I load historic data from csv files and I also connect via data feeds. It seems to me, that if I open a chart while connected over a feed, the historic data series gets overwritten or extended, and it stays that way (bad). Is that the default behaviour, i.e. does data from data feeds overwrite/extend the historic, manually loaded data?
If that's the case, is there a way I can freeze my historic data - basically disabling data feeds from overwriting it?
Thanks
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