One small advise: as a professional trader, forget all your deterministic education as there is no secret formula to risk management and optimal trade strategies. There is always a risk involved (unless you do insider trading, which is illegal, so not financial but there is a legal risk even with that).
The way most (successful) traders operate, whether fx or equities or commodities, is by making their own personal objectives, which have to be in accordance with your own risk appetite. So if you want to earn, lets say, 50 pips on your base size of 1 lot, and you believe that your trend will give 10 pips with high probability, then increase your risk level and enter with 5 lots (do the necessary pip-currency adjustment). Also accept that you are responsible for your actions.