A black swan is an event that comes as a surprise.
Problem with surprises is that you never know when they can happen, if not it would not be a surprise. There is never a sign before it will happen. So you can never know when a possible black Swan event can happen.
If you should not trade before a possible black swan event, you should never trade as it can happen anytime.
In +20 years of daytrading I never encountered a black swan event.
But I already meet real black swans.
What I mean by not trading is not to trade BEFORE a major event that can possibly result in a Black Swan event. But come to think of it, I just thought of it, if you really want to trade before a possible black swan event, there IS a way to trade that is 100% safe: Straddle option!!! No matter which side wins, you will ALWAYS profit!! There you go.
Yes, I have seen real black swans too. They are BEAUTIFUL!