To manage risk reward ratio, you also need good knowledge. The ability to find a good trade is important. You have to find out what you are best at. How many entries are right and wrong out of 10. Sometimes 1:1 risk reward can be good if your winning ratio is more than 50%. It's actually a trail and error process. You have to find what's best for you.
The risk/reward ratio is used to assess the profit potential (reward) of a trade relative to its potential loss (risk). Both the risk and reward of a trade are based on boundaries that the trader sets. Risk is most common in the forex market and to manage risk to reward ratio you need good knowledge about trading.
generally we the traders always tale risk with no risk management , as a result most of the time we become loser. we have to take risk accurately with analysis and predict ability that comes from good knowledge.