cant use var in sum() :(

[tatl]

i need to count bars until a certain condition is met, and then addLabel a sum of the counted bars the next bar after.

there is no telling what the final count will be, it depends on the condition.

but i've learned that sum's length input only accepts constants i cant feed it a var based on the count.

is there anything to be done?

 

[halcyonguy]

i need to count bars until a certain condition is met, and then addLabel a sum of the counted bars the next bar after.

there is no telling what the final count will be, it depends on the condition.

but i've learned that sum's length input only accepts constants i cant feed it a var based on the count.

is there anything to be done?

instead of fixating on a function, to fix a problem that isn't defined,

list out the conditions that the study should follow.
be as precise and short as possible.

what happens to Start counting bars?
What happens to stop counting bars?

maybe saving start and stop barnumbers, then subtracting them, could give the quantity of bars between start and stop?

partial code...
def startbn = if start then barnumber() else startbn[1];
def bars = if stop then barnumber() - startbn else bars[1];

 

[tatl]

instead of fixating on a function, to fix a problem that isn't defined,

list out the conditions that the study should follow.
be as precise and short as possible.

what happens to Start counting bars?
What happens to stop counting bars?

maybe saving start and stop barnumbers, then subtracting them, could give the quantity of bars between start and stop?

partial code...
def startbn = if start then barnumber() else startbn[1];
def bars = if stop then barnumber() - startbn else bars[1];

thx for reply.

so

it's a indicator for the 1-tick chart. on the 1-tick chart, bars are obviously ticks.

if you're trying to synchronize the 1-tick chart with a 311tick chart for example, you can make a recurrent sum (of say, volume) every 311 bars and print that as a bubble.

however, the last 311-tick-cycle of the current trading session session gets truncated at 4pm. it doesn't finish its full cycle. it needs to start back at 1.

so i need the counter to stop at 4pm, count the amount of bars btwn 4pm and the last 311sumprint, and then sum the volumes of each tick to make a truncated volume sum.

i got the counter to stop at 4pm, and find the difference btwn the 4pm barnumber() and the last printed barnumber() ... i just cant plug that truncation value into the sum() length argument since it requires a constant. and the truncation value will always be different depending on the chart etc.

 

[tatl]

@mashume would love your opinion on this since you're the tickmaestro sync god

 

[armybender]

thx for reply.

so

it's a indicator for the 1-tick chart. on the 1-tick chart, bars are obviously ticks.

if you're trying to synchronize the 1-tick chart with a 311tick chart for example, you can make a recurrent sum (of say, volume) every 311 bars and print that as a bubble.

however, the last 311-tick-cycle of the current trading session session gets truncated at 4pm. it doesn't finish its full cycle. it needs to start back at 1.

so i need the counter to stop at 4pm, count the amount of bars btwn 4pm and the last 311sumprint, and then sum the volumes of each tick to make a truncated volume sum.

i got the counter to stop at 4pm, and find the difference btwn the 4pm barnumber() and the last printed barnumber() ... i just cant plug that truncation value into the sum() length argument since it requires a constant. and the truncation value will always be different depending on the chart etc.

Have you tried "BarNumber() % 311 = 0" and SecondsFromTime(1700) >= 0 and SecondsToTime(1700) <= 0"?

Using that (remainder or modulo function --- the "%" sign) will tell you when you have exactly enough bars to be divided by 311 (or whatever number) and you can use seconds from / to time to reset the count. You could use that as the condition to add the bubble. (times are EST for the time functions FYI).

 

[tatl]

Have you tried "BarNumber() % 311 = 0" and SecondsFromTime(1700) >= 0 and SecondsToTime(1700) <= 0"?

Using that (remainder or modulo function --- the "%" sign) will tell you when you have exactly enough bars to be divided by 311 (or whatever number) and you can use seconds from / to time to reset the count. You could use that as the condition to add the bubble. (times are EST for the time functions FYI).

thx for the try. all the counting is taken care of, this part i've already got fine. the problem is that at 4pm, 8pm, 7am, and 9:30am, the counter needs to reset to 1 without completing it's cycle of 311. i have that part fine as well. the only issue is i then need to sum the volume for that truncated amount of ticks. say it's 114. i can't plug 114 into the sum(volume, bars) because "bars" expects a constant. but my "114" changes depending on where the cycle had to get cut off. so it has to be a variable. and sum() won't accept a variable as a "length" input.

 

[mashume]

thx for the try. all the counting is taken care of, this part i've already got fine. the problem is that at 4pm, 8pm, 7am, and 9:30am, the counter needs to reset to 1 without completing it's cycle of 311. i have that part fine as well. the only issue is i then need to sum the volume for that truncated amount of ticks. say it's 114. i can't plug 114 into the sum(volume, bars) because "bars" expects a constant. but my "114" changes depending on where the cycle had to get cut off. so it has to be a variable. and sum() won't accept a variable as a "length" input.

I have a solution for you, but I don't have time to code it up right now. hopefully saturday afternoon or sunday afternoon will be free for something like this.

-mashume

 

[tatl]

I have a solution for you, but I don't have time to code it up right now. hopefully saturday afternoon or sunday afternoon will be free for something like this.

