I have a system that will produce anywhere between 50 to 200 potential lays a day (depending on the number and type of races on offer). About 5~10% will actually be at layable odds (<=$11.00). It is a pain to sit and watch race after race after race go by, checking each contender and not being able to lay it.

I am in the process of writing a bot to automate the process. The reason for 'rolling my own' rather than use an existing one is I want to put some smarts into it - checking the tote prices etc. Race times changing and late scratchings will be a major problem too. Need some way of sorting that out... Hopefully the bot will be able to get a better price more often than I can.