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Anthony,
The formula returns results ONLY for the LAST available
bar (not for date range). That's why.
You would need to modify it if you want it to use with from-to range.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "Anthony Faragasso" <ajf1111@xxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Sunday, April 20, 2003 6:59 PM
Subject: Re: AmiBroker 4.31.1 BETA released, was [amibroker] AmiBroker 4.31.0 BETA released
> Tomasz,
>
> Please check the image attached....I used your supplied formula....and
> selected a range of dates : From and To....then clicked explore....no
> results were returned....is there a step missing.
>
> Thank you
> Anthony
>
> -------Original Message-------
>
> From: amibroker@xxxxxxxxxxxxxxx
> Date: Sunday, April 13, 2003 12:15:09
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: Re: AmiBroker 4.31.1 BETA released, was [amibroker] AmiBroker 4.31
> 0 BETA released
>
> Dale,
>
> Yes it is possible to perform optimization using for loop inside exploration
> code:
>
> Sample code follows, it runs optimization inside for loop and reports only
> THE BEST
> result. It should be run usign "EXPLORE". The code in fact runs several
> backtests inside 'for' loop and notes the best result and best parameter
> range.
> bestequity = 0;
> bestrange = 0;
> // optimization loop
> for( range = 12; range < 40; range ++ )
> {
> Buy = Cross( Close, EMA( Close, range ) );
> Sell = Cross( EMA( Close, range ), Close );
> Le = LastValue( Equity() );
> if( Le > bestequity )
> {
> bestequity = Le;
> bestrange = range;
> }
> }
> range = bestrange;
> Buy = Cross( Close, EMA( Close, range ) );
> Sell = Cross( EMA( Close, range ), Close );
> Filter = BarIndex() == BarCount - 1;
> AddColumn( bestrange, "Best range" );
> AddColumn( Equity(), "Best Equity" );
>
>
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: dingo
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Sunday, April 13, 2003 5:20 PM
> Subject: RE: AmiBroker 4.31.1 BETA released, was [amibroker] AmiBroker 4.31
> 0 BETA released
>
>
> Bodacious Binary TJ!
>
> After seeing how quiet you've been these last few weeks I started getting
> excited... and I was happily rewared this am when I saw your message!
>
> In trying to get my thinking together on this: is it now possible to
> simulate an optimization when running an Exploration by using the FOR
> construct? What I'm trying to do is get some extra columns that contain
> calculated data during an Optimization. SInce you can't use the Addcolumn in
> the Optimizer I've been wondering how I might go about this using the FOR
> (or even the While). If you have a few moments could you illustrate how
> this might be done (if possible) using a simple example?
>
> d
>
> -----Original Message-----
> From: Tomasz Janeczko [mailto:amibroker@xxxxxx]
> Sent: Sunday, April 13, 2003 10:07 AM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: AmiBroker 4.31.1 BETA released, was [amibroker] AmiBroker 4.31.0
> BETA released
>
>
> Hello,
>
> A new version 4.31.1 BETA is available now
> for download from:
> http://www.amibroker.com/members/bin/ab4311beta.exe
>
> It fixes bug introduced in 4.31.0 that caused no text output
> in commentary/interpretation window.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: Tomasz Janeczko
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Sunday, April 13, 2003 11:07 AM
> Subject: [amibroker] AmiBroker 4.31.0 BETA released
>
>
> Hello,
>
> A new beta version (4.31.0) of AmiBroker has just been released.
>
> It is available for registered users only from the members area at:
> http://www.amibroker.com/members/bin/ab4310beta.exe
>
> If you forgot your user name / password to the members area
> you can use automatic reminder service at: http://www.amibroker.com/login
> html
>
> This release brings huge improvement to AFL:
> for and while loops and if-else flow control statements.
>
> Native AFL loops run 2..3 times faster than JScript (according to my
> preliminary tests on arrays with 1000-5000 bars)
>
> For more details and example code please read the following "READ ME" text.
>
> NOTE: from now on all beta releases will be available to registered
> users only (in member area).
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
>
>
> AmiBroker 4.31.0 Beta Read Me
> April 13, 2003 10:38
> THIS IS AN EARLY BETA VERSION OF THE SOFTWARE. EXPECT BUGS !!!
> AGAIN: THIS IS AN EARLY BETA VERSION OF THE SOFTWARE. EXPECT BUGS !!!
>
> Backup your data files and entire AmiBroker folder first!
> INSTALLATION INSTRUCTIONS
> IMPORTANT: This archive is update-only. You have to install full version 4
> 30 first.
