Amibroker For Dummies........a Beginner's Forum On How To Use Amibroker

will this thread serve its purpose?

  • yes

    Votes: 397 93.2%

  • no

    Votes: 29 6.8%
  • Total voters
    426
a1b1trader

a1b1trader

Well-Known Member
#512
#512
amitrandive said:
System low on memory.

http://www.amibroker.com/guide/x_performance.html
https://groups.yahoo.com/neo/groups/amibroker/conversations/messages/170087
https://groups.yahoo.com/neo/groups/amibroker/conversations/messages/170090
Click to expand...
Thanks Amit for providing links for solution.

I tried for the following solution

To avoid running out of memory, go to Tools->Preferences, "Data" and decrease the size of in-memory cache. To set it to minimum, enter "11" (eleven) into "in-memory cache (max. symbols)".

What should be the right value for this cache.

When I tried to change the value from 10000 (default value) to 1000.
A confirmation asking pop up appeared, that says

"you have change data cache settings. Do you want to flush quotation center to apply the change right now."

I did not press yes, as I do not know what it will do. So please let me know what it will do. Will it delete some data of it own.

Or there is any easy way to solve this problem

Further I have some tickers in 1 min data in my database for say last 2 years that I want to change with eod data for last 18 months. Can I do it without any problem. Can I save EOD data files in IEOD data settings. What should be the steps to do it. I just do not want to do something, that I do not know, as I have a big database (though I want to reduce it in size)

Thanks
 
amitrandive

amitrandive

Well-Known Member
#513
#513
a1b1trader said:
Thanks Amit for providing links for solution.

I tried for the following solution

To avoid running out of memory, go to Tools->Preferences, "Data" and decrease the size of in-memory cache. To set it to minimum, enter "11" (eleven) into "in-memory cache (max. symbols)".

What should be the right value for this cache.

When I tried to change the value from 10000 (default value) to 1000.
A confirmation asking pop up appeared, that says

"you have change data cache settings. Do you want to flush quotation center to apply the change right now."

I did not press yes, as I do not know what it will do. So please let me know what it will do. Will it delete some data of it own.

Or there is any easy way to solve this problem

Further I have some tickers in 1 min data in my database for say last 2 years that I want to change with eod data for last 18 months. Can I do it without any problem. Can I save EOD data files in IEOD data settings. What should be the steps to do it. I just do not want to do something, that I do not know, as I have a big database (though I want to reduce it in size)

Thanks
Click to expand...
a1b1trader

Do not know about this. We need expert advice.
Please post this query in Happy Singh's post.
http://www.traderji.com/amibroker/90119-simple-coding-help-no-promise-170.html
 
E

eyeamravi

Member
#514
#514
Hi
can someone plz help me write an afl,as i m new to it.

My logic is:

A= V>Ref(V,-1);

B=V/Ref(V,-1)> Ref(V,-1)/Ref(V,-2) AND V>Ref(V,-1) AND Ref(V,-1)>Ref(V,-2);

I want that (1) whenever A occurs, an up arrow is plotted over volume bar.
(2) whenever B occurs, a letter 'P' (indicating peak volume) is written over volume bar.

What would be volume formula for it?

Thanks n Regards
Ravi
 
manishchan

manishchan

Well-Known Member
#515
#515
I want to view 2 scripts in 1 window (seperate panes of course :D ). Ex.. Want to have 1 tab open for 15 min view with 2 panes. Top is NF Bottom is BNF.

Please let me know if anyone knows how to do it.
 
G

Grules

Member
#519
#519
I dont know how many of you have used chart nexus ( good free EOD). It has a paid subscription of showing support and resistances on charts. I am sure there must be good AFL on it , Can anyone share the same. Many thanks in advance.
 
a1b1trader

a1b1trader

Well-Known Member
#520
#520
Grules said:
I dont know how many of you have used chart nexus ( good free EOD). It has a paid subscription of showing support and resistances on charts. I am sure there must be good AFL on it , Can anyone share the same. Many thanks in advance.
Click to expand...
For support and resistance.
Here is one
But whether it is good or not, it is you to decide

Code: 
_SECTION_BEGIN("Resistance");

HaClose =EMA((O+H+L+C)/4,3);
HaOpen = AMA( Ref( HaClose, -1 ), 0.5 );
HaHigh = Max( H, Max( HaClose, HaOpen ) );
HaLow = Min( L, Min( HaClose, HaOpen ) );
Temp = Max(High, HaOpen);
Temp = Min(Low,HaOpen);

supres=ParamToggle("Sup_Res","No|Yes",1);
if(supres)
{


Prd1=Param("Res_Period1",2,0,200,1);

test = TEMA ( High , Prd1 ) ;

PK = test > Ref(test,-1) AND Ref(test,1) < High;//Peak
PKV0 = ValueWhen(PK,haHigh,0);//PeakValue0
PKV1 = ValueWhen(PK,haHigh,1);//PeakValue1
PKV2 = ValueWhen(PK,haHigh,2);//PeakValue2

MPK = PKV2 < PKV1 AND PKV1 > PKV0 ;//MajorPeak

MPKV = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, PKV1,1); //MajorPeakValue
MPKD = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, DateNum(),1); //MajorPeakDate
SD = IIf(DateNum() < LastValue(MPKD,lastmode = True ), Null, LastValue(MPKV,Lastmode = True));//SelectedDate
Plot(SD, "Resist1", colorGreen,ParamStyle("ResStyle1",styleLine|styleNoTitle,maskAll));

