I'm still not sure how the OTC listing and its shares/fractional...

I'm still not sure how the OTC listing and its shares/fractional price works. But overall, some sort of currency trade risk still happens. I'm also not sure how its being "set" in OTC, but via ADR, its possible some "rules" are establish for this. I think it might be similar to how ETF work, only there might be a conversion of say 6 to 1, 10 to 1, find of deal happening. Another share I hold has an ADR, but the SP btw the ADR and ASX doesn't really correlates as well. I think BHP, which once upon a time was dual listed has the same issues where ASX listed price was different to the london listed price, even with conversion.
Someone in the trades, maybe could explain better then me and how it works in this case.