To be honest, the less trades you have, the safer you are. If you open more trades simultaneously and if your account leverage is very small and your equity and margin keeps dropping, you are very much getting closer and closer to getting your account blown. Another thing is about using an EA, bear in mind that some EA do work well by opening lots of trades, those are mainly using some kind of martingale strategies. If you are using those EA, then you need to either have a very large account balance, or you would need to use a CENT account for your smaller balance that is normally less than $1000 or so. It all depends on what kind of EA you use and what are the requirements and conditions. Please read your EA instructions manual carefully for all the important info about your EA. Never go lazy without studying hard and knowing exactly what you are doing the risks involved. Failure to do so will surely get your account blown in no time.
Wish you all the best, be safe and stay safe as always. Again, the more trades are opened, the more risks you are exposed to. Simple as that.