The footage that was actually shot on Hollywood Boulevard has colour but when the film jumps in with actors and tries to get the hooker patois down it is godawful a drag queen dies with the epitaph You cant die you still owe me $147 you fucking faggot, which really says all there is to about the film. Former Western star Rory Calhoun appears as a clapped-out cowboy actor roles like this must be an actors equivalent of being reduced to a derelict.
There have been three sequels: Avenging Angel (1985), Angel III: The Final Chapter (1988) and Angel IV: Undercover (1994) which are non-genre and mostly concern the adventures of the titular teenage hooker and her friends. All are terrible. The film was released in the US at around the same time as Neil Jordans fine Angel (1982), causing some confusion between the two for audiences.
Director Robert Vincent ONeill had previously directed a number of other genre exploitation films with the psycho-thrillers Blood Mania (1970) and The Psycho Lover (1970), as well as Wonder Woman (1973), which is unrelated to the DC superheroine but a mad scientist/kung fu film. ONeill also wrote/produced the killer ape cheapie The Mighty Gorga (1970).
Film available online in several parts beginning here:-