If you’re in Canada and place a buy order it may be negotiated at a sell price.
You can buy COTRP above the bid and below the ask and it’ll show up as a sell.
If you buy below the ask it’ll always show as a sell. I could place an ask order at $1.00 and if someone bid at $0.99 but the displayed bid is $.10 it’ll show as a sell rather than buy, regardless of the difference.