AmiBroker 6.40.4 Read Me

February 2, 2022 13:17

Backup your data files and entire AmiBroker folder first!

INSTALLATION INSTRUCTIONS

Run the installer and follow the instructions.

Then run AmiBroker. You should see "AmiBroker 6.40.4" written in the About box.

See CHANGE LOG below for detailed list of changes. Note that only changes that affect end-user directly are listed here. Internal code changes/refactoring is usually not mentioned.

UPGRADE POLICY: This version is a free upgrade for users who purchased AmiBroker license after December 30, 2019.

WHAT'S NEW IN 6.40:

• QuickGFX - brand new chart rendering engine
  
  delivering upto 100x performance boost in chart rendering time as compared to GDI. GDI rendering speed also improved upto 2x.
  
  In-house developed QuickGFX direct rendering technology completely bypasses Windows GDI and offers amazing 10x-100x performance gain as compared to GDI rendering

  To enable QuickGFX experimental tech go to Tools->Preferences, "Miscellaneous" tab, click "Experimental: Use QuickGFX render" and press "Apply" or "OK"
  You can see when it is enabled, chart timing footnote (when enabled) will say "QuickGFX render ...ms" instead of "GDI render ...ms"

  This is PROFESSIONAL edition feature only. Users of Standard version would need to purchase upgrade in order to use this feature.

• Automatic Analysis improvements
  • Easy Sequencing of multiple Analysis actions via #pragma sequence(scan,exploration) and new "Run Sequence" button without need to write batches. Allows for example single click two-step analysis runs creating composites or static variables in first step and using them in second step
  • Backtester - added "Max. position value" option in the settings allowing to specify maximum dollar value of position. Zero (0) means no maximum. Positions larger will be shinked (if shrinking is enabled) or won't be entered at all (if shrinking is disabled)
  • huge speedups in running large explorations, dark theme and 5x speed up for rendering huge list views like (as compared to 6.31)
    
• AmiBroker Formula Language new functions / features
  • FindIndex( array, value, start_from = 0, dir = 1 ) - find index of array item matching specified value
  • BarsSinceCompare( past, comparison, current ) - for every bar, compare past array values with current bar value and return the number of bars since last time comparision was true
  • InternetSetHeaders( "headers" ) - set custom HTTP headers for subsequent web requests
  • InternetSetOption( option, value ) - set HTTP option for internet session
  • MxCopy() - in-place copy of rectangular blocks from one matrix to the other (copy portions of one matrix to the other matrix)
  • _exit() - gracefully ends AFL execution at the point of the call
  • InternetGetStatusCode() - returns HTTP status code of last InternetOpenURL or InternetPostRequest call
  • Chr( code ) returns string representing single character of given ascii code
  • GetObject( path, class ) providing functionality equivalent to JScript GetObject and VBScript GetObject
  • GuiSendKeyEvents("ED") - register given characters to be sent as Gui event when keyboard key is pressed. GuiGetEvent will return code == notifyKeyDown and id of given character, for example id == 'D' for D letter
  • inverf(x) - inverse of erf function
  • erf(x) - computes Error function https://en.wikipedia.org/wiki/Error_function
  • SafeDivide( x, y, valueifzerodiv )- safe division that handles division by zero using special handling (replace result with user-defined value)
  • new Javascript engine (Chakra) featuring native JSON support (EnableScript("chakra"))
    
• AmiBroker Formula Language improvements, enhancements and fixes
  • exponentation operator is made 50-100x faster in cases of small integer exponents of 2, 3, 4 and 5
  • GuiSetText() function avoids sending change notifications to prevent update loops
  • ADX function vectorized (2x faster than before)
  • added extra parameter for Error() function to stop execution
  • internal function signatures changed to allow flexible ordering of arguments regardless of their type and varargs with less overhead
  • GfxDrawImage with PNG images exclusive file lock removed
  • parser warns if empty body is used in 'for' or 'while' statements
  • support for gzip and deflate compression in Internet functions
  • plugin interface backward compatibility with changing function signatures
  • more runtime checks to prevent user errors and other fixes
    
