RE: [amibroker] Ticker Symbol Length Issues, AmiBroker Email List Archive

Dan,

Not sure if this will be of help but the best work around I have found is to use a 4 letter sector/industry root symbol. For example I have:

*AUTO1

*AUTO2

*AUTO3 etc

AERO1 = Aerospace Sector

AERO2 = Aerospace-Defense

AERO3 = Aerospace-Defense Eqp

The number “ 1 ” as in AUTO1 is always a sector. Since you have the numeric there is no risk of duplicating a real symbol. This also makes it easy to code ATC’s for indicators like Advance/Decline lines etc. for each group/sector because you know the symbols will be consecutive. I have 25 Sectors and over 200 industry groups so I needed to find something to reduce the work and operate under my limited code restrained brain functions. J

If you find another work around let us know.

Regards,

Duke Jones, CMT

From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of Dan Clark
Sent: Sunday, August 14, 2005 1:12 AM
To: amibroker@xxxxxxxxxxxxxxx
Subject: [amibroker] Ticker Symbol Length Issues

Hi,

I’ve discovered the joys of Composite symbols. However…

I ran into what appears to be a serious issue when creating Composite symbols – ticker symbol length. It appears that the maximum length for a ticker symbol is 25 characters.

When creating Composite symbols, you append or prepend a character string to differentiate types of Composite symbols. If the first 25 characters of a Composite symbol are exactly the same, the excess characters are truncated and values are merged to one symbol. The symbol is then corrupt.

For example, I create QP Industry Composite indexes of my stock list, and then create an “Indicator” Composite symbol of each Industry Index symbol. Here’s how the error occurs:

· QP has two Industries:

Aerospace-Defense

Aerospace-Defense Eqp

· Composite Industry indexes are created by prepending “~iInd_” to the industry name:

~iInd_Aerospace-Defense

~iInd_Aerospace-Defense E

Notice that “qp” is truncated from the second industry.

· Then Composite Indicator symbols are created by prepending “Rk” to the Industry Index symbols:

“Rk~iInd_Aerospace-Defense”

However, instead of two Composite Indicator symbols, only ONE is created! Since the left 25 characters of the Indicator Composite symbol (“Rk” + Industry Index symbol name) are same for both Industries, values from the two Industry Index symbols are merged to one Indicator Symbol!

Composite Indexes and Indicator symbols are a HUGE benefit. Composite Indicator symbols allow me to preprocess and save Indicators like RSI, and then use them like a normal ticker. Before, my scans and charts computed Sector and Industry Rank on the fly, which was SLOW! Now, with Sector and Industry Composite Rank symbols, scans and charts are at least 3 times faster!

How can I get around this character length limitation? Tweaking symbol names might work for a while, but at some point the symbol names will become meaningless. Can I increase the Symbol length? Tomasz, can you increase Symbol length?

Thanks and regards,

Dan.

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