# Compare volumes of today and yesterday between open and current times

#### GaiSensei

##### New member
Hi all,

I'm looking to create a formula that compares today's volume to yesterday's volume, between 9am and the current time for each day.

Formula should be something like "Yesterday's Volume (between 9am and Current Time) - 24 hours, divided by Today's volume (between 9am and current time)". Output would simply be a percentage, in a box/label, stating how today's volume compares to yesterday's volume, at this same time.

Cannot find a single thing online about a study like this so here I am trying to make it myself! Thanks for any help.

Solution
Hi all,

I'm looking to create a formula that compares today's volume to yesterday's volume, between 9am and the current time for each day.

Formula should be something like "Yesterday's Volume (between 9am and Current Time) - 24 hours, divided by Today's volume (between 9am and current time)". Output would simply be a percentage, in a box/label, stating how today's volume compares to yesterday's volume, at this same time.

Cannot find a single thing online about a study like this so here I am trying to make it myself! Thanks for any help.

Here is some code by Mobius that you might find helpful. It does not appear to work on timeframes outside normal trading hours as the aftermarket activity is sporadic. If you want the 9am...
Hi all,

I'm looking to create a formula that compares today's volume to yesterday's volume, between 9am and the current time for each day.

Formula should be something like "Yesterday's Volume (between 9am and Current Time) - 24 hours, divided by Today's volume (between 9am and current time)". Output would simply be a percentage, in a box/label, stating how today's volume compares to yesterday's volume, at this same time.

Cannot find a single thing online about a study like this so here I am trying to make it myself! Thanks for any help.

Here is some code by Mobius that you might find helpful. It does not appear to work on timeframes outside normal trading hours as the aftermarket activity is sporadic. If you want the 9am begin time, probably best used for 1hr timeframe charts.

It appears that the prior day matching period only plots after the close of the associated current timeframe bar, which appears to actively accumulate during the bar.

This study will load in the volume panel. If you do not have show volume subgraph checked, the label will not show, unless you move the indicator to one of the other chart panes.

Ruby:
``````# Comparison of Today's Volume at bar and Volume at time.
# Mobius
# V01.11.02.2017
input begin = 0930;
input end   = 1600;
def v = volume;
def bar = barNumber();
def xBar = if secondstilltime(begin)[1]>0 and secondsTillTime(begin) == 0
then bar
else xBar[1];
def pxBar = if xBar != xBar[1]
then xBar[1]
else pxBar[1];
def zxBar = if SecondsFromTime(begin) >= 0 and
SecondsTillTime(end) > 1
then 0
else if SecondsTillTime(end) == 0
then bar
else zxBar[1];
def pzxBar = if zxBar != zxBar[1]
then zxBar[1]
else pzxBar[1];
def pxBars = if bar == xBar
then pxBar
else if bar >= xBar
then pxBars[1] + 1
else pxBars[1];
def length = bar - (pxBars-1);
def RelVol = if bar >= xBar
then getValue(v, length)
else 0;
def pVol = if bar == xBar
then 0
else if bar > xBar
then pVol[1] + RelVol
else pVol[1];
def tVol = if SecondsTillTime(begin) == 0
then v
else if SecondsFromTime(begin) > 0  and SecondsTillTime(end) >= 0
then compoundValue(1, tVol[1] + v, v)
else tVol[1];
addlabel(1, "yesterdays volume at bar = " + RelVol +
"  yesterdays volume = " + pVol +
"  todays volume = " + tVol,
if tVol > pVol
then color.green
else color.red);
# End Code Previous Days Volume Comparison``````

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