Hi Tomasz,
I have re-read the article.
This is the simple test script I'm playing with:
GraphXSpace = 5;
SetTradeDelays(0, 0, 0, 0);
SetChartOptions(0, chartShowArrows | chartShowDates | chartWrapTitle);
arrBuyLevel = Ref(HHV(High, 3), -1);
arrSellLevel = Ref(LLV(Low, 3), -1);
// Buy and sell levels and signals (stop orders)
BuyPrice = IIf(Open > arrBuyLevel, Open, arrBuyLevel);
SellPrice = IIf(Open < arrSellLevel, Open, arrSellLevel);
Buy = (High >= arrBuyLevel && Status("barinrange"));
Sell = (Low <= arrSellLevel && Status("barinrange"));
Buy = ExRem(Buy, Sell);
Sell = ExRem(Sell, Buy);
Buy = IIf(Sell, 0, Buy);
Sell = IIf(Buy, 0, Sell);
Plot(Close, "Close", colorBlack, styleBar | styleNoTitle);
Plot(arrBuyLevel, "BuyLevel", colorGreen, styleLine | styleNoTitle);
Plot(arrSellLevel, "SellLevel", colorRed, styleLine | styleNoTitle);
PlotShapes(IIf(Buy && Status("barinrange"), shapeSmallCircle,
shapeNone), colorGreen, 0, BuyPrice, 0);
PlotShapes(IIf(Sell && Status("barinrange"), shapeSmallCircle,
shapeNone), colorRed, 0, SellPrice, 0);
SetBarsRequired(5, 0);
This is the screenshot if the whole ticker with an area of backtest
(trade arrows are shown): Screenshot
<http://img193.imageshack.us/img193/3127/screenvvs.jpg>
All I want is to work only with that part of graph that is inside the
range I've specified in the backtester. Could you please explain how
this can be achieved with such a simple test script ?
Thanks in advance.
Regards,
Roman.
--- In [email protected], "Tomasz Janeczko" <gro...@...> wrote:
>
> Hello,
>
> Re-read the article.
>
> If you read the article carefully enough you will see that you should
put that function at the END
> of formula if you don't want the functions you are using to add to bar
requirements.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "roman_tatkin" roman.tat...@...
> To: [email protected]
> Sent: Tuesday, September 01, 2009 5:51 PM
> Subject: [amibroker] Re: Is it possible to avoid drawing of
unnecessary data from database ?
>
>
> > Hi Tomasz,
> >
> > Thank you for the rapid answer. I have looked into the material
you've sent, very clear and straight explanation. The only problem
> > is that even when I put SetRequiredBars(1000, 0) at the very
beginning of my script nothing changes - I still see all 300000 bars
> > on the chart.
> >
> > 'Use QuickAFL' in the settings of backtester is checked. What I'm
doing wrong ? May be you can provide some primitive script to
> > play with to understand how QuickAFL affects things ? Thanks in
advance.
> >
> > Regards,
> > Roman.
> >
> > --- In [email protected], "Tomasz Janeczko" groups@ wrote:
> >>
> >> Yes http://www.amibroker.com/kb/2008/07/03/quickafl/
> >>
> >> Best regards,
> >> Tomasz Janeczko
> >> amibroker.com
> >> ----- Original Message -----
> >> From: "roman_tatkin" Roman.Tatkin@
> >> To: [email protected]
> >> Sent: Monday, August 31, 2009 10:37 AM
> >> Subject: [amibroker] Is it possible to avoid drawing of unnecessary
data from database ?
> >>
> >>
> >> > Say, I have a database with single ticker that has 300000 bars. I
don't want to have all 300000 bars drawn all the time, last
> >> > 50000 bars are enough in 90% cases.
> >> >
> >> > Is it possible to specify the limits that AMI should work with ?
Say, from 2006.01.01 to 2008.01.01 or something like that.
> >> >
> >> > That's possible when backtesting, however, I could not find such
an option for general purpose drawing.
> >> >
> >> > Thanks in advance.
> >> >
> >> >
> >> >
> >> > ------------------------------------
> >> >
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> >>
> >
> >
> >
> >
> > ------------------------------------
> >
> > **** IMPORTANT PLEASE READ ****
> > This group is for the discussion between users only.
> > This is *NOT* technical support channel.
> >
> > TO GET TECHNICAL SUPPORT send an e-mail directly to
> > SUPPORT {at} amibroker.com
> >
> > TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
> > http://www.amibroker.com/feedback/
> > (submissions sent via other channels won't be considered)
> >
> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> > http://www.amibroker.com/devlog/
> >
> > Yahoo! Groups Links
> >
> >
> >
>
