AFL Function Reference - Categorized list of functions

Basic price pattern detection

• GAPDOWN - gap down
• GAPUP - gap up
• INSIDE - inside day
• OUTSIDE - outside bar
• PEAK - peak (AFL 1.1)
• PEAKBARS - bars since peak (AFL 1.1)
• TROUGH - trough (AFL 1.1)
• TROUGHBARS - bars since trough (AFL 1.1)
• ZIG - zig-zag indicator (AFL 1.1)

Composites

• AddToComposite - add value to composite ticker (AFL 2.0)
• ADLine - advance/decline line (AFL 1.2)
• AdvIssues - advancing issues (AFL 1.2)
• AdvVolume - advancing issues volume (AFL 1.2)
• DECISSUES - declining issues (AFL 1.2)
• DECVOLUME - declining issues volume (AFL 1.2)
• TRIN - traders (Arms) index (AFL 1.2)
• UNCISSUES - unchanged issues (AFL 1.2)
• UNCVOLUME - unchaged issues volume (AFL 1.2)

Date/Time

• BarIndex - get zero-based bar number (AFL 2.3)
• BeginValue - Value of the array at the begin of the range (AFL 2.3)
• DATE - date (AFL 1.1)
• DATENUM - date number (AFL 1.4)
• DATETIME - retrieves encoded date time (AFL 2.3)
• DAY - day of month (AFL 1.4)
• DAYOFWEEK - day of week (AFL 1.4)
• DAYOFYEAR - get ordinal number of day in a year (AFL 2.4)
• ENDVALUE - value of the array at the begin of the selected range (AFL 2.3)
• HOUR - get current bar's hour (AFL 2.0)
• INTERVAL - get bar interval (in seconds) (AFL 2.1)
• MINUTE - get current bar's minute (AFL 2.0)
• MONTH - month (AFL 1.4)
• NOW - gets current system date/time (AFL 2.3)
• SECOND - get current bar's second (AFL 2.0)
• TIMENUM - get current bar time (AFL 2.0)
• YEAR - year (AFL 1.4)

Indicators

• AccDist - accumulation/distribution
• ADX - average directional movement index (AFL 1.3)
• ATR - average true range (AFL 1.3)
• BBandBot - bottom bollinger band
• BBandTop - top bollinger band
• CCI - commodity channel index
• CHAIKIN - chaikin oscillator
• MACD - moving average convergence/divergence
• MDI - minus directional movement indicator (-DI) (AFL 1.3)
• MFI - money flow index
• NVI - negative volume index
• OBV - on balance volume
• OSCP - price oscillator
• OSCV - volume oscillator
• PDI - plus directional movement indicator (AFL 1.3)
• PVI - positive volume index
• RMI - Relative Momentum Index (AFL 2.1)
• ROC - percentage rate of change
• RSI - relative strength index
• RWI - random walk index
• RWIHI - random walk index of highs
• RWILO - random walk index of lows
• SAR - parabolic stop-and-reverse (AFL 1.3)
• SIGNAL - macd signal line
• STOCHD - stochastic slow %D
• STOCHK - stochastic slow %K
• TRIX - triple exponential smoothed price
• ULTIMATE - ultimate oscillator

Information / Categories

• CategoryAddSymbol - adds a symbol to a category (AFL 2.5)
• CategoryGetName - get the name of a category (AFL 2.5)
• CategoryGetSymbols - retrieves comma-separated list of symbols belonging to given category (AFL 2.5)
• CategoryRemoveSymbol - remove a symbol from a category (AFL 2.5)
• FullName - full name of the symbol (AFL 1.1)
• GetCategorySymbols - retrieves comma-separated list of symbols belonging to given category (AFL 2.4)
• GetDatabaseName - retrieves folder name of current database (AFL 2.3)
• GROUPID - get group ID/name (AFL 1.8)
• INDUSTRYID - get industry ID / name (AFL 1.8)
• INWATCHLIST - watch list membership test
• IsFavorite - check if current symbol belongs to favorites (AFL 2.5)
• IsIndex - check if current symbol is an index (AFL 2.5)
• MARKETID - market ID / name (AFL 1.8)
• NAME - ticker symbol (AFL 1.1)
• SECTORID - get sector ID / name (AFL 1.8)

