There are two trading strategies on above Mentioned corrective patterns.
1. Entry before breakout, this strategy based on bullish divergence and RSI and other Oscillators may help to know when correction period is about to end. Look always for oversold
2. Entry after breakout, this strategy simply based on breakout of corrective pattern
3. Stop Loss, stop loss will be behind the corrective pattern for both
4. Target , target is start of the next correction
Entry before breakout, is called risk taking entry rather than the entry after breakout because tight stop loss is used for entry before breakout but risk reward ratio is good rather than entry after breakout.
Entry after breakout, is called risk averse entry rather than the entry before breakout because wider stop loss is used for entry after breakout and breakout confirms trend continuation. This is the reason why most traders trade on breakout but risk reward ratio is not good enough rather than entry before breakout.