Thanks for your previous help, that worked a treat
I'm having real problems with MT4 history files - have been for a few days now, trying different things :-/
I got tick data for GBPNZD, converted it to 1 minute bars, imported it into the history (cancelled through the account login) - this created a GBPNZD1.hst file that was fine.
Then I opened the chart and applied the Period_Convertor_Opt, ensuring DLL imports was checked (as per comments in the indicator) and set the period multiplier to 60.
That created a csv file that looks fine, nice 1 hr bar data from start to end (checked in excel.
Unfortunately it also overwrote the 1 min chart that was currently showing (up until the last hour) with hour bars - I'm guessing it didn't do the last 1 hr bar because it only went to 21:57 on Feb 28 2014, hence not a full hour.
What I mean by that is that the chart basically had 1 hr bars up until the last 57 minutes, then they were 1 minute bars!
So I did it all again and kept a copy of the GBPNZD1hst this time.
So, I have the nice GBPNZD60 csv file and import that into MT4 (selecting the 1hr timeframe) - however, upon restarting MT4 and trying to open offline there is only the GBPNZD1.hst showing (and of course this is the now corrupted 1 minute hst file), even though I imported the 1 hr csv using the 1 hr timeframe.
This is driving me nuts - either I'm doing something wrong or MT4 is seriously messed up :-/
Any ideas as to what might be causing the problem, please?