New TA/Charting, page-14384

You certainly can have some give and take in charting as it is so subjective. Especially with support and resistance levels and changing moving average periods and indicator timing but...... Elliott is the one principle that does have a set of rules that are fixed, that was his idea to remove any doubt about wave formation. They are fixed, the most predominant being wave 3 not the shortest (just an example). Corrective waves have rules as well as motive.

Elliott and subsequent authors came up with guidelines which can be broken with care. This covers any minor anomalies.

The best I can do is refer you to the "bible", Elliott Wave Principle by Frost and Prechter.

With Elliott, if any rule is ignored the approach is invalid or incorrect, there is no grey area.