I'm also been analysing my profit per odds segment and I'm just breaking even in the <$2 segment but am finding okay profits when my top selection is beween $3 and $5. Above $5 is good but I don't have a large enough sample size to get excited about it. The trouble with following odds on runners is that you don't need much luck to make a profit for a few months straight but then if the luck turns it becomes a "death of a thousand cuts" whereby you win a bit, lose a little bit more and so on. I spent 88 bets, $476 just to graft $20 back at just over 5% POT on odds on horses. Thats a lot of work for a result that could have gone the other way, so I avoid them now. If you can sustain your 50%+ POT then you'd be mad to stop though.