Basically what CP is saying is


At X mins to the start of a match or race you would try to lay a horse/team at the lower odds. ie if it shows $4.00 - $4.40 you try and lay at $4.00.

At 0mins to start you just trade out your position regardless of if the horse has increased to $5.00 or dropped to $2.00.

there are enough times where you get the movement go your way to disregard the times it doesn't.