TrioMarkets does support NBP(Negative Balance Protection), but only up to $50.

In case of exceeded loss which is more than $50, then the trader will need to cover the loss for the amount.

In order to avoid such worse case scenario for both traders and the broker, TrioMarkets sets margin call % to 200% and stop out % to 30% or 20%.

Margin Call % is where the trader gets alerted for low margin and the Stop Out % is where all open positions will be liquidated(closed forcefully) to avoid further losses.