invalidate statement plot 4.1

[lee-I-O=coke-A]

don't understand, can't see the forest from the trees. can some kindly help me.thanks.

def total = 7;

def items = 0;



plot scan = if items < total

then



add 1 to items



else



double.nan;

 

[halcyonguy]

don't understand, can't see the forest from the trees. can some kindly help me.thanks.

def total = 7;
def items = 0;
plot scan = if items < total
then add 1 to items
else double.nan;

can you describe in words, what you want to have happen?


...plot scan = if items < total

this compares 2 constants, 0 and 7.
it will always be true.
line #4 will always be processed, but is incorrect.


...then add 1 to items

this if-then section will always be processed. but it is invalid , so the program crashes.
'add' isn't a valid arithmetic opeator.
you can't add a number to a constant.

---------

i have a feeling you want to add 1 to a variable when something happens. to do this you need to read from a variable in the past. you do this by using an offset.

https://tlc.thinkorswim.com/center/reference/thinkScript/Operators/Arithmetic

 

[lee-I-O=coke-A]

thank you halcyonguy for trying to help me. My goal is to look only at the last 6 bars for a scan, not the entire chart.

 

[halcyonguy]

thank you halcyonguy for trying to help me. My goal is to look only at the last 6 bars for a scan, not the entire chart.

still haven't mentioned what you are looking for, so i will make some guesses.

def trigger =  a true/false  formula 
input barback = 6;
plot trigsum = if sum(trigger, barback) > 0 then 1 else 0;

 

[lee-I-O=coke-A]

halcyonguy, I think we are on right track, but trigger invalid statement. thank you

 

[halcyonguy]

halcyonguy, I think we are on right track, but trigger invalid statement. thank you

i know the trigger formula is invalid.
you haven't explained the conditions to look for.
that's why i wrote out
= a true/false formula
meaning, you can substitute your formula in place of those words.