Original title of the first edition is: "Elliott Wave Principle. Key to Market Behavior". It's a very simple key. Good advice - buy the book and read it. Do not use the nonsense contained in the network.
There are three basic rules:
Rule 1: Wave 2 can not retrace more than 100% of Wave 1 Rule 2: Wave 3 can never be the shortest of the three impulse waves. Rule 3: Wave 4 can never overlap Wave 1
The first wave may be, for example ... a triangle.
Bullseye!