Testing a gold strategy under prop-firm constraints requires converting the firm's percentage-based daily loss cap and overall drawdown limit into gold-specific dollar figures before evaluating any trade, because a 100-ounce contract means an ordinary $40-60 CPI reaction can consume an entire daily cap at position sizes that look conservative by habit alone.
Static and trailing drawdown structures test differently: a trailing limit rises with every new equity high and tightens available room after early gains, so a smooth, moderate equity curve tends to survive trailing-drawdown testing better than one with sharp early spikes, even with identical average expectancy.
A profit target and time limit convert into a required trade count using the strategy's tested expectancy, and the daily loss cap converts into a maximum tolerable number of full-stop losses per day — both conversions should be done, and a realistic stop-trading rule set well inside the mathematical maximum, before a challenge is purchased rather than discovered under live time pressure.