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Moving Averages

  1. #1
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    Moving Averages

    Hi,

    I am trying to create a formula that will dynamically calculate a short-run and long-run moving average. The number of periods for each moving average can change depending on what is typed into cell C2 and cell C3.

    For example, if $C$2=2, then the SRMA in cell E8 would be the average for Periods 1-2, or 594,443 (average of cells D7:D8). If $C$2=3, then cell E8 would be empty and cell E9 would be 602,394.

    Thanks so much!
    John
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    Last edited by John Bates; 06-21-2010 at 04:31 PM. Reason: Solved

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    Re: Moving Averages

    Try:

    =IF($C7=$C$2,AVERAGEIF($C$7:$C$47,"<="&$C$2,$D$7:$D$47),"")

    and

    =IF($C7=$C$3,AVERAGEIF($C$7:$C$47,"<="&$C$3,$D$7:$D$47),"")

    copied down.
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    Re: Moving Averages

    Hi NBVC,

    Thanks for the help. This isn't quite there yet. When i drag the formula down, I only get the average in cell E8 instead of a moving average. For example,
    E9 = 2 period moving average of cells D8:D9
    E10 = 2 period moving average of cells D9:D10
    E11 = 2 period moving average of cells D10:D11
    etc.

    Does that help? Thanks again!!

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    Re: Moving Averages

    What do you think about this formula that i just created?

    =IFERROR(AVERAGE(OFFSET(D7,(-$C$2+1),0,$C$2,1)),"")
    copied down E

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    Re: Moving Averages

    I misunderstood...

    Try:

    Please Login or Register  to view this content.

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    Re: Moving Averages

    Quote Originally Posted by John Bates View Post
    What do you think about this formula that i just created?

    =IFERROR(AVERAGE(OFFSET(D7,(-$C$2+1),0,$C$2,1)),"")
    copied down E
    I suppose you could use:

    =IF(C7<$C$2,"",AVERAGE(OFFSET(D7,(-$C$2+1),0,$C$2,1)))

    in order to get blanks until the first useful cell...

    but, although shorter, the OFFSET function is volatile....

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    Re: Moving Averages

    I don't know what's wrong with me... ignore my last stupid formulas...

    try, non-volatile:

    Please Login or Register  to view this content.
    copied down.

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    Re: Moving Averages

    Perfect, thanks!! Yeah, I was just trying to figure out what was going on with the formula; thanks for sending the update!

    BTW, why is OFFSET volatile? Is it because it can run into issues if you OFFSET back into a cell that doesn't exist (e.g., OFFSET up 3 cells from A2)?

    Thanks,
    John

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    Re: Moving Averages

    This article explains the volatile functions and why they are volatile.

    http://www.decisionmodels.com/calcsecretsi.htm

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    Re: Moving Averages

    Awesome, thanks again!

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