on USDCAD .
I am pretty new to harmonic patterns but really keen to use them more, so I have a question...
I have a cheat sheet which shows Bearish Bat formation with the ratio from X to B as between 0.382 and 0.5, and ratio of X to D as 0.886.
I notice that your plot does not quite fit these "rules". Is this because the rules are not strictly necessary or because my cheat sheet is wrong?