The risk/reward ratio compares your potential loss (if wrong) to your potential gain (if right). Professional traders require at least 1:2 -- willing to risk $1 only if the reward potential is $2 or more.
Entry: $100. Stop loss: $95. Target: $115.
Risk = $5 (5%). Reward = $15 (15%). Ratio = 1:3.
With a 1:3 ratio and 40% win rate:
4 wins x $15 = $60. 6 losses x $5 = $30. Net: +$30.
Even losing more than you win, you're profitable.
Buy near support (stop just below) with resistance far above.
Buy breakouts from tight bases -- stop is tight, target is the next level.
Avoid 'chasing' stocks that have already moved 20% -- risk is high, reward low.
Pre-earnings drift: defined risk (exit before earnings) with 2-3% upside.
Related: Stop Loss Orders • Position Sizing • Diversification