What is liquidation?
When a trader holds position and price moves towards the direction which increases the loss of the position, at some certain price level, the position will be liquidated.
When you open a position, on the right-hand side of the trading page, " est. liquidation price" shows an estimation of your liquidation price of the position.
Maintenance margin= Σ position* open price *MMR, when account net value <=maintenance margin, liquidation will be proceeded. There is the MMR setting for each trading pair,