I think FSB replaces everytime the previously imported data (I made one file for every year for better performance). Should the tickdata (from Dukascopy) be stored in one file?
If yes, wouldn't it be better to store in different files?

Can s.o. tell me how to store and handle the tickdata for better performace?

I noted that sometimes to scan intrabar for tickdata for one month takes only about one minute but for another month it takes about an hour (same strategy, settings and tf). Do I something wrong? Or is the tickdata "a bit damaged" in some places?