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to Keith's original question, why wouldn't you just say:
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>bbandtop( close, 10, S, 2 )
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>and
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial color=#0000ff
size=2>bbandbot( close, 10, S, 2)
<BLOCKQUOTE
>
<FONT face="Times New Roman"
size=2>-----Original Message-----From: Chuck Rademacher
[mailto:chuck_rademacher@xxxxxxxxxx]Sent: Sunday, April 06, 2003
12:39 AMTo: equismetastock@xxxxxxxxxxxxxxxSubject: RE:
[EquisMetaStock Group] Re: Bollinger Bands
Am I
missing something here? Why would you simply say:
<FONT face=Arial color=#0000ff
size=2>
<FONT face=Arial
color=#0000ff size=2>Stdev(Close,10);
<BLOCKQUOTE
>
<FONT face="Times New Roman"
size=2>-----Original Message-----From: Roy Larsen
[mailto:rlarsen@xxxxxxxxxxxxxx]Sent: Sunday, April 06, 2003 12:32
AMTo: equismetastock@xxxxxxxxxxxxxxxSubject: Re:
[EquisMetaStock Group] Re: Bollinger
BandsKeithHere's a formula for a 10 period
Standard Deviation. It's not perfect butit's the best I can come up with
for the moment. You'll need to adapt foryour own needs.
{Standard Deviation 10
periods}M:=Mov(C,10,S);X:=Power(M-C,2)+Power(M-Ref(C,-1),2)+Power(M-Ref(C,-2),2)+Power(M-Ref(C,-3),2)+Power(M-Ref(C,-4),2)+Power(M-Ref(C,-5),2)+Power(M-Ref(C,-6),2)+Power(M-Ref(C,-7),2)+Power(M-Ref(C,-8),2)+Power(M-Ref(C,-9),2);Y:=Sqrt(X/10);
Y;Roy----- Original Message -----From: "keith"
<janus36@xxxxxxxxxx>To:
<equismetastock@xxxxxxxxxxxxxxx>Sent: Saturday, April 05, 2003
7:14 PMSubject: [EquisMetaStock Group] Re: Bollinger
Bandscould some learned member explain to me how to calculate
the Stdev ofBollinger Bands please.from memory, i think 2 stdev is
about 96% and 3 stdev is about 98-99% of therange of the set
parameter. does anyone know the formula to calculate it
?thanks keithTo
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