On CEX, you may not able to trade on extreme conditions. It's the same on our platform, when your order propose an extreme position change and posed risk that cannot be hedged, it will cause the system to restrict your from opening or closing orders. This mechanism is used to protect liquidity providers from extreme situations.
However, you may resume trading when the risk is hedged by the system, or you can open hedging positions on external exchanges.
Our Maintenance Margin Level is 3%, our Liquidation Margin Level is 1%, keep in mind!