Trading is just being able to recognize that the price is likely to go up and down and placing bets in anticipation of your prediction. if your prediction is right, you make money, if it isn't, you lose. Most people use technical analysis to predict prices.
That makes trading a educated guessing because you need prediction and also knowledge to make better decision and also make profits from your trading activities. Trading is not just like predicting the price because if you will depend on that then you will end up losing your money or often lead to losses while if you add some knowledge to that like reading charts and news then you will come out with a better view for the possible prices.