[amibroker] Sequence of execution in Explorer and Scan...

["jtelang" <jtelang@xxxxxxxxx>]

I need to store some calculations for each ticker for each day so 
that I can use them in backtester without having to go through a 
custom formula. The calculations are lengthy, so I can't afford to do 
it as a formula. Given this criteria, I thought I'd do the following 
using ABTool -

1. Run an exploration or a scan once that does nothing but creates a 
table file for each day.
2. Run another exploration or a scan that calculates the values for 
all tickers and store them in the respective table for the day.
3. Grab the value for the respective ticker from the respective table 
files in backtest.

(As a side note, if anyone knows a better way other than using 
Composites, please suggest.)

So here's a little piece of code that I tried to implement step 1, to 
create the tables -

-------

xxABtoolInit();

tableNum = xxTableCreate();
xxTableColumnAdd("Ticker", 3, tableNum, 64, 0);
xxTableColumnAdd("Close", 1, tableNum, 64, 0);

// Following returns me a unique filename based on "current" DateNum()
tableFile = jDailyUniqueFilename("XX_", ".dat");
xxTableExportBinary(tableFile, tableNum);

--------

When I run this on a single stock for say last 5 bars, what I see is 
that only one file is created, and that too with the date for last 
bar in my dataset.

So that's making me wonder about the sequence of how a scan or 
explore works. I was thinking that since I'm selecting only "current 
stock", it'd go through this code for last 5 days, and hence my code 
that uses DateNum() to generate filename would create appropriate 
file for each day, and I'd have 5 empty table files as desired. Is 
that not what should happen? I'm baffled that I get only one file in 
the end, with only the last dated file.

Jitu

PS: I'm fairly positive that my function returns a unique name based 
on current value returned by DateNum(). I verified this by replacing 
the above mentioned call by a simple DateNum() call.



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