> Just run the installer and follow the instructions.
> Then run AmiBroker. You should see "AmiBroker 4.31.0 beta" written in the
> About box.
> CHANGES FOR VERSION 4.31.0 (as compared to 4.30.0)
> Workspace window uses "icon font" set in the Windows settings instead of
> hard coded Tahoma 8
> for better readability and ClearType(tm) compatibility on WinXP, all dialog
> windows use now 'MS Shell Dlg' face name that maps to standard MS Sans Serif
> on Win 9x/Me/NT and Tahoma on Win 2K and XP.
> rewritten AFL parser, now formula is parsed and coverted to syntax tree and
> then interpreted. This would allow further improvements including
> compilation. This allowed also to add loops/if-else statements.
> implemented IF/ELSE statement, WHILE and FOR loops:
> The same basic 'for' loop in AFL is 2..3 times faster than in JScript
> Syntax follows C++/JScript style:
> while( conditional_expression ) statement;
> for( initializer_part; conditional_expression; iterator_part ) statement;
> if( conditional_expression ) statement;
> if( conditional_expression )
> statement;
> else
> statement;
> implemented compound statements: these are blocks of statements enclosed
> in opening and closing curly brace
> {
> statement1;
> statement2;
> ...
> statementN;
> }
> compound statement can appear anywhere when simple statement can.
> For example:
> i = 10;
> while( i < 20 )
> {
> Plot( MA( Close, i ), "MA" + WriteVal( i, 0 ), colorBlack + i );
> i = i + 1;
> }
> implemented C-style postfix and prefix increment/decrement operators
> i = 10;
> WriteIf( i++ );
> WriteIf( ++i );
> WriteIf( i );
> implemented array element access (subscript) operator []:
> WriteVal( Close[ 0 ] ); // prints the first bar of close array
> /* a sample low-level implementation of exponential moving average in AFL */
> myema[ 0 ] = Close[ 0 ];
> for( i = 1; i < BarCount; i++ )
> {
> myema[ i ] = 0.1 * Close[ i ] + 0.9 * myema[ i - 1 ];
> }
>
>
> added built-in constant 'BarCount' that returns number of bars available in
> arrays (the number of elements of array)
> When QuickAFL is turned on it may be less than true number of bars because
> QuickAFL feature attempts to use only visible bars (and few before). You can
> control how many bars the formula requires using SetBarsRequired() function
> implemented infinite-loop protection. Nice if you forgot to increment
> counter variable in 'for' loop :-)
> tab key now works without need to press ALT/CTRL in AFL editors
> added C-like synonyms for logical ADD/OR/NOT: &&, ||, !
>
> /* a sample low-level implementation of Profit-target stop in AFL: */
> Buy = Cross( MACD(), Signal() );
> priceatbuy=0;
> for( i = 0; i < BarCount; i++ )
> {
> if( priceatbuy == 0 && Buy[ i ] )
> priceatbuy = BuyPrice[ i ];
> if( priceatbuy > 0 && SellPrice[ i ] > 1.1 * priceatbuy )
> {
> Sell[ i ] = 1;
> SellPrice[ i ] = 1.1 * priceatbuy;
> priceatbuy = 0;
> }
> else
> Sell[ i ] = 0;
> }
> /* sample EMA rainbow */
> Plot( Close, "Price", colorBlack, styleCandle );
> for( Range = 15; Range < 100; Range++ )
> Plot( EMA( Close, Range ), "MA"+WriteVal(Range,0), colorRose + Range % 8,
> styleNoLabel );
> HOW TO REPORT BUGS
> If you experience any problem with this beta version please send detailed
> description of the problem (especially the steps needed to reproduce it) to
> bugs@xxxxxxxxxxxxx
>
>
> Send BUG REPORTS to bugs@xxxxxxxxxxxxx
> Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
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> (Web page: http://groups.yahoo.com/group/amiquote/messages/)
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> html
>
> Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
>
>
> Send BUG REPORTS to bugs@xxxxxxxxxxxxx
> Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
> -----------------------------------------
> Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
> (Web page: http://groups.yahoo.com/group/amiquote/messages/)
> --------------------------------------------
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> html
>
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>
> Yahoo! Groups Sponsor
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>
>
> Send BUG REPORTS to bugs@xxxxxxxxxxxxx
> Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
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> Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
> (Web page: http://groups.yahoo.com/group/amiquote/messages/)
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>
> Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
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>
>
> Send BUG REPORTS to bugs@xxxxxxxxxxxxx
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> Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
> (Web page: http://groups.yahoo.com/group/amiquote/messages/)
> --------------------------------------------
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