A margin stop out can occur even if a trading account is partially or fully hedged, for example an account that is long 2 lots of Gold and short 2 lots of Gold at the same time. The margin stop out can occur due to several factors such as commissions, corporate actions, swaps – all fees payable even if the account is fully hedged.
Any widening of the buy/sell spread will also impact the account by decreasing the equity and can cause a margin stop out to be triggered. It is important to monitor and manage your account even when the account is fully or partially hedged.