I have migrated data from NT7 into NT8 and I have noticed that even though the individual ticks are correct, the 1 second bars are not. This can be seen both in charts and in Strategy Analyzer. I have made sure to shutdown NT8 and delete the db/cache folder to make sure it wasn't caused by previous data, and I did not connect to any data provider after restarting NT8 to make sure there was no outside influence.
I noticed that in NT8 the 1 second bars seem to be grouping the ticks differently, often into fewer 1 second bars than in NT7. So some of the bars in NT8 are missing, some of them have the wrong volume, and some of them have the wrong time stamp.
I have included screen shots that show these differences in the 1 second chart and in Print statements made while running a backtest. I have also included a display of the historical data manager that shows identical tick data. For all these screenshots, NT7 is on the left, NT8 on the right, and I am showing data on NQ 06-15 from 6:32:00 - 6:32:10 PST.
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