In my experience, ElliottWaveanalysis works best to anticipate market turns, and if you are interested to see more examples of this, visit my other blog www.wavetimes.com.
ElliottWaveanalysis suggests that not only will the correction be sharp, but it will go deep and can potentially reach the minor wave ii within the fifth wave.
The reason why some of us are enthusiastic users of ElliottWaveanalysis is because it allows us to take into account new information as it becomes public knowledge.