Mr. Wolanchuk

This question comes to you because of a comment you made to OEXCHAOS concerning an attack on transparency.

Does data integrity have anything to do with this attack on transparency as you see it? "Yes" or "No", can you comment on the following three observations?

1. Pertaining to the below post from SilentOne, TradeStation data says we already tested that TL which John show's in his chart. John's data says we aren't quite there yet. Again, mine says we are.

2. Recently I solicited OGM and NAV about a data discrepancy between Stockcharts and TradeStation reference ticker TLT. The discrepancy is shocking. You can see it from accross the room when the two sources are compared. Neither of them have commented though I'm almost certain they use both data sources.

3. Most recently I have noticed another glaring discrepancy between Stockcharts and TradeStation reference the 10/10 low for INDU. There is a (get this) ..... 111.11 difference between the two data sources. That makes a Big difference when you draw a TL from October low to November low on the Dow.

I'm sure with your experience this is borish old news to you. But I can't help but wonder what other discrepancies there are out there and if Da Boyz are using their own synchronized set of data especially in times like these.

Your response would be greatly appreciated.

zz

FWIW - We did a study on this a number of years back and found that the actual time data may vary among data vendors. This is based both on the programmer and the manner of how rollup is calculated. For example: During fast markets some programmer throw out ticks (data) in order to allow the program to keep up with the data stream. Secondly, a time stamp is not transmitted by the exchange. Consequently, this stamp is put on locally. Hence a variance in local computer time will effect the cutoff for rollup, (Tick to minute, minute to n minutes, etc.) and impact any given bar high or low point (value) shown.

Edited by dw85745, 05 March 2009 - 07:38 AM.

dw .......thats about a good an answer as there is....thanks

FWIW -

We did a study on this a number of years back and found that the actual time data may vary among data vendors. This is based both on the programmer and the manner of how rollup is calculated.

For example: During fast markets some programmer throw out ticks (data) in order to allow the program to keep up with the data stream. Secondly, a time stamp is not transmitted by the exchange. Consequently, this stamp is put on locally. Hence a variance in local computer time will effect the cutoff for rollup, (Tick to minute, minute to n minutes, etc.) and impact any given bar high or low point (value) shown.

Thanks for your response. I appreciate it.

dw .......thats about a good an answer as there is....thanks

ahhh. I stumped ya eh?

To take your question a step further: Fair to some may not be fair to all. For example some of the major firms pay the exchange to have their server colocated next to the exchange server. This way they not only get the data faster but less chance for any possible corruption. Obviously, not everyone has the ability (money or connections) to do this. Do they get an advantage? Recently there was another case of market makers front runner customer orders. CFTC finally caught them. Bottom line, when money involved someones going to try and gain an advantage for their benefit. Whether CFTC, SEC or whoever can effectively can stop it is a big ???? Bottom line, put your money down and take your chances. The best ripoff is the one that's never known.

Edited by dw85745, 05 March 2009 - 10:44 AM.

dw .......thats about a good an answer as there is....thanks

ahhh. I stumped ya eh?

im flattered that you think i know everything.

Bottom line, put your money down and take your chances.

The best ripoff is the one that's never known.

I agree with that part. The rest is new to me. Thanks for the education.

dw .......thats about a good an answer as there is....thanks

ahhh. I stumped ya eh?

im flattered that you think i know everything.

Not everything, but a far cry more than I do. I think it's funny some folks here think your a one way trader without even seeing your books. something tells me I wouldn't want to play poker against you for big stakes.

Edited by zigzag, 05 March 2009 - 11:15 AM.