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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 PM
Subject: [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:
http://www.forextrm.com/faq.htm
and a picture:
>
>
>
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