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Hello,
Yes it does because of
statements like this:
Volscale*LastValue(Highest(V);
Combination of LastValue and Highest makes it necessary
to use all bars to calculate last highest value from all data.
You should avoid such statements and replace
:
Plot(AvgVol,"",colorGold,styleNoTitle|ParamStyle("Style",styleHistogram|styleOwnScale|styleThick|styleNoLabel,maskHistogram),
0,Volscale*LastValue(Highest(V)));
by:
Plot(AvgVol,"",colorGold,styleNoTitle|ParamStyle("Style",styleHistogram|styleOwnScale|styleThick|styleNoLabel,maskHistogram),VolScale);
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
Sent: Thursday, April 14, 2005 1:36
PM
Subject: Re: [amibroker] IB RT +
Foreign() + 100% CPU Usage -- price formula
hello tomasz,
i don't use built-in price
formulas, i have made some custom formulas. does this formula require all
bars?
_SECTION_BEGIN ("Price pair01a");
//MPT
//PRICE for pair01a (Intraday)
//General & Time
#pragma
nocache
#include <MPT Active Pairs.afl>
#include
<pairEODValues.afl>
SetForeign (pair01a);
AvgVol= MA(V,5000);
pair01aiC= TimeFrameGetPrice("C",inDaily,-1);
RestorePriceArrays ();
SetForeign (pair01a,0);
y=(jahr- 1900)*10000;
m= 100*monat;
d=tag;
time=y+m+d;
//Close & Volume
ydayclose= IIf(DateNum()>time,pair01aC,pair01aiC);
V= IIf(DateNum()>time,V*100,V);
//Color & Scale
Volcolor= IIf(V>AvgVol,colorLightOrange,colorLavender);
Volscale= Param("Volume Scale",0.001,0.001,1,0.001);
//Plot
Plot (C,"",1,64);
Plot (ydayclose,"",6,8|styleNoRescale);
Plot (ydayclose-pair01aATR,"",colorViolet,8|styleNoRescale);
Plot (ydayclose+pair01aATR,"",colorViolet,8|styleNoRescale);
Plot (V,"",Volcolor,styleNoTitle|ParamStyle("Style",styleHistogram|styleOwnScale|styleThick|styleNoLabel,maskHistogram)
, 0,Volscale*LastValue(Highest(V)));
Plot (AvgVol,"",colorGold,styleNoTitle|ParamStyle("Style",styleHistogram|styleOwnScale|styleThick|styleNoLabel,maskHistogram),
0 ,Volscale*LastValue(Highest(V)));
//C for Title
C =IIf(IsTrue(C),C,
IIf (IsTrue(Ref(C,-1)),Ref(C,-1),IIf(IsTrue(Ref(C,-2)),Ref(C,-2),IIf(IsTrue(Ref(C,-3)),Ref(C,-3),IIf(IsTrue(Ref(C,-4)),Ref(C,-4),
IIf (IsTrue(Ref(C,-5)),Ref(C,-5),IIf(IsTrue(Ref(C,-6)),Ref(C,-6),IIf(IsTrue(Ref(C,-7)),Ref(C,-7),IIf(IsTrue(Ref(C,-8)),Ref(C,-8),
IIf (IsTrue(Ref(C,-9)),Ref(C,-9),IIf(IsTrue(Ref(C,-10)),Ref(C,-10),IIf(IsTrue(Ref(C,-11)),Ref(C,-11),IIf(IsTrue(Ref(C,-12)),Ref(C,-12),Ref(C,-13))))))))))))));
//Title
Title = EncodeColor(colorBlue)+"01a "+pair01a+" "+EncodeColor(colorBrown)+Date()+EncodeColor(colorSeaGreen)+" V:
"+
WriteVal (V,1)+"\n"+EncodeColor(colorBlue)+WriteVal(O,1.2)+EncodeColor(colorGreen)+"\n"+WriteVal(H,1.2)+EncodeColor(colorRed)+"\n"+
WriteVal (L,1.2)+EncodeColor(colorBlack)+"\n"+WriteVal(C,1.2);
_SECTION_END ();
thank you for your
time,
dirk
----- Original Message -----
Sent: Thursday, April 14, 2005 1:09
PM
Subject: Re: [amibroker] IB RT +
Foreign() + 100% CPU Usage
Hello,
In addition to unchecking
"Force instant quote retrieval for all symbols"
box in File->Database
Settings-Configure,
Make also sure not to use old price chart
formula that was using LastValue() function (that causes all bars to be
required).
Instead use new price formula (without
LastValue), i.e:
SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close
%g (%.1f%%) {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 )
) ));
Plot(
C, "Close", ParamColor("Color", colorBlack ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() );
Best
regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
Sent: Thursday, April 14, 2005 12:25
PM
Subject: [amibroker] IB RT +
Foreign() + 100% CPU Usage
hello group,
i recently ran into problems
with 100% CPU usage running amibroker RT with IB plugin. i wondered if
someone could share some technical insight as to the tech specs needed for
the type of trading i am doing.
here is the
scenario:
i run amibroker pro RT with
the latest IB plugin. i switch between various layouts, which usually have
6 different windows open. one of these windows is my "statistics" formula
which references about 20, sometimes up to 40 different tickers via
Foreign() statements. the formula in itself does not include heavy
calculating (i think), no Cum() or other stuff, just some basic %change
and loads of WriteIf() and AlertIf(). - still it eats up 100% CPU
usage all the time, quite apparently because of all those Foreign()
statements.
what type of machine would i
need to run this type of scenario?
my specs: AMD Athlon 1700+,
256 RAM, Win XP, ADSL 512/128, AB Pro RT with IB, 1min database, chart
refresh at 20sec
specs needed ??
note that AB can actually do
this, my system does not hang up (for 6 and a half hours trading at 100%
CPU though) and i can trade the way i want to. but when switching between
layouts or alt-tabbing to another application, amibroker may take 5-20
secs.
so, what's the way? more
cpu? eSignal? is eSignal plugin less CPU-intensive?
thanks for any
insight,
dirk
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For other support material please check also:
http://www.amibroker.com/support.html
Please
note that this group is for discussion between users only.
To get
support from AmiBroker please send an e-mail directly to
SUPPORT {at}
amibroker.com
For other support material please check also:
http://www.amibroker.com/support.html
Do you Yahoo!?
Yahoo! Small Business - Try
our new resources site!
Please note that this group is for discussion between users only.
To get support from AmiBroker please send an e-mail directly to
SUPPORT {at} amibroker.com
For other support material please check also:
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