Definition
Martingale
Doubling position size after losses to recover — treated as gambling and banned or restricted by many firms.
Martingale survives until one streak ends the account — which is precisely what a prop firm's drawdown structure guarantees. Many firms name it explicitly under 'gambling behaviour', alongside all-in sizing.
Grid variants and aggressive averaging-down often fall under the same clause even when not named.
Related terms
General industry definitions — individual firms define terms differently in their own ToS; the decoded rulebook for each firm is the source of truth. Educational, not financial advice.