What Is The Proper Use of barNumber()?

joseraul

New member
Hi!

I'm trying to build a vwap that can ignore the first bars "under demand".
This is what I have so far:

Code:
input ignoreBars = 5;

def sinceBar = barNumber() - ignoreBars;
def priceVolume = close * volume;
def cumulativePriceVolume = sum(priceVolume, sinceBar);
def cumulativeVolume = sum(volume, sinceBar);
def vwapValue = cumulativePriceVolume / cumulativeVolume;

plot vwapPlot = vwapValue;

Apparently, "sum" doesn't like the dynamic "sinceBar" and it fails with "Only constants expected here"

Does anyone have an idea of how to fix this? Or maybe a better approach?
Thanks in advance!

PS: I'm pretty new on Thinkscript world, so I don't know if what I'm asking is very obvious :)
 

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Hi, I’m not a coder so sorry if I’m asking a dumb question. I am trying to get the number of bars for today only to pop up on a label but my script currently has “barnumber()” and if I have a 3 day 15 min time frame it will all the bars in the last 3 days. Is there any way to show just today’s barnumbers w/0 premarket? Need this number for a formula. Thanks for any help.
 
Hi, I’m not a coder so sorry if I’m asking a dumb question. I am trying to get the number of bars for today only to pop up on a label but my script currently has “barnumber()” and if I have a 3 day 15 min time frame it will all the bars in the last 3 days. Is there any way to show just today’s barnumbers w/0 premarket? Need this number for a formula. Thanks for any help.

this will show 2 labels. one of them will have the quantity of bars in a normal trading day.

Code:
def bn = barnumber();
def price = close;
input chart_stat_labels = yes;

# 390min in a day
def chartagg = GetAggregationPeriod();
def chartmin = (chartagg / 1000) / 60;
AddLabel(chart_stat_labels, "chartmin " + chartmin, Color.MAGENTA);

def daybarqty = roundup(390 / chartmin, 0);
AddLabel(chart_stat_labels, "bars per day " + daybarqty, Color.MAGENTA);
 
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this will show 2 labels. one of them will have the quantity of bars in a normal trading day.

Code:
def bn = barnumber();
def price = close;
input chart_stat_labels = yes;

# 390min in a day
def chartagg = GetAggregationPeriod();
def chartmin = (chartagg / 1000) / 60;
AddLabel(chart_stat_labels, "chartmin " + chartmin, Color.MAGENTA);

def daybarqty = roundup(390 / chartmin, 0);
AddLabel(chart_stat_labels, "bars per day " + daybarqty, Color.MAGENTA);

Thank you! It worked! Is there any way to get the barnumber live as the trading day progresses? For example, instead of showing the set number of bars in a day for a specific time frame it will show ( on a 5 min ) bars for day = 1 from 6:30 to 6:35, then from 6:35 to 6:40 it would show bars for day = 2, then from 6:40 to 6:45 it would show bars for day = 3 etc...
 
Last edited:
Thank you! It worked! Is there any way to get the barnumber live as the trading day progresses? For example, instead of showing the set number of bars in a day for a specific time frame it will show ( on a 5 min ) bars for day = 1 from 6:30 to 6:35, then from 6:35 to 6:40 it would show bars for day = 2, then from 6:40 to 6:45 it would show bars for day = 3 etc...
Sorry I didnt explain as well in the first msg.
 
Thank you! It worked! Is there any way to get the barnumber live as the trading day progresses? For example, instead of showing the set number of bars in a day for a specific time frame it will show ( on a 5 min ) bars for day = 1 from 6:30 to 6:35, then from 6:35 to 6:40 it would show bars for day = 2, then from 6:40 to 6:45 it would show bars for day = 3 etc...

this will,
..calculate the quantity of bars/day, for any time less than DAY.
..show a label , with the current bar# of the day
..show bubbles under the candles, with current bar# ( can turn off with an input variable)

Ruby:
# chart_time_stats2

def bn = barnumber();
def istoday = if GetLastDay() == GetDay() then 1 else 0;
def price = close;
input chart_stat_labels = yes;

# 390min in a day
def chartagg = GetAggregationPeriod();
def chartmin = (chartagg / 1000) / 60;
AddLabel(chart_stat_labels, "chartmin " + chartmin, Color.MAGENTA);

def minz;
if chartmin == 60 then {
 minz = 420;
} else if chartmin == 120 then {
 minz = 480;
} else if chartmin == 240 then {
 minz = 480;
} else {
minz = 390;
}

def daybarqty = roundup(minz / chartmin, 0);
AddLabel(chart_stat_labels, "bars per day " + daybarqty, Color.MAGENTA);

input start = 0930;
def mins = (secondsfromTime(start)/60);

def current_bar = ((mins/minz) * daybarqty) + 1;

addlabel(1, "bar # " + current_bar + " / " + daybarqty, color.cyan);

input test1_barcnt = yes;
addchartbubble(test1_barcnt, low,
 current_bar  + "\n" +
 daybarqty
, color.cyan, no);

input test2 = no;
addchartbubble(test2, low,
 mins + "\n" +
# (mins/390)  + "\n" +
 (mins/minz)  + "\n" +
 current_bar  + "\n" +
 daybarqty
, color.cyan, no);
#
 
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