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hi brian.
ive been testing it in the backtester and it gets some great results
for the short time its in the market.
i noticed when theirs a major downtrend that the price is closer to
the top of the bband top so checking the results when used with other
indies. may need to create another variable so that when the band
narrows on an uptrend it plots on the chart.
cheers: john.
--- In amibroker@xxxx, "Brian Elijah" <cadvantag@xxxx> wrote:
> Hi John,
>
> Thank you for helping on the boll band AFL. I like your scan with
the % variable method and the changes in color on your graphs.
>
> What a Awesome Group we have here! I learned a lot today.
>
> Cheers,
> Brian
>
>
> ----- Original Message -----
> From: nirvana1x
> To: amibroker@xxxx
> Sent: Monday, June 24, 2002 4:53 PM
> Subject: [amibroker] Re: AFL- Needs help( bband range with
variable percentage).
>
>
> hi brian.
> this seems to look more promising.
> I have modified this formula so that you can choose a value for
the
> percentage differense you would like the bbands to narrow.
> I have thought of a few ways to do this and using the LLV of
10
> days probably will not get the results you want.
> As it may narrow more after the signal is true and the
question
> you asked was for the bband contraction to be at its llv 10.
>
> so what i did was to use the HHV 10 diff of the high bband and
the
> low bband and take a percentage of this to use as the value that
the
> range of the bband contraction should be below.
>
> the reason i did this was that if i used a fixed value certain
> stocks could trigger while the diff of the bband range was not to
far
> from the previous range as some stocks did not have a huge
variation
> in their high to low range of the bband and vice versa.
> so i needed to use something in the actual individual stock
to
> use due to each stock having its own character.
>
> adjust the diff value as you want .
> you can use it in the indi builder or run it in the explorer.
>
> when running an exploration and the befafter variable is set
to
> 1, it will find the stocks with the true condition but a day
after
> the true value is not true anymore,
> changing the value of the befafter variable to zero will find the
> true cond a day after its true.
>
>
>
> diffvalue=0.3;
> befAfter=1;//0=1Day After True, 1=1 Day After NOT True.
> bbtop = BBandTop(Close, 35, 2);
> bbbot = BBandBot(Close, 35, 2);
>
> Aa=bbtop-bbbot;
> gg=IIf(aa>Ref(HHV(Aa,10),-1),1,0);
> gg2=ValueWhen(gg==1,Aa,1);
> Cc2=gg2*diffvalue;
> bb3=IIf(Aa<Cc2,1,0);
> dd=IIf(BarsSince(bb3==befAfter)==1,1,0);
> Plot(bbbot,"",4+bb3,4);
> Plot(bbtop,"",4+bb3,4);
> Plot(C,"",1,64);
>
> Filter = Close > 0 AND Close < 25 AND Volume > 5000 AND dd==1;
>
> AddColumn(C,"close");
> AddColumn(Aa,"bbanddiff");
> AddColumn(dd,"dd");
> AddColumn(V,"volume");
> AddColumn(RSI(),"rsi");
> AddColumn(ADX(),"adx");
>
> I gave it a run on the ASX and only came up with 8 stocks.
>
> cheers: john.
>
> --- In amibroker@xxxx, "Brian Elijah" <cadvantag@xxxx> wrote:
> > I was looking to find volatility or extreme
tightness/contraction
> with the bands. This exploration returned no stocks
> >
> > Basically I wanted yesterday to be the point of lowest distance
> between the bands over the past 10 days- How can I adjust this
AFL.
> >
> > Thanks in Advance,
> >
> > Brian
> >
> >
> >
> > bbtop = BBandTop(Close, 35, 2);
> >
> > bbbot = BBandBot(Close, 35, 2);
> >
> > Yesterdaybbtop = Ref( MA( bbtop, 50 ), -1 );
> >
> > Yesterdaybbbot = Ref( MA( bbbot, 50 ), -1 );
> >
> > Yesterdaybbtopp = Ref( MA( bbtop, 50 ), -10 );
> >
> > Yesterdaybbbott = Ref( MA( bbbot, 50 ), -10 );
> >
> >
> > bandlow = LLV( MA( bbtop, 50 ), -1 );
> >
> > bandhigh = HHV(MA( bbbot, 50 ), -1 );
> >
> > bandlowa = LLV( MA( bbtop, 50 ), -10 );
> >
> > bandhighb = HHV(MA( bbbot, 50 ), -10 );
> >
> > Filter = Close > 0 AND Close < 25 AND Volume > 5000 AND
> (Yesterdaybbtop + Yesterdaybbbot < Yesterdaybbtopp +
Yesterdaybbbott)
> AND (bandlow + bandhigh) < (bandlowa + bandhighb);
> >
> >
> > NumColumns = 4;
> >
> > Column0 = Close;
> >
> > Column0Name = "Close";
> >
> >
> > Column1 = Volume;
> >
> > Column1Name = "Volume";
> >
> > Column2 = RSI();
> >
> > Column2Name = "RSI";
> >
> > Column3 = ADX();
> >
> > Column3Name = "ADX";
>
>
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