• Batch window new features / improvements
  • Clipboard Cut/Copy/Paste implemented in batch editor
  • Edit->Delete (from main menu) and Edit-Delete All implemented for completeness
  • list view uses virtual mode now (owner data)
  • added "add results to watchlist" action / WatchlistAddResults
  • added "clear watchlist" action / WatchlistClear
  • added "comment" action
  • added optional parameter to Data Import ASCII command to allow specify format definition file
  • added optional parameter to Execute and Wait command to specify current working directory for command
  • added optional parameter to Export to File / Export walk-forward to file to specify column separator in CSV files
    -optional parameter defines the column SEPARATOR used for export. Only single character is used. When it is not supplied, comma is used.
    
• AFL editor enhancements
  • call tips (parameter information tooltips) now provide extra description about the function and its parameters (as of v6.39 only 20 functions have this extra info)
  • debugging session is automatically terminated with appropriate notice when user attempts to edit the code during debugging (this saves mouse clicks that were needed to stop debug session in order to edit)
  • previously when no text was selected and Prettify Code was choosen, the message box caused main frame to get focus instead of focus staying in AFL frame. Fixed
  • when an runtime error is detected debugging session the message bar shows now number of detected errors (as it did previously during normal "verify"
  • when dark mode list views are used watch window default text color was black making it hardly visible, changed to white
  
  
• User Interface new features and improvements:
  • Dark theme for all owner-draw list views (NOT in dialogs) now feature customizable theme (currently available "system (light) theme" and "black theme") - go to Tools->Customize, "Appearance" tab, "Dark mode for listviews" checkbox
  • 5x speed up for rendering huge list views (bypassing Windows rendering)
  • Preferences: added Text Tool font setting independent from Axis font (Preferences->Miscellaneous page)
  • Charts: improved text tool with per-study selectable font size
  • Parameter names are not truncated in HighDPI screens
    
• Database improvements
  • new 8-digit ICB structure implemented: https://www.ftserussell.com/data/industry-classification-benchmark-icb
  • Database Purify is 10x faster
  • OLE: added Stock.Quotations.Adjust function to perform adjustments programmatically OLE: added Stock.Quotations.Adjust() function. long Adjust(BSTR pszFieldList, float fMultiplier, float fOffset, DATE dDateTime, boolean bBefore)

CHANGE LOG

CHANGES FOR VERSION 6.40.4 (as compared to 6.40.3)

• Charts: on specifically prepared formulas producing sparse array a moire effect with histogram chart can be seen under rare circumstances. Fixed.
• UI: when Tickerbar was customized in previous versions it could come up as empty in 6.40.2 until it is RESET via customize dialog. Fixed.
• QuickGFX, simple bar chart, width > 2, end caps are drawn to ensure that open/close ticks are visible in high zoom out levels
• Toolbar Zoom in/out auto-repeat period decreased to 100ms (from 150ms)
• QuickGFX: styleGradient wasn't supported in 6.40.2-6.40.3. Now it works again (fallback to GDI)
• Docs: added GuiSetColors to help file
• Charts: 3-color gradient charts could be drawn incorrectly if user-defined base line level was outside chart Y axis range. Fixed

CHANGES FOR VERSION 6.40.3 (as compared to 6.40.2)

• OLE: new Quotations.Adjust could enter infinite loop. Fixed
• QuickGFX: fixed division by zero on gradient fill when top == bottom
• QuickGFX: styleDashed implemented
• UI: on HiDPI screens Tickerbar dropdown item height was too small in 6.40.2. FIxed
• UI: Ticker bar has been reimplemented to allow quick handling of millions of symbols (done in 6.40.2 but missing in change log)
• UI: Ticker bar search / auto-complete is re-introduced (it was not working in 6.40.2 because TickerBar no longer uses standard combo box and combo box "built-in" features were absent)
• UI: when Tickerbar was customized in previous versions it could come up as empty in 6.40.2 until it is RESET via customize dialog. Fixed.

