It took me a while to find out why the Data Export script for MT4 would only export my D1 data from 2007 until I found this in the code:

    if (period == PERIOD_D1)
    {
       datetime from = D'2007.01.01 00:00';
       datetime to   = TimeCurrent();
       bars = CopyRates(symbol, period, from, to, rates);
    }

Why do you limit the export for D1 from 2007 only? My D1 data goes back to 1986. I have changed it to "1986.01.01" and that works just fine, but what am I missing, is there any technical issue with D1 data prior to 2007 with EA Studio so that it cannot handle it correctly?

Thank you :-)