Set-up
I use NT7 (7.0.1000.39) with a SimulationOnly licence. Datafeed is from IB. ES futures are traded over IB BookTrader (IB DOM).
If nothing is traded (and no orders are entered) than everything works fine. The charts are displayed correctly etc.
The systems works since several months without any problem. No updates were made. Latest Update on IB TWS was 10 days ago.
Since yesterday (23.04.2019) a bothering issue appears.
Problem
As soon as I enter any order on the IB BookTrader then ES is not displayed any more on the charts (resp. not correctly)
Only the price for the last order are displayed.
It seems that by entering an order on IB BookTrader the data of the instrument are changing (after examining the instrument manager).
The tick size is suddenly equal to the limit price (instead of 0.25), the exchange does change and other instrument data are changing as well.
By resetting the instrument in NT, the system returns to the correct state. But with every order, the instrument data are changed again and the charts are not displayed anymore correctly.
IB Support investigated the logfiles (for IB API). They were supportive. They think that the data stream is during the entire process correct and not interrupted. Therefore, the issue seems to be with NT, since the data specification changes there.
Has anybody an idea what might cause this issue?
(I already made the majority of the obvious things like, deleting db/caches, restarting all programs etc.)
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