If I import 2 files of the same name, will it remove and replace the data of the original file with the new file, or will it simply append the data of the new file into the database?
For example, I downloaded YM 06-12 from TickWrite in March last year, and the file was about 20MB (due to it being only March, and the June contract was very sparsely traded at that time). I imported this into NinjaTrader.
When I download YM 06-12 last week, the file was 144MB. If I were to import the new file, what happens to the data I previously imported? Does NT completely trash the earlier data, and does a fresh import with the new file? Or will old data remain, and I end up with duplicate data? Or is NT smart enough to "fill in the blanks" with the new data, while leaving old/duplicate lines untouched?
Thanks.
-Nick
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