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I have a question about my data
integrity. I have a system that buys and sells QQQ on the opening.
It's based on price and volume of QQQ and DIA. I get my EOD data from
Worden brothers and run the system in SuperCharts.
I assumed the open price on QQQ from Worden
Brothers was real. Yesterday 4-11-01 my purchase of QQQ through Brown
& Co. was at 42.20 on the opening. Worden brothers (and Yahoo's)
opening was 42.16. Brown & Co. says the opening was 42.20.
Worden brothers can't explain the difference. The AMEX website doesn't
give the opening.
I figure the problem is composite opening
price vs. AMEX opening price.
Can anyone tell me what the AMEX opening
price of QQQ was 4-11-01 ? The price difference wasn't significant
but I question the integriry of my system based on backdata obtained from Worden
Brothers.
Any comments or
suggestions?
Thanks in advance.
<FONT face=Arial
size=2><<grehert@xxxxxxxxx>>
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