-mashume

! thanks ! please take your time. i'll look forward to it

 

[halcyonguy]

thx for reply.

so

it's a indicator for the 1-tick chart. on the 1-tick chart, bars are obviously ticks.

if you're trying to synchronize the 1-tick chart with a 311tick chart for example, you can make a recurrent sum (of say, volume) every 311 bars and print that as a bubble.

however, the last 311-tick-cycle of the current trading session session gets truncated at 4pm. it doesn't finish its full cycle. it needs to start back at 1.

so i need the counter to stop at 4pm, count the amount of bars btwn 4pm and the last 311sumprint, and then sum the volumes of each tick to make a truncated volume sum.

i got the counter to stop at 4pm, and find the difference btwn the 4pm barnumber() and the last printed barnumber() ... i just cant plug that truncation value into the sum() length argument since it requires a constant. and the truncation value will always be different depending on the chart etc.

sorry, i am not familiar with tick charts.

 

[mashume]

It could look something like this:

declare lower;

def bar = BarNumber();
def first_mark = if secondsFromTime(0930) >= 0 and secondsFromTime(0930)[1] < 0 then 1 else 0;
def second_mark = if secondsFromTime(0700) >= 0 and secondsFromTime(0700)[1] < 0 then 1 else 0;
def third_mark = if secondsFromTime(1600) >= 0 and secondsFromTime(1600)[1] < 0 then 1 else 0;
def fourth_mark = if secondsFromTime(2000) >= 0 and secondsFromTime(2000)[1] < 0 then 1 else 0;
def bar_mark = if bar % 311 == 0 then 1 else 0;

def reset = if first_mark == 1 OR second_mark == 1 or third_mark == 1 or fourth_mark == 1 or bar_mark == 1 then 1 else 0;

def counter = if reset == 1 then 1 else counter[1] + 1;

plot three_eleven_count = counter;

Note what we've done and why: exact times seldom fall on bar boundaries on tick charts. So instead of using an exact time (secondsFromTime(x) == 0) we use a pair of bars to decide whether the time fell between this bar and the last bar. When that condition is met, we make the series == 1 (true) and go on.

We set a "reset" variable to be True (1) whenever one of the _mark variables is True.

Then we reset the counter when the reset tells us to (when it is True)

-mashume

 

[tatl]

It could look something like this:

declare lower;

def bar = BarNumber();
def first_mark = if secondsFromTime(0930) >= 0 and secondsFromTime(0930)[1] < 0 then 1 else 0;
def second_mark = if secondsFromTime(0700) >= 0 and secondsFromTime(0700)[1] < 0 then 1 else 0;
def third_mark = if secondsFromTime(1600) >= 0 and secondsFromTime(1600)[1] < 0 then 1 else 0;
def fourth_mark = if secondsFromTime(2000) >= 0 and secondsFromTime(2000)[1] < 0 then 1 else 0;
def bar_mark = if bar % 311 == 0 then 1 else 0;

def reset = if first_mark == 1 OR second_mark == 1 or third_mark == 1 or fourth_mark == 1 or bar_mark == 1 then 1 else 0;

def counter = if reset == 1 then 1 else counter[1] + 1;

plot three_eleven_count = counter;

Note what we've done and why: exact times seldom fall on bar boundaries on tick charts. So instead of using an exact time (secondsFromTime(x) == 0) we use a pair of bars to decide whether the time fell between this bar and the last bar. When that condition is met, we make the series == 1 (true) and go on.

We set a "reset" variable to be True (1) whenever one of the _mark variables is True.

Then we reset the counter when the reset tells us to (when it is True)

-mashume

yes, indeed. thank you. this part i had though.

here is my problem, i'm not allowed to do this:

def volumeSum = sum(volume, counter);
AddChartBubble(reset, high, volumeSum, Color.YELLOW, no);

can't do this because sum() won't accept counter as a length argument.

i am limited to doing:

def volumeSum = sum(volume, 311);
addChartBubble(reset, high, volumeSum, color.YELLOW, no);

which means that the candles that Dont last 311 ticks, but are Cut Off by 9:30am, 4:am etc, and last for Fewer Ticks, i get the wrong volume sum for the candle.

 

[mashume]

yes, indeed. thank you. this part i had though.

here is my problem, i'm not allowed to do this:

def volumeSum = sum(volume, counter);
AddChartBubble(reset, high, volumeSum, Color.YELLOW, no);

can't do this because sum() won't accept counter as a length argument.

i am limited to doing:

def volumeSum = sum(volume, 311);
addChartBubble(reset, high, volumeSum, color.YELLOW, no);

which means that the candles that Dont last 311 ticks, but are Cut Off by 9:30am, 4:am etc, and last for Fewer Ticks, i get the wrong volume sum for the candle.

Don't use sum()

do your volume sum this way:

def volumeSum = if reset != 1 then volumeSum[1] + VOLUME else 0;

-mashume

 

[tatl]

Don't use sum()

do your volume sum this way:

def volumeSum = if reset != 1 then volumeSum[1] + VOLUME else 0;

-mashume

Noww I get it !! this concept will change everything for me Thank U !