The level at which the broker will start automatically closing your open positions because your account can no longer support them (due to insufficient margin). When your Margin Level falls to the stop out level (e.g., 50% margin level, depending on broker), the broker’s system will begin liquidating positions, starting from the largest loss, until the margin level is back above the threshold. This is essentially a forced stop to prevent the account from going negative (protecting both you and the broker). For example, if your robot’s trades go deeply in the red and equity drops far below required margin, at say 20% margin level the broker might close all trades at market prices (a stop out). From an EA perspective, hitting a stop out is catastrophic – it means the strategy allowed far too much drawdown. Good practice is to design risk management to never let margin level get near the stop out. Some EAs even read the margin level and will cut loss-making positions proactively at a safer threshold. It’s important to know your broker’s exact stop out level (some are 50%, some 20% or even 5%). A stop out event will close trades regardless of any EA logic, which could wreck strategy rules. Thus, avoiding stop out is paramount: use proper lot sizing, equity stop losses, or deposit additional funds if necessary to keep the margin level healthy.

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