CHANGES FOR VERSION 6.40.2 (as compared to 6.40.0)

• AFL: regression new Error 72 was incorrectly generated when amount was zero but mode was set to Disable (like in Equity.afl file). The combination of zero amount and disable is of course valid and error is no longer produced in such case.
• New Analysis window: #pragma sequence(scan,backtest) - and new "Run Sequence" button to run same formula with same settings several times in sequence using different modes
• Charts: QuickGFX rendering of cloud style charts is now 100x faster
• Charts: GDI rendering of cloud style charts is now 2x faster
• 32-bit/Charts: x87 assembly code used for faster conversion from float to int. This gives +20% performance improvement in both GDI and QuickGFX rendering modes
• 64-bit: the size of internal exit signal structure increased to allow backtest with more than 1 million symbols (at the cost of increased RAM usage). 32-bit version still uses smaller structure and 1 million symbol limit
• AFL Editor: Defunct Print menu option removed from context (right-click) menu. Working Print option is available in File->Print menu
• AFL: _SECTION_BEGIN() - section name is checked against not allowed control characters
• AFL: array version of ColorHSB function is 50% faster now
• AFL: new function BarsSinceCompare( past, comparison, current ) - for every bar, compare past array values with current bar value and return the number of bars since last time comparision was true
• AFL: New warning 511 for incorrect usage of IIF function: "Assignment within IIF function arguments. Use IIF() return value instead"
• AFL: Param*() functions check if user passed non-printable/control characters, that are forbidden in parameter names and display appropriate error message
• AFL: Status("baseinterval") - new field "baseinterval" returns database base time interval setting in seconds
• AFL: Warning 501 (assignment within conditional) is silenced if assignment is made to the variable that wasn't intitialized before (i.e. it is first assignment of given variable ever in code)
• ASCII import: combination of $HYBRID 1 without "autoadd" mode produces an error on non-existing symbols now.
• Charts: 40% speedup in determination of auto-scale min/max (signficantly affects chart rendering performance for very large number of bars >500K)
• Charts: Bar-to-XPixel coordinate conversions speeded up 3x by using assembly in 32-bit and _div64/__emul intrinsics in 64-bit versions
• Charts: when QuickGFX was enabled multi-color title text was slightly truncated at the color boundaries. Fixed.
• DB: when user renames the symbol corresponding Note text file name is renamed accordingly now
• Fixed regression introduced in 6.39 when the very last value in MA was non-Null even if there was not enough data
• OLE: added Stock.Quotations.Adjust() function. long Adjust(BSTR pszFieldList, float fMultiplier, float fOffset, DATE dDateTime, boolean bBefore)
• QuickGFX: New lines in Title variables caused double spacing. Fixed
• QuickGFX: styleHistogram was invisible for negative values. Fixed
• UI: Param window, names of parameters are not tructated on HighDPI screens anymore
• When worker thread attempted to read string from resources sometimes resource handle was set incorrectly, this caused COleException / unknown error. Fixed by replacing faulty MS CString::LoadString implementation.
• QuickGFX: Line width > 1 implemented
• AFL: ADX/PDI/MDI protected against division by zero when data are completely flat (H == L == C for long periods of time)
• AFL: Warning 512 added to detect overusage of Foreign/SeForeign calls
• Analysis report charts: regression: when QuickGFX was enabled, report charts could cause exception. Fixed.

CHANGES FOR VERSION 6.40.0 (as compared to 6.39.1)

• Charts: added experimental QuickGFX direct rendering technology. QuickGFX completely bypasses Windows GDI and offers amazing 10x-100x performance gain as compared to GDI rendering
  
  To enable QuickGFX experimental tech go to Tools->Preferences, "Miscellaneous" tab, click "Experimental: Use QuickGFX render" and press "Apply" or "OK"
  You can see when it is enabled, chart timing footnote (when enabled) will say "QuickGFX render ...ms" instead of "GDI render ...ms"

  This is PROFESSIONAL edition feature only. Users of Standard version would need to purchase upgrade in order to use this feature.

