Alley

Hi
Could anyone answer this question to me?
What is the meaning of *up in my alley*

Artists like Alansist and Michelle would be right up my alley
thanks

Which is it, "up in my alley," which I've never heard, or "up my alley"? The directional "up" is not usually meant literally. Downtown, uptown, down the shore, up my street, up my alley, are common indicators of location. "Up the street" means farther on than some reference location, as in "up the street from my house." "Up my alley," or especially "right up my alley," means that whatever is referred to is of special interest to me, perhaps because of taste, perhaps because of expertise. SS