Looking back Starfire's trade last month on June, with a result of an analysis of the FT I've done, I found the cause of huge DD happened on early morning(or, late evening in NY session) in Japan of 16th June and of some consequence bad falls afterwards till some 21th of June.
The main cause was in trading hours on EURUSD currency pair.
By default, StarFire EA works between 22:00 and 02:00 (04:00 - 08:00 in Japan time) on any currency, but with a FT, some currencies that also include currencies pairs not listed here, have poor result in opening trade between 22:00 and 23:00.
The main reason to this might be 'Trend' which StarFire EA can not handle well at most cases.
Once the trend happens, the EA makes new positions one after another all at once that may result in fatal DD sometime, on the other hand when the market is quiet and calm enough, the EA works extremely fine.
To gain more accurate resolution to this cause, I also checked some other brokers that run StarFire EA with inferior situation(Wider spreads with poor execution), and also found that the result ended in similar cases.
So, according to the 1 month FT, most suitable trading time is from 00:00 and 02:00, server time of FXClearing. - Please adjust the accurate trading hours depending on your trading server and brokers.
I also know trading hours of 23:00 - 00:00 has almost no problems.
Besides, as for USDJPY pair, there are no matters found on trading hours up to now, so the default time setting is, as ever, recommended for trading.
Well, I'm gonna do this FT with trading hours of 22:00 -23:00 on EURUSD to see my insight is correct and wanna compare the differences among them.