Sada, I think it means for example:

Do not go long if price is 1.1785 through 1.1799 (because there will be resistance at the "round" number -- 1.1800, and it might retrace back down)

Do not go short if price is 1.1715 through 1.1701 (because there will be support at the "round" number -- 1.1700, and it might retrace back up)

But I could be wrong!