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Looks pretty good - although I converted it to a line from histogram
(personal preference!).
thanks!
--- In amibroker@xxxxxxxxxxxxxxx, "tradingarthur" <tradingarthur@xxx>
wrote:
>
> Hi,
>
> I have taken the formula from below and put into regular BB
> indicator. How does this look?
>
> P = ParamField("Price field",-1);
> Periods = Param("Periods", 15, 2, 100, 1 );
> Width = Param("Width", 2, 0, 10, 0.05 );
> Color = ParamColor("Color", colorCycle );
> Style = ParamStyle("Style");
> lowerBB = BBandBot( P, Periods, Width );
> upperBB = BBandTop( P, Periods, Width );
> PercentBB = (C- lowerBB) / (upperBB - lowerBB);
> PercentBB_norm = (PercentBB - 0.5) * 2.0;
> Plot( PercentBB_norm * 2 , "%BBnorm" + _PARAM_VALUES(), IIf
> (PercentBB_norm*2>0,colorGreen, colorRed), styleHistogram );
> Plot(2,"2 Standard Deviations above average",colorGreen,styleLine);
> Plot(-2,"-2 SD",colorRed, styleLine);
>
>
> Arthur
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "brian_z111" <brian_z111@> wrote:
> >
> > Hello John,
> >
> > Thanks for that.
> >
> > Simple but effective.
> > If you don't mind me saying, I think I prefer %b to BB themselves.
> >
> > I see you include the equation in your tutorial section.
> >
> > http://www.bollingerbands.com/services/bb/?page=5
> >
> >
> > Any tips on how to trade %b?
> >
> > BB (also known as brian_z)
> >
> >
> >
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "bbands" <BBands@> wrote:
> > >
> > > --- In amibroker@xxxxxxxxxxxxxxx, "droskill" <droskill@> wrote:
> > > >
> > > > Hey all - I'm trying to put together an indicator based on
> > Standard
> > > > Deviation. The difference, from, say Bollinger Bands in this
> > case is
> > > > that I want to show the Std Dev from a moving average in terms
> of
> > 1,2
> > > > and 3 standard deviations from mean, where mean is an N day
> moving
> > > > average. So, the mean would be represented by a constant
> straight
> > > > line on a chart, and then a line would go up/down around it.
> > > >
> > > > For an example, check this out:
> > > >
> > > http://www.indexindicators.com/charts/sp500-vs-sp500-50d-rsma-
> > params-3y-x-x/
> > > >
> > > > I really don't know how to approach this - anybody have any
> > > > thoughts/ideas? Or maybe someone has done it before (or it's
> in
> > AB
> > > > already) and I just haven't found it.
> > > >
> > > > Thanks!
> > >
> > > I think %b is what you want.
> > >
> > > %b = (last - lowerBB) / (upperBB - lowerBB)
> > >
> > > (%b is derived from the formula for Stochastics.)
> > >
> > > Using the standard BB parameters of +/- 2 sd:
> > >
> > > +2, %b = 1.0
> > > +1, %b = 0.75
> > > 0, %b = 0.5
> > > -1, %b = 0.25
> > > -2, %b = 0.0
> > >
> > > If you need centered numbers you can subtract 0.5 from %b and
> > multiply
> > > the result by two, or whatever constant suits your ap. Again
> using
> > the
> > > defaults of +/- 2 sd:
> > >
> > > %b_norm = (%b - 0.5) * 2.0
> > >
> > > Which would give:
> > >
> > > +2, %b = 1.0
> > > +1, %b = 0.5
> > > 0, %b = 0.0
> > > -1, %b = -0.5
> > > -2, %b = -1.0
> > >
> > > Or, again sing the default parms od +/1 2 sd, multiplying by 4
> would
> > > give you the intuitive number you seek:
> > >
> > > +2, %b = 2.0
> > > +1, %b = 1.0
> > > 0, %b = 0.0
> > > -1, %b = -1.0
> > > -2, %b = -2.0
> > >
> > > Enjoy,
> > >
> > > jab
> > > www.bbands.com
> > >
> >
>
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