“Fight Valley” (*1/2 out of four) was a grimy exploitation pic about female underworld streetfighters all of whom naturally look like models and one of whom is murdered and her determined sister (Susie Celek) attempts to go undercover as a fighter and find out “her killer.” Unpleasant and unbelievable from the word-go and not likely to satisfy MMA or t & a fans. Roger Corman was making far more entertaining movies with this same storyline in the ’80’s. Bottom of the world, ma!