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I haven't checked the accuracy you can try this: Avgvol=0; sd = 0;
if (Interval()<inDaily) {
n = round(3600*6.75/Interval()); //number of bars in the day
d = Param("Lookback days",5,1,30,1); //averaging period
barnum = BarsSince(Day()!=Ref(Day(),-1)); //bar number from start of the day
for (i=0; i<n; i++) {
VarSet("vol"+i,IIf(i==barnum,V,0));
}
for (i=0; i<n; i++)
{
Avgvol=IIf(barnum==i,Sum(VarGet("vol"+i),n*d)/d,Avgvol); sd = IIf( barnum==i, StDev( VarGet( "vol"+i), n*d), sd);
}
Plot( Avgvol, "Average Volume:" + d + " days", colorWhite, styleLine );
Plot( Avgvol+sd, "1 std dev:", colorBrown, styleLine);
}
On Fri, May 1, 2009 at 11:17 AM, gucytribe <angus@xxxxxxxxxxxxx> wrote:
Hi,
I downloaded this code from the Amibroker AFL library which calculates the intraday average volume. I have been trying to calculate the standard deviation of volume for the same time of day, however after messing around with it for quite some time I still haven't managed to code anything that gives the correct answer.
Can someone please help?
Many thanks.
Avgvol=0;
if (Interval()<inDaily) {
n = round(3600*6.75/Interval()); //number of bars in the day
d = Param("Lookback days",5,1,30,1); //averaging period
barnum = BarsSince(Day()!=Ref(Day(),-1)); //bar number from start of the day
for (i=0; i<n; i++) {
VarSet("vol"+i,IIf(i==barnum,V,0));
}
for (i=0; i<n; i++) {
Avgvol=IIf(barnum==i,Sum(VarGet("vol"+i),n*d)/d,Avgvol);
}
}
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