Most professional traders will let others know that they have a strategy which works well for them, even if they won't share it or how it works. When you practice something over and over again, you get to understand all about it, its flaws and strengths.
With a trading strategy, you get something that gives you an edge so that your profits can be more than your losses.
It doesn't mean that the strategy won't fail sometimes, after all, you don't control the market and fundamentals can change suddenly which won't align with the strategy you use, but you can be sure that your losses will be less than your gains and that's what makes a successful trader in any market, not just forex.
It takes time to develop that edge though, so you will need enough funds to try, test and retest many times to find that secret. It's why it's always advisable that you have another source of income to keep you afloat while learning how to trade forex.