Minimum trading days are the number of days on which a trader must place at least one qualifying trade during a challenge before the account can be passed. If a firm sets the minimum at 5 days over a 30-day evaluation window, the trader must actively place trades on at least 5 separate days. Hitting the profit target in fewer days does not clear the requirement.
The rule exists to prevent a trader from passing a challenge on the back of one or two lucky trades. Prop firms want evidence that the trader can operate an account across multiple sessions rather than reaching the target through a single high-risk position. What counts as a qualifying trade varies by firm. Most require at least one filled position on the day. Some require a minimum position size, and a smaller number require the trade to be held for a minimum duration.
The specific minimum is usually stated clearly in the plan rules. Traders who reach the profit target quickly should keep placing trades within the risk rules until the minimum is met. Closing out with the target hit but the days short results in a failed challenge rather than a passed one.