• AFL: New Javascript engine from MS EDGE called "Chakra" added. Use EnableScript("chakra") to enable it
• AFL: Default Javascript engine upgraded to jscript9.dll - featuring native JSON object
• AFL Editor: added "MOD" indicator in the status bar to indicator current formula was modified
• AFL: variable period Sum() produces 0 instead of Null if range argument is 0 (or negative)
• AFL: variable period Sum(), MA(), StDev() could produce incorrect results when 'range' parameter fluctuated between 0 and 1 only. Fixed
• Analysis / Parameter dialog / ParamDate - after "reset all" it kept previously selected date and default was used only after reopening param window again. Fixed
• Charts: BarCount is now included in "Chart timing" information
• Copy/Paste from list view does not have trailing tab in the header line anymore
• Data: Split feature: auto-suggested split ratio X:Y now uses X, Y <= 10 (previously it was X, Y <= 5)
• If parser expression stack is exhausted Error 73: Internal parser error: memory exhausted is displayed
• Plugin interface: SetCategoryName now prevents setting too long names (>=40) for groups/markets/sectors that could previously result in DB corruption
• Tools->Database Purify is now >10x faster (in case of many reported errors even 100x faster than before)
• UI: added ability to switch on/off data tips via customizable keyboard shortcut (Tools->Customize, Keyboard) View->Options->Data Tips
• UI: added extra refresh for docking panes when they are expanded from the floating state

CHANGES FOR VERSION 6.39.1 (as compared to 6.39.0)

• 64-bit uses a bit faster float versions powf and modf instead of double pow/mod for ^ and % operators (non integers)
• Analysis/Settings: added 3 checks and warnings to prevent users from entering combination of MinPosValue/MaxPosValue/AllowPosShrinking/RoundLotSize that are likely to prevent all trades from being taken at all
• array ^ (exponentation) operator made 50-100x faster in special cases of small INTEGER, scalar exponents of 2, 3, 4 and 5 by using multiplication instead of calls to C runtime powf()
• calling GuiSetText from AFL formula caused notifyEditChange notification to be sent. If user formula responded to notification with another GuiSetText this could create loops. Now notifications are silenced if changes come from user code
• When one pane had Gui controls and the other pane on another chart sheet was completely blank, then GUI controls from populated tab remained displayed after switching to completely blank sheet. Fixed

CHANGES FOR VERSION 6.39.0 (as compared to 6.38.0)

• 64-bit: AmiBroker, AmiQuote, AFL Code Wizard migrated to newest VC++ 2019 for even better performance
• AFL Editor: @link commands are executed at mouse up (instead of previous mouse down) to prevent unwanted text selection when message boxes are dismissed
• AFL Editor: call tips (parameter information tooltips) now provide extra description about the function and its parameters (as of v6.39 only 20 functions have this extra info)
• AFL Editor: debugging session is automatically terminated with appropriate notice when user attempts to edit the code during debugging (this saves mouse clicks that were needed to stop debug session in order to edit)
• AFL Editor: previously when no text was selected and Prettify Code was choosen, the message box caused main frame to get focus instead of focus staying in AFL frame. Fixed
• AFL Editor: when an runtime error is detected debugging session the message bar shows now number of detected errors (as it did previously during normal "verify"
• AFL Editor: when dark mode list views are used watch window default text color was black making it hardly visible, changed to white
• AFL/CBT: AmiBroker now displays an error when user passes incorrect bar number to ProcessTradeSignals() instead of silently skipping wrong arguments
• AFL: added protection against assigning wrong types to some built-in variables such as *Price arrays. If wrong type is assigned the error 71 Type mismatch in assignment is displayed
• AFL: ADX() function vectorized in 64-bit version (2x faster than before)
• AFL: backtester crashed when user incorrectly assigned string value to BuyPrice/ShortPrice/CoverPrice arrays. Fixed.
• AFL: Error("text", stop=False) function - added extra parameter to stop execution regardless of "stop execution at first error" preference setting
• AFL: FindIndex( array, value, start_from = 0, dir = 1 ) - find index of array item matching specified value

  Returns:
  NUMBER - the index of matching array item
  if value is not found in the array, the function returns -1

  Parameters:
  array - input data
  value - what we are looking for
  start - the index to start the search from
  dir - the direction of the search, 1 is up, -1 is down