MPKV2 = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, PKV1,2); //MajorPeakValue
MPKD2 = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, DateNum(),2); //MajorPeakDate
SD2 = IIf(DateNum() < LastValue(MPKD2,lastmode = True ), Null, LastValue(MPKV2,Lastmode = True));//SelectedDate
Plot(SD2, "Resist2", colorGreen,ParamStyle("ResStyle2",styleLine|styleNoTitle,maskAll));


MPKV3 = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, PKV1,3); //MajorPeakValue
MPKD3 = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, DateNum(),3); //MajorPeakDate
SD3 = IIf(DateNum() < LastValue(MPKD3,lastmode = True ), Null, LastValue(MPKV3,Lastmode = True));//SelectedDate
Plot(SD3, "Resist3", colorGreen,ParamStyle("ResStyle3",styleLine|styleNoTitle,maskAll));


MPKV4 = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, PKV1,4); //MajorPeakValue
MPKD4 = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, DateNum(),4); //MajorPeakDate
SD4 = IIf(DateNum() < LastValue(MPKD4,lastmode = True ), Null, LastValue(MPKV4,Lastmode = True));//SelectedDate
Plot(SD4, "Resist4", colorGreen,ParamStyle("ResStyle4",styleLine|styleNoTitle,maskAll));



MPKV5 = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, PKV1,5); //MajorPeakValue
MPKD5 = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, DateNum(),5); //MajorPeakDate
SD5 = IIf(DateNum() < LastValue(MPKD5,lastmode = True ), Null, LastValue(MPKV5,Lastmode = True));//SelectedDate
Plot(SD5, "Resist5", colorGreen,ParamStyle("ResStyle5",styleLine|styleNoTitle,maskAll));


MPKV6 = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, PKV1,6); //MajorPeakValue
MPKD6 = ValueWhen(Ref(MPK,-1) == 0 AND MPK == 1, DateNum(),6); //MajorPeakDate
SD6 = IIf(DateNum() < LastValue(MPKD6,lastmode = True ), Null, LastValue(MPKV6,Lastmode = True));//SelectedDate
Plot(SD6, "Resist6", colorGreen ,ParamStyle("ResStyle6",styleLine|styleNoTitle,maskAll));




_SECTION_END();

HaClose =EMA((O+H+L+C)/4,3);
HaOpen = AMA( Ref( HaClose, -1 ), 0.5 );
HaHigh = Max( H, Max( HaClose, HaOpen ) );
HaLow = Min( L, Min( HaClose, HaOpen ) );
Temp = Max(High, HaOpen);
Temp = Min(Low,HaOpen);

_SECTION_BEGIN("Support");
//SP=L > Ref(L,-1) AND Ref(L,1) < L;//Peak

Prd2=Param("Sup_Period1",2,0,200,1);

test2 = TEMA ( Low , Prd2 ) ;

SP = Ref(test2,1) > Low AND test2 < Ref(test2,-1);//Peak
SPV0 = ValueWhen(SP,haLow,0);//PeakValue0
SPV1 = ValueWhen(SP,haLow,1);//PeakValue1
SPV2 = ValueWhen(SP,haLow,2);//PeakValue2

//PKV5 = ValueWhen(PK,haHigh,5);//PeakValue5
//PKV6 = ValueWhen(PK,haHigh,6);//PeakValue6

MSP = SPV2 > SPV1 AND SPV1 < SPV0 ;//MajorPeak

MSPV = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, SPV1,1);
MSPD = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, DateNum(),1);
SD = IIf(DateNum() < LastValue(MSPD,lastmode = True ), Null, LastValue(MSPV,Lastmode = True));
Plot(SD,"Support1", colorBrown,ParamStyle("SupportLine1",styleLine|styleNoTitle,maskAll));



MSPV2 = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, SPV1,2);
MSPD2 = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, DateNum(),2);
SD2 = IIf(DateNum() < LastValue(MSPD2,lastmode = True ), Null, LastValue(MSPV2,Lastmode = True));
Plot(SD2,"Support2", colorBrown,ParamStyle("SupportLine2",styleLine|styleNoTitle,maskAll));



MSPV3 = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, SPV1,3);
MSPD3 = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, DateNum(),3);
SD3 = IIf(DateNum() < LastValue(MSPD3,lastmode = True ), Null, LastValue(MSPV3,Lastmode = True));
Plot(SD3,"Support3", colorBrown,ParamStyle("SupportLine3",styleLine|styleNoTitle,maskAll));


MSPV4 = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, SPV1,4);
MSPD4 = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, DateNum(),4);
SD4 = IIf(DateNum() < LastValue(MSPD4,lastmode = True ), Null, LastValue(MSPV4,Lastmode = True));
Plot(SD4,"Support4", colorBrown,ParamStyle("SupportLine4",styleLine|styleNoTitle,maskAll));


MSPV5 = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, SPV1,5);
MSPD5 = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, DateNum(),5);
SD5 = IIf(DateNum() < LastValue(MSPD5,lastmode = True ), Null, LastValue(MSPV5,Lastmode = True));
Plot(SD5,"Support5", colorBrown,ParamStyle("SupportLine5",styleLine|styleNoTitle,maskAll));


MSPV6 = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, SPV1,6);
MSPD6 = ValueWhen(Ref(MSP,-1) == 0 AND MSP == 1, DateNum(),6);
SD6 = IIf(DateNum() < LastValue(MSPD6,lastmode = True ), Null, LastValue(MSPV6,Lastmode = True));
Plot(SD6,"Support6", colorBrown,ParamStyle("SupportLine6",styleLine|stylehidden|styleNoTitle,maskAll));

}

_SECTION_BEGIN("Price");
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() ); 
_SECTION_END();
 
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