The lay the favourite system focuses on laying horses, which are expected to start as the favourite and if not so, then at least need to be short priced. Other things that need to be considered for laying the favourite horse are, finishing positions for recent runs, days the horse last ran, performance of horse in its last few races, etc. Any horse that reaches certain ratings is said to having been qualified as a lay selection. Since the favourite is very short priced, it is expected to win the race.