Cycle waves aren't labeled numerically on purpose.
For commodities and currencies I think that it makes no sense to label waves past the Primary degree. It does make sense if you count stock market indices because they always move up over time and thus you can apply cycles/supercycles etc.
For commodities and currencies however this doesn't work since they do not always move up over time. Thus, numbers/letters are replaced by "low" and "high".
Author: Patrick Eugster
