EA not working consistently with MetaTrader VPS

 
I recently signed up for the VPS service from MetaTrader which appears to work very well. However, yesterday I ran two EA's on EURUSD on separate charts and only one of them produced an order.  When I look manually at the charts they should both have created orders.  The same EA (that didn't produce an order) is used by my son, also on a VPS, and his order went in as normal.  Can anyone think of a reason for mine not working.  It worked fine the day before.  Is it possible for the server to have a momentary loss of network connectivity or other technical issue ?  The journal on the VPS doesn't shed any light.  The signal to create an order simply wasn't there.
 
I think it was because I was also trading cryptos.  I didn't realise that the margin was only 1:2 on European accounts - good (and expensive) learning.  So there was insufficient margin left on my account.  It would be good to be able to see an error relating to that somewhere. I couldn't see anything in the journals. 
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