Margin call level is the margin level at which you are in danger of having some of your positions forcibly closed (or "liquidated"). If this happens, your positions will be closed in the order they were created, first to last. The number of positions closed is at our discretion - we may close all your positions or only enough to get your margin level above 100%. This is done to increase the chances that you can repay the funds you have borrowed using the value of your positions and account balance. The margin call level can vary depending on the volatility of the currency pair, but to give a rough estimate it might be around 80%. The exact levels for each currency pair are listed under Fees and Pair Info (in the "Help" section). At this level, liquidation is discretionary, but at a lower margin level liquidation is automatic. See "Margin Liquidation Level" for more information.