Lowest/Highest

• HHV - highest high value
• HHVBARS - bars since highest high
• HIGHEST - highest value
• HIGHESTBARS - bars since highest value
• HIGHESTSINCE - highest value since condition met (AFL 1.4)
• HIGHESTSINCEBARS - bars since highest value since condition met (AFL 1.4)
• LLV - lowest low value
• LLVBARS - bars since lowest low
• LOWEST - lowest value
• LOWESTBARS - bars since lowest
• LOWESTSINCE - lowest value since condition met (AFL 1.4)
• LOWESTSINCEBARS - barssince lowest value since condition met (AFL 1.4)

Math functions

• abs - absolute value
• atan - arc tan
• CEIL - ceil value
• COS - cosine
• EXP - exponential function
• FLOOR - floor value
• FRAC - fractional part
• INT - integer part
• LOG - natural logarithm
• LOG10 - decimal logarithm
• MAX - maximum value of two numbers / arrays
• MIN - minimum value of two numbers / arrays
• PREC - adjust number of decimal points of floating point number
• ROUND - round number to nearest integer
• SIN - sine function
• SQRT - square root

Miscellaneous functions

• #include - preprocessor include command (AFL 2.2)
• #pragma - sets AFL pre-processor option (AFL 2.4)
• CREATEOBJECT - create COM object (AFL 1.8)
• CREATESTATICOBJECT - create static COM object (AFL 1.8)
• ENABLESCRIPT - enable scripting engine
• ENABLETEXTOUTPUT - enables/disables text output in the Chart Commentary window (AFL 2.2)
• GETEXTRADATA - get extra data from external data source (AFL 1.9)
• GETSCRIPTOBJECT - get access to script COM object (AFL 1.8)
• ISEMPTY - empty value check (AFL 1.5)
• ISFINITE - check if value is not infinite (AFL 2.3)
• ISNAN - checks for NaN (not a number) (AFL 2.3)
• ISNULL - check for Null (empty) value (AFL 2.3)
• ISTRUE - true value (non-empty and non-zero) check (AFL 1.5)
• NZ - Null (Null/Nan/Infinity) to zero (AFL 2.3)
• PREFS - retrieve preferences settings (AFL 1.4)
• SETBARSREQUIRED - set number of previous and future bars needed for script/DLL to properly execute (AFL 2.1)
• STATUS - get run-time AFL status information (AFL 1.65)
• STUDY - reference hand-drawn study (AFL 1.5)
• VERSION - get version info (AFL 1.9)
• _TRACE - print text to system debug viewer (AFL 2.4)

Moving averages, summation

• AMA - adaptive moving average (AFL 1.5)
• AMA2 - adaptive moving average (AFL 1.5)
• CUM - cumulative sum
• DEMA - double exponential moving average (AFL 2.0)
• EMA - exponential moving average
• MA - simple moving average
• SUM - sum data over specified number of bars
• TEMA - triple exponential moving average (AFL 2.0)
• WILDERS - Wilder's smoothing (AFL 1.4)
• WMA - weighted moving average (AFL 2.0)

Statistical functions

• CORRELATION - correlation (AFL 1.4)
• LINEARREG - linear regression end-point (AFL 2.2)
• LINREGINTERCEPT - (AFL 2.2)
• LINREGSLOPE - linear regression slope (AFL 1.4)
• Median - calculate median (middle element) (AFL 2.5)
• Percentile - calculate percentile (AFL 2.5)
• RANDOM - random number (AFL 1.9)
• STDERR - standard error (AFL 1.4)
• STDEV - standard deviation (AFL 1.4)
• TSF - time series forecast (AFL 2.2)

