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Hello,
1. Combining into one file speeds only IMPORT by about
10-15%.
Unfortunatelly the download time is cruicial factor, and
historical downloads
can not be speeded up in the way current are because Yahoo
does not handle
multiple symbols in one request for historical
downloads.
2. "Current" mode downloads snapshot quotes delayed 15/20
minutes.
These quotes are available constantly during the
trading session.
"Intraday" mode is for downloading HISTORICAL INTRADAY BARS
(1-minute bars for example)
Best regards,Tomasz
Janeczkoamibroker.com
<BLOCKQUOTE
>
----- Original Message -----
<DIV
>From:
<A title=520001085531-0001@xxxx
href="">520001085531-0001@xxxxxx
To: <A title=amibroker@xxxxxxxxxx
href="">amibroker@xxxxxxxxxxxxxxx
Sent: Sunday, July 28, 2002 2:20 AM
Subject: Re: [amibroker] Re: A new
Low-cost eSignal subscription available
<FONT
size=2>
Hi Tomasz,
> It was discussed several times already on this
list.> Current mode of AmiQuote works like nickhere described>
it is upto 200 times faster than historical download because> Yahoo
allows to download upto 200 symbols in one request in "Current" mode.>
> There is NO WAY to do the same with historical quotes> as
Yahoo accepts only ONE symbol per request in historical mode.
<FONT
size=2>to speed up also the historic data, I would
suggest to add an option in AQ
to write all data into ONE file. <FONT
face=Arial>Then importing this one file manually
in AB via
ImportASCII will be very fast; I have tested
this with AQH files by converting
them to a format which looked like
this:
TICKER,YYYY/MM/DD,O,H,L,C,V
and put all data into one file, then imported via
ImportASCII directly into AB (ie. not
via AQ). Of course
one has to use an appropriate format file. Mine looks like
this:
File: MyFormat.format
# Format definition file
# $FORMAT Ticker, Date_YMD, Open, High, Low, Close,
Volume, Skip$SKIPLINES 0$SEPARATOR ,$AUTOADD 1$DEBUG
1$BREAKONERR 0$CONT 1$MARKET 254
And, by "Current Day" I
think it is meant "Current (delayed) quotes". That is: using them
for EOD would require that one gets them atleast
20 min after market close. Is this right?
What is then the difference between "Current Day"and
"Intraday" in AQ? (sorry I'm a newbie in AB)
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