  
  Notes:
  start can be positive - then it refers to index number counting from the beginning of array
  or it can be negative then it refers to index counting from the END of the array

  
  // example find all indices when condition was true
condition = Cross( C, MA( C, 20 ) );

// search forwards
printf( "Search forwards:\n" );
for( index = 0; ( index = FindIndex( condition, True, index ) ) != -1; index++ )
{
     printf( "condition is true at index %g\n", index );
}

// search backwards
printf( "Search backwards:\n" );
for( index = -1; ( index = FindIndex( condition, True, index, -1 ) ) != -1; index-- )
{
     printf( "condition is true at index %g\n", index );
}

• AFL: If warning level >= 3, InternetOpenURL() function now displays a warning 507 if OS generated exception when accessing remote resource, the same way as InternetPostRequest
• AFL: increased calculated bar requirements for Wilders() function for better conformance with QuickAFL
• AFL: Last OS error code is set by Internet* functions regardless of warning level so you can always retrieve it using GetLastOSError()
• AFL: MA( C, BarCount ), StDev( C, BarCount ) return non-Null value
• AFL: new field added to SetOption/GetOpion function calls "MaxPosValue" (per backtest setting)
• AFL: new function InternetSetHeaders( "headers" ) - set custom HTTP headers for subsequent web requests
  For example to enable GZIP compression you need to use:

  INTERNET_OPTION_HTTP_DECODING = 65;
InternetSetOption( INTERNET_OPTION_HTTP_DECODING, 1 );
InternetSetHeaders("Accept-Encoding: gzip, deflate");

  - note that InternetPostRequest will automatically add "Content-Type: application/x-www-form-urlencoded" header unless user specifies their own Content-Type in the InternetSetHeaders call

• AFL: new function InternetSetOption( option, value ) - set HTTP option for internet session. Internet Options can be found here: https://docs.microsoft.com/en-us/windows/win32/WinInet/option-flags
  
  // how to request and handle GZIP compressed HTTP
INTERNET_OPTION_HTTP_DECODING = 65;
InternetSetOption( INTERNET_OPTION_HTTP_DECODING, 1 );
InternetSetHeaders("Accept-Encoding: gzip, deflate");
ih = InternetOpenURL("http://www.amibroker.com/news.html" );
if( ih )
{
    while( ( text = InternetReadString( ih ) ) != "" )
    {
       printf( "%s", text );
    }
    InternetClose(ih);
}

• AFL: new function MxCopy - for copying rectangular blocks from one matrix to the other (copy portions of one matrix to the other matrix)
  
  The function works in-place (ie. no allocation occurs - first argument is a reference to existing array and that array content would be overwritten)

  MxCopy( & dstmatrix, dst_start_row, dst_endrow, dst_start_col, dst_end_col, src_matrix, src_start_row = -1, src_end_row = -1, src_start_col = -1, src_end_col = -1 )

  src_start/src_end values equal to -1 mean "same value as corresponding dst_start/dst_end value"

  To perform a copy the number of columns multiplied by number of rows in source and destination "rectangles" must be the same
  In other words:
  (dst_end_row-dst_start_row+1)*(dst_end_col-dst_start_col+1) == (src_end_row-src_start_row+1)*(src_end_col-src_start_col+1)

  
  
• AFL: new function: _exit() - that gracefully ends AFL execution at the point of the call
• AFL: new function: InternetGetStatusCode function - returns HTTP status code of last InternetOpenURL or InternetPostRequest call. HTTP status codes are listed here: https://en.wikipedia.org/wiki/List_of_HTTP_status_codes
  
  // Example:
// NON existing page (should result in status code 404)
ih = InternetOpenUrl("http://www.amibroker.com/index3434.html" );
if( ih )
{
    printf("HTTP status code: %g", InternetGetStatusCode( ih ) );
    InternetClose( ih );
}
else
{
   printf("Internet connection can not be open because: %s", GetLastOSError() );
}

