Here is topic about risk reward ratio https://www.elitetrader.com/et/threads/risk-reward-ratio.331305/
Yes, is very useful and good tool.
The main feature of Risk Reward Ratio Indicator is to allow the user conscious investing. Each transaction bears certain risk. Risk Reward Ratio...
It is very important to calculate the risk to reward. If you invest without knowing how much you can earn or lose, so is better not invest.
Most traders use RR 1:2 to 1:3, I think the best is 1:2
Separate names with a comma.