Entry, stop, and target in. Your ratio and the win rate you'd need to break even out.
This is a simple calculation from the prices entered. It doesn't account for fees, slippage, or the probability the trade actually reaches your target. A good ratio on paper still needs a strategy with a real edge behind it.
A 1:3 risk/reward ratio sounds great until you realize a strategy with that ratio still loses money overall if it wins less than 25% of the time. The ratio and your actual, logged win rate always have to be read together. Neither one alone tells you whether a strategy works.