• Analysis/Backtest: added "Max. position value" option in the settings allowing to specify maximum dollar value of position. Zero (0) means no maximum. Positions larger will be shinked (if shrinking is enabled) or won't be entered at all (if shrinking is d
• Charts/Preferences: added Text Tool font setting independent from Axis font (Preferences->Miscellaneous page)
• Charts: Text Box tool supports user-selectable font size now (selectable in Study Properties window)
• Database: new 8-digit ICB structure implemented: https://www.ftserussell.com/data/industry-classification-benchmark-icb
• Got rid of obsolete "Request data on save" setting that wasn't performing as expected
• Plugin interface: added compatibility layer allowing old plugins to safely call functions even when they have modified signature (added new default parameters). When plugin calls function with less than expected number of arguments, missing some of defaul
• When variable was passed to user function by reference, ++ operator inside had no effect on referenced variable (outside of function). Fixed.

CHANGES FOR VERSION 6.38.0 (as compared to 6.35.1)

• 64-bit version could produce "Invalid parameter" exception from CRT after backtesting when symbols under test had forbidden characters in them like "%". Fixed
• 64-bit version: address space layout randomization disabled by /DYNAMICBASE:NO linker option to facilite easier crash location finding
• AFL: assignment new matrix value to a variable already holding matrix value did not immediately free memory (at the time of assignment). This memory was only freed at the end of the formula. Now it is freed earlier (at assignment) to lower memory usage.
• AFL: GetFnData("lastsplitdate") returns empty val instead of zero if last split date is not set
• AFL: GfxDrawImage with PNG file could fail if very same file was accessed simultaneously from multiple threads due to "no-sharing" mode that 3rd party XTP lib used. Fixed by using shareDenyWrite
• AFL: new function Chr( code ) returns string representing single character of given ascii code
• AFL: new function GetObject( path, class ) providing functionality equivalent to JScript GetObject and VBScript GetObject
• AFL: new function GuiSendKeyEvents("ED") - register given characters to be sent as Gui event when keyboard key is pressed. GuiGetEvent will return code == notifyKeyDown and id of given character, for example id == 'D' for D letter
• AFL: StaticVarAdd when scalar value was added to already existing static var array sometimes random value would appear. Fixed.
• AFL: when file creation or modication date was exact midnight fgetstatus() returned datetime indicating "eod mark" (date without time), now it gives 00:00:00
• Analysis: Maximum number of threads per single Analysis window has been increased to 64 (from 32)
• Backtester: generation of Buy&Hold stats was not working when "Allow position shrinking" was turned OFF by the user and commission > 0. Fixed
• Chart: Data window can now display upto 40 values per single chart pane
• Chart: Horizontal line snap to open price (keypress O) or close price (keypress C) was snapping to H-L instead. Fixed
• Charts: Snap to price - the meaning of threshold is changed - instead of % of price it now means % of chart height. So 5% will snap within +/-5 of chart height. This allows it to work universally across different securities (stocks/forex) and different zo
• IQFeed: improved IQFeed plugin (better support for long EOD histories in mixed mode)
• New Analysis: the name of column "contracts/shares" changes each time you change futures mode to prevent confusion among newbies
• Plugins: when AFL plugin crashes (throws structured exception) the editor and indicator windows will display call stack for easier debugging of 3rd party plugins
• UI: Dialog boxes are moved back main display screen if multi-monitor configuration was changed and multi-monitor setup is not rectangular (for example monitors of different sizes)
• UI: Listview sorting by (single) date column is now 10+ times faster
• UI: Listview uses non optimized parsing for str to date conversion for date formats that include names of the months instead of numbers (avoids problems with different names of months in different languages)
• UI: Main window and AFL Editor frame is moved back to (0,0) if multi-monitor configuration was changed and multi-monitor setup is not rectangular (for example monitors of different sizes), so saved position falls outside currently available working area
• UI: MDI Close/Minimize/Restore buttons are now HighDPI aware
• UI: MDI Tab client window buttons are now HighDPI aware
• UI: Minimized flicker during docking panes resize by disabling Windows copy bits
• UI: Toolbar split-popup buttons are now HighDPI aware
• x64 eSignal: reverted to more compatible version compiled with VC2005

