How to calculate perfect risk reward ratio?

his is the major problem i am facing these day, because after calculating the perfect risk and rward ratio we get to know the acccurate stop loss and the take profit levels...so it is much beneial then.So guys tell me if you know any good method. ...

risk rewrad ratio ko ham apne account ke mutabic hi manage kar skate hen yh nahi he ke hamare pass 100 dollars ka account ho or ham usme 1 dollars ki lot se entery len is lie hamko money management ko pahle dekhna he phr ham jo bhe trade len woh ham market ki movemnent se len

gee bhai hmein apne trading mein risk ko smjhna hota he aur hm apne trading mein stop loss aur take profit ka istemal krna hota he aur hm apne trading mein sahih mhnt krien aur apne trading ke risk management ko smjhein phr hmein apne trading profit acha de ge