Here is what happened in DAX today

2020년 3월 21일

As you can see you can plot and know these levels ahead of time. The work is not done by simply plotting levels you need to have a system that shows which levels are hit with a high chance. But this is part of the secret of professional traders. Even the biggest players on the market plot these levels and exactly these. Other Fib levels like 50% are NOT USED by Funds.