...if W happens, then this pattern will be confirmed, leading to Z price. This is perhaps what someone meant by "my wave".
An amateur market mover might see this as an opportunity. I would see it as a risk.
I suspect this could backfire when the market doesn't agree with "your wave". While some people will see the point you've made and follow the pattern, if the overall market doesn't agree, then it will fail. The experienced trader can tell the difference between a crafted (or manipulated) wave and a more natural crowd generated one, and they may choose to bet against your trade.
How then can a market mover identify waves he can profit from? He has to pick waves with sufficient energy (volume).
31-Jul has an example of a spike when someone perhaps thought they could spark a new trend. But the market disagreed.