Advanced - FIFOQueue Class – Alaric Securities Help Center

FIFOQueue is a class that is provided for users doing Advanced coding of paintbars. It contains most of the features that would be needed for indicator/paintbar calculation functionality.

It is mostly superseded by the StateFIFOQueue class that has exactly the same functionality but makes it more convenient to use it in the state-machine paintbars.

This is a FIFO (first in - first out) queue buffer of a set size containing double values, combined with various housekeeping and statistical functions.

You create it by calling

new FIFOQueue(size); // where size is the size of the buffer (or "period" for a lot of indicators)

for state-keeping purposes, there is a deep-copy function

publicvoid CopyTo(FIFOQueue copy) // copies contents to identically defined Buffer

It's also indexed, so if you have the code:

FIFOQueue Q = new FIFOQueue(10);

Q.Add(1);

Q.Add(2);

Q.Add(3);

then Q[1] will return 2. Q[2] will return 1.

The other useful functions/properties include

Name	Type	Purpose
Add	void	adds a value to the end of the buffer
Average	double	returns the average of the values in the buffer
Capacity	int	returns the maximum size/capacity of the buffer
Clear	void	clears out/zeroes the buffer
COG	double	returns the Center of Gravity (COG) of the values in the buffer
Count	int	returns the number of values in the buffer
DeleteFirst	void	deletes the first (oldest) value in the buffer
DeleteLast	void	deletes the last (newest) value in the buffer
First	double	returns the first (oldest) value in the buffer
Full	boolean	returns true if Count == Capacity
GetHighLow	void	(3 different overrides) returns the highest and the lowest values in the buffer
GetPercentRank	double	returns a value's percent rank when compared to all the values in the buffer
GetStDev	double	returns the Standard Deviation for the values in the buffer
Last	double	returns the last (newest) value in the buffer
MeanDev	double	returns the Mean Deviation for the values in the buffer
ReplaceLast	void	replaces the last (newest) value in the buffer with another value
Sum	double	returns the sum of all the values in the buffer
SumPos	double	returns the sum of all the positive values in the buffer
SumNeg	double	returns the sum of all the negative values in the buffer (SumNeg is always <=0)
WeightedAverage	double	returns the Weighted Average of the values in the buffer

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