The 50% rule means that in a single trade, one cannot have 50% of the target set in challenges or, in the case of a live account or direct pass to real, 50% of the total profits available for withdrawal.
For example, if you acquire a direct pass and generate $1000 in profits that you wish to withdraw, none of the trades used to reach that $1000 should exceed $500, which is 50% of the total.
What happens to trades that exceed the 50% limit?
They are reserved for a subsequent withdrawal where the trade is less than 50% of the profits earned up to the point of the new withdrawal request.
EXAMPLE:
If you currently have $3000 USD ready to withdraw, the previous $500 USD trade no longer represents 50%, so now you can withdraw it!