Comparing potential loss vs potential gain
Risk-to-reward (R:R) compares stop distance to take-profit distance.
If you risk 50 pips to make 100 pips, R:R = 1:2.
You do not need to win every trade if reward outweighs risk over many trades — but win rate and R:R must be realistic together.
Example: 40% win rate at 1:2 R:R can still be breakeven or better before costs — maths matters more than hype.