The risk/return balance could easily be called the iron stomach test. Deciding what amount of risk you can take on while allowing yourself to walk away from your computer without worrying and to get sound rest at night while you have long-term trades open is a trader's foremost important decision. The risk/return balance is the balance a trader must decide on between the lowest possible risk for the highest possible return. Remember to keep in mind that low levels of uncertainty (low risk) are associated with low potential returns and high levels of uncertainty (high risk) are associated with high potential returns. Trading is all about risk and probabilities. Understanding the inner functions of your trading strategy(s) and proper placement of entry and exit orders will assist in limiting your risk exposure while maximizing your profit potential.
What about how much of your account to place on each trade, or in other words the number of lots per trade? How much of your account have you lost in a single trade? Was it to much to swallow? If so you might not have utilized proper risk management and over leveraged your trade. Establishing the right level of leverage and corresponding margin requirements are a big part of managing risk. How are you doing?