Risk of ruin rises sharply with per-trade risk. At 1% per trade a normal ten-loss streak costs about a tenth of the account; at 3% it costs nearly a third. The maths stops being recoverable.
Keeping per-trade risk small (often 0.5–2%) is the simplest way to keep risk of ruin, and prop-firm breaches, low.
See it on your own trades.
Merlin computes the metrics and rule distances above from your imported history, and checks your next trade against them before you enter.
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Firm figures reflect published rules at the time of writing. Firms revise rules often, so verify against the firm's site before relying on them.
Merlin's gauges derive from closed trades. Your firm watches live equity including open positions.
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