I'm not sure I get the hang of testing historical data using live-feed. What happens is this: I first tested the first three months of this year 2019 via the strategy analyzer. The data for the test period was downloaded before the test ran.
Then I closed the strategy analyzer and ran a test via the chart for year-to-date 2019, but there were trades only during the first three months, ie. only for the data that was downloaded in the prior test.
Then I ran a test via the chart on a period that didn't include downloaded data, and there were trades all throughout the period.
Conclusion, as it seems, when a part but not all of the test period has downloaded data, NT performs trades only for that part that has the downloaded data. Is this correct?
I find myself continuously exporting data to see what dates were downloaded so I don't accidentally test on a 'mixed' period with part downloaded and part not. Surely it's not the way. Should I remove all the downloaded data first? Should I alternatively download everything (which I suppose would take time) before testing specific periods? What is the right approach here to not have to be vigilant about the test period?
Thank you
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