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Chris,
Try this formula:
//Percent envelopes
pds =Param("periods", 20,10,40,1);
percent=Param("Percent",95,10,100,5);
Value2=Sum(HHV(H,pds),pds)/pds;
Value3=Sum(LLV(L,pds),pds)/pds;
range=Value2 - Value3;
shift = range * (PerCent / 100);
avg1=Sum(EMA(C,pds),pds)/pds;
avg2=avg1+shift;
avg3=avg1-shift;
topband=avg2;
midline=avg1;
botband=avg3;
Plot(C,"Close",colorBlack,styleCandle);
Plot(topband,"tobBand",colorRed,styleLine);
Plot(midline,"Midline",colorYellow,styleLine);
Plot(botband,"BotBand",colorRed,styleLine);
Title=Name()+"...Percent of enclosure = "+WriteVal(percent,1)+" % based on
"+"[ "+WriteVal(pds,1)+" ]"+" Periods"+"\n"+"Topband =
"+WriteVal(topband,format=1.2)+"\n"+"Midline = "
+WriteVal(midline,format=1.2)+"\n"+"BotBand = "
+WriteVal(botband,format=1.2)+"\n"+"Todays Close = "
+WriteVal(C,format=1.2);
Anthony
----- Original Message -----
From: "indiana0352" <cs_winn@xxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Friday, September 19, 2003 4:54 PM
Subject: [amibroker] Re: 95% Channel formula
> The lines are not straight and therefore are not parallel. They
> move up and down every day and will in fact look exactly like the MA
> because thats what they're based on.
>
> I have the formula in Amibroker already and the channels it creates
> look quite nice and work well in both uptrends and downtrends. It's
> just that I have to adjust the coefficient manually and eyeball what
> looks like 95% of prices.
>
> I'm sure there is a way of mathematically calculating this formula...
>
> Chris
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "sloughbridge" <sloughbridge@xxxx>
> wrote:
> > --- In amibroker@xxxxxxxxxxxxxxx, "indiana0352" <cs_winn@xxxx>
> wrote:
> >
> > > Thanks for the info. I'm not using Boll Bands simply because
> Elder
> > > says they're not based on volatility as BBands are. Elder feels
> > > that channels are more appropriate for stock trading because
> they
> > > give former price targets when channel trading.
> > >
> > > This seems reasonable to me but I wanted to see for myself.
> >
> > I believe if there were a formula to plot an MA and 2 equidistant
> > parallel bands, within which would fall 95% of prices, he would
> have
> > provided it.
> >
> > You know what price trends look like, and how volatility ebbs and
> > flows as that trend develops. Can you imagine parallel lines
> > surrounding a single MA containing a fixed percentage of the price
> > action?
>
>
>
> Send BUG REPORTS to bugs@xxxxxxxxxxxxx
> Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
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>
>
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