XM has set the stop out level to 20% for all account types including XM Zero.
Stop out is triggered when your account equity drops below 20% of the margin needed to maintain your open positions, and all positions will be liquidated(closed).
Margin call % is 50% for all account types.
You can find the account type comparison table here.
For more information or inquiries, please contact the support team from XM’s Official Website.