This came from Patrick himself on the chat, so make sure you read it. About the current event: " You'll need a certain amount yourself for the first milestone, another amount for the second milestone and so on..."
"You don't have to meet your personal milestone before the global milestone is met, you can start the day before the event ends and catch up if you wanted."
Meaning for the event, there's going to be a minimum amount needed of Trades Completed. That way someone can't mooch off of others hard work. So if someone wants the achievement prize(s), they'll need to get to trading.
