Bar opening and closing prices changing in history

[Mike_32]

I have noticed bars in history with ZenFire feed move after you close and restart NT.
Earlier on about 10 hours ago I noted down some signals an indicator gave at open of bar and close.
These bars had long since closed.
I noted what price they opened and closed etc.
Now I turn NT back on, and I go to these points, only to see the opening and closing prices of these bars have changed.
One of them by 14 points.
How can this be?If bar opens at 8225 and closes at 8201.
How can this information be changed?
This to me shows manipulation of data.

[NinjaTrader_Jason]

Zen-Fire itself does not support historical data. We provide Zen-Fire customers with hiostorical data from our historical data server.

When you displayed the data the first time, you were looking at collected real-time data by Zen-Fire. Once you restarted NinjaTrader and opened a new chart, the data was loaded from the historical data server.

Unfortunately different data feeds can have discrepancies. Please see the following link for more information.

http://www.ninjatrader-support.com/HelpGuideV6/HowDoesNinjaTraderBuildChartBars.html

[Mike_32]

Ok thanks that explains it.

[Mike_32]

Question.
ZenFire supports historical tick data right?
Is that the real live tick data, or the NT bogus historical data?

If I click disable historical data on my connection settings.
Then there is no historical tick data.
I have to wait till it comes and stores it.
Because I don't want that false data that is totally different to the ZenFire live data and should not be used to trade from.
Im referring to whats written here.

http://www.ninjatrader-support.com/HelpGuideV6/helpguide.html?HistoricalData

ZenFire dont have Historical data, NT gives it and its different to ZenFire.

[NinjaTrader_Jason]

Yes, you can disable the historical data for the Zen-Fire, so you will only collect real-time data and will not load historical data.

Make sure you have "Store real-time bar data" enabled under Tools-->Options-->Data-tab when you receive real-time data.

[Mike_32]

Do you know anywhere I could buy like 2 years of real saved ZenFire data?
Because even E-signal is not the same as ZenFire price feed.
ZenFire is raw exchange data.
Surely someone must have saved it and is selling it.

[NinjaTrader_Jason]

Unfortunately I am not familiar with a source that sells real-time saved Zen-Fire data.