Nothing in trading world will tell us with certainty what is going to happen in future. But TA tells us what is the trend so what are the probabilities of price movements, S/R so that we know what are support and resistances and that is all that is required for trading. Future need not be predicted ,no one can do it with any consistant accuracy..
If we are in uptrend and the market dips to a support area, we buy with a stoploss so if the support holds and the uptrend continues ( which has a strong probability) ,we make 2R,3R or more by taking risk =R . If the support does not hold, we loose 1R ....
This to me is a holy grail in trading.
Smart_trade