The Margin Call is set at 110%, and the Stop Out is at 100%.
A Margin Call means your account is very close to the limit, and you cannot open new trades until you free up more margin.
A Stop Out means you have used all available margin. At this point, all open trades are closed automatically, regardless of their profit or loss.
When this happens, a permanent breach of the trading account occurs — regardless of its balance or equity.
Traders should always monitor their trade sizes and margin usage to avoid reaching these limits.