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[amibroker] Graham: Point & Figure Chart



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Hi Graham et al,

As a programmer in a different language, who's a new AmiBroker user, 
I would be thankful if you provide some commentary (here), with 
regards to variables/declarations in the P&F code published by you.
This way, I hope I'll be able to learn AFL better. Would you mind if 
I ask several questions?

(i) what do PFO and PFC arrays represent?
(ii) what does delta variable represent?
(iii) what is Jscript and why is it being used?
(iv) In the "Plot" function, why is C array used for plotting? As 
far as I understand (I guess I don't, currently) C stands for the 
closing prices of "regular" time-interval bars (daily/weekly/monthly 
etc), not P&F columns (which are time independent). I would be happy 
if you can clarify a little.
(v) Last question, if you won't mind: is there any way to construct 
a type/record in AmiBroker?  i.e, a single varibale that contains 
several sub-variables. I specifically refer to something like this:

Type Column=record
// Storing information for every 'X' or 'O' column
// Assuming a maximum of 200 boxes per column
  Sort: integer; // 'X' ---> 1 ; 'O' ---> 0
  MaxPFValue: float; // Highest price for the column (P&F 
perspective)
  MinPFValue: float; // Lowest price for the column (P&F perspective)
  First: integer; // Starting date for the whole column
  Last: integer; // Ending date for the whole column
end;


As a programmer that is (still) unfamiliar with the synthax of AFL, 
I take this opportunity to thank you in advance for any assistance. 

Short. 
 








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