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Historical Data vs. Market Data


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Historical Data vs. Market Data

  #1 (permalink)
 Koepisch 
@ Germany
 
Experience: Beginner
Platform: NinjaTrader
Broker: Mirus Futures/Zen-Fire
Trading: FDAX
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Hello,

in the FDAX 2MIN Chart i see bar differences at some points. What data source is more reliable and complies more with the real data truth?

Are there perhaps any differences in the tick time second/millisecond handling (like 09:32:10.800 belongs either to bar 09:32 or 09:34)?

Thanks,
Koepisch

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  #2 (permalink)
 iantg 
charlotte nc
 
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If you are talking NinjaTrader than you certainly want to use the market replay data and run your simulation through the market replay tool.

Further if you want the most accurate view of what really happened at a specific point in time then the best and only version of the truth to use is the bid and ask price level information from the level 1 data feed.

Ian



Koepisch View Post
Hello,

in the FDAX 2MIN Chart i see bar differences at some points. What data source is more reliable and complies more with the real data truth?

Are there perhaps any differences in the tick time second/millisecond handling (like 09:32:10.800 belongs either to bar 09:32 or 09:34)?

Thanks,
Koepisch


In the analytical world there is no such thing as art, there is only the science you know and the science you don't know. Characterizing the science you don't know as "art" is a fools game.
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  #3 (permalink)
 Koepisch 
@ Germany
 
Experience: Beginner
Platform: NinjaTrader
Broker: Mirus Futures/Zen-Fire
Trading: FDAX
Posts: 569 since Nov 2011
Thanks Given: 440
Thanks Received: 518


Thanks, Ian.

I want to identify the reasons for that differences. I think the data are coming from the same data source at ninjatrader but in different formats (differences in tick time granularity). At minute bars, there shouldn't be such obvious differences.

Perhaps someone has already done some research.


iantg View Post
If you are talking NinjaTrader than you certainly want to use the market replay data and run your simulation through the market replay tool.

Further if you want the most accurate view of what really happened at a specific point in time then the best and only version of the truth to use is the bid and ask price level information from the level 1 data feed.

Ian


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  #4 (permalink)
 
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 Fat Tails 
Berlin, Europe
Market Wizard
 
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Koepisch View Post
Hello,

in the FDAX 2MIN Chart i see bar differences at some points. What data source is more reliable and complies more with the real data truth?

Are there perhaps any differences in the tick time second/millisecond handling (like 09:32:10.800 belongs either to bar 09:32 or 09:34)?

Thanks,
Koepisch


Who is your data provider?

How did you detect those differences?

Could you please post a screenshot showing the differences?

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