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Jim & Lana/
Why do you want a standard deviation? Your quote doesn't ask for it.
If you really do want standard deviations take a look at Bollinger
Bands. The quote is not clear as to what the centre line is based on,
but assuming that too refers to a daily range, the following MS v.6.5
code should cover it.
Mov(H-L,20,S);
Mov(H-L,20,S)+Mov(H-L,20,S)*2.5;
Mov(H-L,20,S)-Mov(H-L,20,S)*2.5
If you want the plotted centre line based on (H+L+C)/3 you can
substitute Mov(Typical(),20,S) in each line. If you don't want all
lines in the same colour and style you can enter each line as a separate
indicator, omitting the semi-colons at the end of lines 1 and 2. Looks
as if your formula #2 contains a typo: (H+L) should read (H-L); perhaps
that was your problem..
Harvey Pearce, Victoria, B.C., Canada
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Jim & Lana wrote:
>
> I have found an indicator that Linda Rashke uses. It is based on a
> Keltner Band, "I put Keltner channels set at 2.5 times the 20-day moving
> average daily range, centered around the 20-period moving average."
>
> I have been struggling with this, I assume, simple formula, and find I
> am doing something wrong, the bands are to wide or look so very narrow.
> Keltner Bands use a 10 day moving average so I have substituted "20" for
> the "10". Here is a Keltner Band formula from Equis, could someone
> please help me get a 2.5 standard deviation on this thing. I would
> really appreciate it....Lana..
>
> Formula #1:
>
> Name :20 Day Moving Average
> Formula: MOV((H+L+C)/3,20,Simple)
>
> Formula #2:
> Name: Upper Keltner Band
> Formula: MOV((H+L+C)/3,20,S)+MOV((H+L),20,S)
>
> Formula #3:
> Name: Lower Keltner Band
> Formula: MOV((H+L+C)/3,20,S)-MOV((H-L),20,S)
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