CHANGES FOR VERSION 6.35.1 (as compared to 6.35.0)

• When .abb file was saved in older version and was missing Param2 then Param was incorrectly used as default value. Fixed.
• Changed threshold year for two digit year data files to 25 (previously it was 20). So YY is now interpreted as 19YY when YY < 25, otherwise it is interpreted as 20YY

CHANGES FOR VERSION 6.35.0 (as compared to 6.31.0)

• AFL: new function inverf(x) - inverse of erf function
• AFL Editor: added function navigation combo box in the toolbar - detects user defined functions and allows to quicky navigate to function definition
• AFL: GetOption("PadAndAlignToReference") allows to query Pad and align setting status (note that this is read-only field, so it will not work with SetOption)
• AFL: new function erf(x) - computes Error function https://en.wikipedia.org/wiki/Error_function
• AFL: parser warns if empty body is used in 'for' statement, like this: for( i = 0; i < 10; i++) ; // extra semicolon at the end - empty body Warning 510
• AFL: parser warns if empty body is used in 'while' statement, like this: while( condition ) ; // extra semicolon at the end - empty body Warning 510
• AFL: SafeDivide( x, y, valueifzerodiv )- safe division that handles division by zero using special handling (replace result with user-defined value)
• Batch: added optional parameter to Data Import ASCII command to allow specify format definition file
• Batch: added optional parameter to Execute and Wait command to specify current working directory for command
• Batch: added optional parameter to Export to File / Export walk-forward to file to specify column separator in CSV files
  -optional parameter defines the column SEPARATOR used for export. Only single character is used. When it is not supplied, comma is used.
• Batch: Clipboard Cut/Copy/Paste implemented in batch editor
• Batch: Edit->Delete (from main menu) and Edit-Delete All implemented for completeness
• Batch: list view uses virtual mode now (owner data)
• UI: All owner-draw list views (NOT in dialogs) now feature customizable theme (currently available "system (light) theme" and "black theme") - go to Tools->Customize, "Appearance" tab, "Dark mode for listviews" checkbox
• UI: Analysis and RT quote window use now exactly the same RGB values for up/down (green/red) colors for consistency
• UI: Custom virtual listview (owner data) supports per-item data now (SetItemData/GetItemData work with LVS_OWNERDATA)
• UI: Found workaround to avoid terrible flicker and bad rendering of list view controls during fast page up/down and side scrolls (even though they are double buffered by Windows and in theory should be smooth).
• UI: Identified even more bottlenecks in Windows OS that caused even owner data and owner draw Listview performance to suffer with large number of columns. OS code circumvented. Listview redraw speeds increased more than 5x compared to previous speedy implementation
• UI: Implemented resizing of Listview column customization dialog

CHANGES FOR VERSION 6.31.0 (as compared to 6.30.0)

• AFL: Access violation in PercentRank when period is wrong (Null/unitialized). Now error 52 is displayed instead.
• AFL: InternetPostRequest now silently (or with warning 507 under debugger) returns NULL handle instead of error when remote server responds with HTTP Status 50x
• Analysis: manual column re-sorting could be bit off if scientific output format (xxxEyyy) was used with different exponents. Fixed.
• ASCII importer now handles LastSplitRatio of X:Y where X and Y are 1...32767 (previously only 1..127)
• Batch: add "add results to watchlist" action / WatchlistAddResults
• Batch: add "clear watchlist" action / WatchlistClear
• Batch: add "comment" action
• Core/DB: fixed access violation when all data were removed while QuickData was turned on
• DebugView: eliminated some internal messages from DebugView output (from release version)
• InternetPostRequest - even if URL started with https, previous version wanted to connect to port 80, instead of 443. Fixed.
• UI/Listview: since 6.28 exception could occur if single cell text length exceeded 1024 characters. Fixed.
• When database is empty, ticker box displays <No symbol> grayed text instead of blank or reminiscent of previous database symbol

If you experience any problem with this beta version please send detailed description of the problem (especially the steps needed to reproduce it) to support at amibroker.com