Elliott Wave patterns are most common in charts of mass psychology. They are an imperfect science but do surprisingly appear more often than random. Its effectiveness can be really strong during times of volatility and movement - and in other times, when the market doesn't move much- then the pattern is not clear. So really depends on when the market decides to act in Elliott wave pattern or not. When it does, then it's much easier to predict each twist and turn.
Oftentimes, the pattern structure is much more predictable than the exact level. But it does help in providing guidance as to what to reasonably expect given what has happened.