I have amibroker 5.5 when I have Intraday data for suppose NCC script. from 20.3.2015 to 25.3.2015. Now when I backfill the data from external data feeder software (RT) to amibroker from 26.3.2015 to 30.3.2015 . It dont update it , it replace new data from old data. So data from 20 to 25march had been lost. What to do to keep both data in single database or it updates new data without deleting old data?
I may be way off here...but seeing that so far there is no solution, some thoughts.
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1.
If your external data feeder software is the problem then, try some other feeder than the one causing all this headache.
If your terminal is NOW/NEST try
http://www.traderji.com/intraday/97637-real-time-data-now-nest-trader-amibroker-fcharts.html
Also see other threads by Josh1 for data feed from other terminals.
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2.
If you have spent some time (weeks/months) with Amibroker (any version, any pc) working ok then probably the problem is not some silly mistake.
If however you are totally new to Amibroker and want to rule out some silly mistake as a possible cause then post screen shots of every step (even minor step) in your Amibroker usage. Also post settings, paths, format file(s) used, chart afl, sample data being imported, sample data already in db being overwritten.
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Start with a reboot and close all unnecessary programs that are auto started. Delete "broker.master" from your db and then start Amibroker.