stop the looping before it reaches the 'to' number.

problems? no. it is just another way to draw a line.
reading from a previous bar is common.
plotting after the last candle is fine.
after the last candle, there are placeholders (what i call them) for future bars, that have valid bar numbers, all the way to the right edge of the chart.

here is a test code to show the bar numbers. (untested , TOS is down)
( fixed addchart spelling)

def bn = barnumber();
def lastbn = HighestAll(If(IsNaN(close), 0, bn));
def lastbar = if (bn == lastbn) then 1 else 0;
def lastclose = if barnumber() == 1 then close else if lastbar then close else lastclose[1];

addchartbubble(1, lastclose,
bn + "\n" +
lastclose
, color.yellow, no);

 

[Human]

fold has no bearing on this and just adds confusion. there is no fold code example, so to say 'it should stop looping' makes no sense and can't be answered.
a basic fold loop iterates through a set number of loops.
a fold loop can use 'while' to stop the looping before it reaches the 'to' number.

problems? no. it is just another way to draw a line.
reading from a previous bar is common.
plotting after the last candle is fine.
after the last candle, there are placeholders (what i call them) for future bars, that have valid bar numbers, all the way to the right edge of the chart.

here is a test code to show the bar numbers. (untested , TOS is down)

def bn = barnumber();
def lastbn = HighestAll(If(IsNaN(close), 0, bn));
def lastbar = if (bn == lastbn) then 1 else 0;
def lastclose = if barnumber() == 1 then close else if lastbar then close else lastclose[1];

addcahrtbubble(1, lastclose,
bn + "\n" +
lastclose
, color.yellow, no);

TOS is running now. The code illustrates your point. I changed one small thing to make it work. Here is the corrected code.

def bn = barnumber();
def lastbn = HighestAll(If(IsNaN(close), 0, bn));
def lastbar = if (bn == lastbn) then 1 else 0;
def lastclose = if barnumber() == 1 then close else if lastbar then close else lastclose[1];

addchartbubble(1, lastclose,
bn + "\n" +
lastclose
, color.yellow, no);