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Indeed, Harvey. I tried calculating something like
STDEV(MA(C,100)/Ref(MA(C,100),-100),100) and adding it to MA(C,100) [the
'trend'], but got hopelessly confused. Hence my original question.
Can anyone help?
Steve
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
HarveyHP
To: <A title=amibroker@xxxxxxxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Wednesday, February 11, 2004 8:37
PM
Subject: Re: [amibroker] Re: Sigma
Bands
Read the text in the reference you quoted: "The three lines
above and below this trendline are the 1, 2 and 3 standard deviations of the
percent change of the actual data from the trendline." This is
different from Bollinger Bands.HHP================At 11:47
AM 11/02/2004, you wrote:
Bill,You may well be
right, but the curves don't look anything like BB curves.Are you
suggesting something different which I don't
understand?Steve----- Original Message ----- From:
"billbarack" <wbarack@xxxxxxxxxxx>To:
<amibroker@xxxxxxxxxxxxxxx>Sent: Wednesday, February 11, 2004 3:43
PMSubject: [amibroker] Re: Sigma Bands> Steve,>
The sigma bands are nothing but standard deviations above and below>
the price action. One way to do this is with bollinger bands. Try>
this: Make a custom indicator with price and 3 BBandTop functions at>
1, 2 and 3 standard deviations. Then do the same with the BBandBot>
AFL function. I think you will find this to be what you
want.>> Ask if you run into any difficulties.>>
Bill>>>>> --- In
amibroker@xxxxxxxxxxxxxxx, "Steve Almond" <steve2@xxxx> wrote:>
> Has anyone managed to write the AFL code for Sigma bands? It
seemed> simple, but was beyond me...> > Here is a
reference: <A
href="">http://www.forextrm.com/faq.htm
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