If I have a 5 Minute Time Bar for measuring trade volume within a Stock Symbol (any symbol)

Which is 300 seconds in total (5 x 60 seconds in a minute = 300)

and i divide the 300 seconds into 10 equal segments of time -- 30 seconds each

and i measure the buying volume that took place from trades during EACH of the 10 segments ---

For example:

If each of the 10 segments of 30 seconds had 1000 shares traded then the rate of trade volume consistency of trading per each segment would be exact or the same rate flow of volume

1000 - 1st segment

1000

1000

1000

1000

1000

1000

1000

1000

1000 - 10th segment

But in the real world you get more inconsistent flow something like this... and i would like to understand how to measure the variance here ?

1250 - 1st segment

800

900

1600

550

1700

1250

1350

1100

1500 - 10th segment

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We can measure the variance by using the

I've included the equation and how to find both the

Stats-Answer.PNG

I went ahead and did the Population Variance and S.D. instead of the Sample Variance and sample S.D. here. As you can see, it's a pretty similar answer.

Cheers

PopulationVariance.PNG

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