To do that we need knowledge, experience, and a little luck. In fact, no one can guess 100% accurate but if you have your own technique, reasonable entry and exit times, I believe it is still possible to make a profit this way.
Agree, Knowledge is a must in this market, without the knowledge, we would not be able to do anything and we would completely fail, and we can never know the reasonable entry and exit time of each transaction. So we need a little luck in this market to get profit