Quote from Anekdoten:
To add to what J said....
Both are good patterns but the W at the bottom has a higher probability rate than the M a the top.
Anek
If you don't mind I would alter the above by including the following:
...but the W at the bottom has a higher probability rate than the M a the top, providing it is in a bull trend on long term charts. The opposite would apply when in a bear phase again on long term charts. Correct?