String manipulation

• NumToStr - convert number to string (AFL 2.5)
• printf - Print formatted output to the output window. (AFL 2.5)
• StrExtract - extracts given item (substring) from comma-separated string (AFL 2.4)
• StrFind - find substring in a string (AFL 2.5)
• StrFormat - Write formatted output to the string (AFL 2.5)
• StrLeft - extracts the leftmost part (AFL 2.0)
• StrLen - string length (AFL 1.5)
• StrMid - extracts part of the string (AFL 2.0)
• StrRight - extracts the rightmost part of the string (AFL 2.0)
• StrToNum - convert string to number (AFL 2.5)

Trading system toolbox

• AlertIf - trigger alerts (AFL 2.1)
• ApplyStop - apply built-in stop (AFL 1.7)
• BarsSince - bars since
• CROSS - crossover check
• EnableRotationalTrading - Turns on rotational-trading mode of the backtester (AFL 2.5)
• EQUITY - calculate equity line (AFL 2.0)
• EXREM - remove excessive signals (AFL 1.5)
• EXREMSPAN - remove excessive signals spanning given number of bars (AFL 2.0)
• FLIP - (AFL 1.5)
• HOLD - hold the alert signal
• IIF - immediate IF function
• LASTVALUE - last value of the array
• OPTIMIZE - define optimization variable (AFL 1.7)
• REF - reference past/future values of the array
• SetFormulaName - set the name of the formula (AFL 2.5)
• SetOption - sets options in automatic analysis settings (AFL 2.3)
• SETTRADEDELAYS - allows to control trade delays applied by the backtester (AFL 2.1)
• VALUEWHEN - get value of the array when condition met (AFL 1.1)

Exploration /Indicator Builder

• AddColumn - add numeric exploration column (AFL 1.8)
• AddTextColumn - add text exploration column (AFL 1.8)
• ENCODECOLOR - encodes color for indicator title (AFL 2.2)
• GETCHARTID - get current chart ID (AFL 2.3)
• LineArray - generate trend-line array (AFL 2.5)
• PARAM - add user user-definable numeric parameter (AFL 2.3)
• PARAMCOLOR - add user user-definable color parameter (AFL 2.3)
• PARAMSTR - add user user-definable string parameter (AFL 2.3)
• PLOT - plot indicator graph (AFL 1.8)
• PLOTGRID - Plot horizontal grid line (AFL 2.3)
• PLOTOHLC - plot custom OHLC chart (AFL 2.2)
• PLOTSHAPES - plots arrows and other shapes (AFL 2.3)
• PLOTVAPOVERLAY - plot Volume-At-Price overlay chart (AFL 2.4)
• SELECTEDVALUE - retrieves value of the array at currently selected date/time point (AFL 2.1)
• WRITEIF - commentary conditional text output
• WriteVal - write number or value of the array
• _N - no text output (AFL 2.1)

File Input/Output functions

• fclose - close a file (AFL 2.5)
• feof - test for end-of-file (AFL 2.5)
• fgets - get a string from a file (AFL 2.5)
• fopen - open a file (AFL 2.5)
• fputs - write a string to a file (AFL 2.5)

Referencing other symbol data

• FOREIGN - access foreign security data (AFL 1.5)
• GETBASEINDEX - retrieves symbol of relative strength base index (AFL 2.1)
• PLOTFOREIGN - plot foreign security data (AFL 2.2)
• RELSTRENGTH - comparative relative strength (AFL 1.3)
• RestorePriceArrays - restore price arrays to original symbol (AFL 2.5)
• SetForeign - replace current price arrays with those of foreign security (AFL 2.5)

Time Frame functions

• TimeFrameCompress - compress single array to given time frame (AFL 2.5)
• TimeFrameExpand - expand time frame compressed array (AFL 2.5)
• TimeFrameGetPrice - retrieve O, H, L, C, V values from other time frame (AFL 2.5)
• TimeFrameRestore - restores price arrays to original time frame (AFL 2.5)
• TimeFrameSet - switch price arrays to a different time frame (AFL 2.5)