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Tomasz,
You've already got a MetaStock killer, aiming at TradeStation now are we???
--
Nigel
On Sun, 13 Apr 2003 07:07 pm, Tomasz Janeczko wrote:
> 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)
>
> a.. Workspace window uses "icon font" set in the Windows settings instead
> of hard coded Tahoma 8 b.. 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. c.. 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.
> d.. 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;
>
> e.. 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;
> }
>
> f.. implemented C-style postfix and prefix increment/decrement operators
>
> i = 10;
> WriteIf( i++ );
> WriteIf( ++i );
> WriteIf( i );
>
> g.. 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 ];
> }
>
>
>
> h.. 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
>
> i.. implemented infinite-loop protection. Nice if you forgot to increment
> counter variable in 'for' loop :-)
>
> j.. tab key now works without need to press ALT/CTRL in AFL editors
>
> k.. 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
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