unless there are reversal for all these and the many many others you really can't say the reversal worked.
In the Arrays there it is a common situation that turning points allign in many markets.
With reversals I've also seem alignments, but I've not systematically investigated it.
However, if I trade only 1 instrument and the reversals works reliably, then why should care about other markets? Just to confirm a theory? There are some mysteries about reversals (also for Armstrong himself), but IMO they can remain mysteries, as long as they don't bother my profit too much.