michaelg,

I realise your making a profit because over the last few days a few long shots have come in (especially Friday night). Have you checked what the strike rate was for winners in the $1 - $3 range, $3-$5 range, $5 - $10 range, $10+ range and compared it to overall profit you made.

In order for this to work long term you want to make sure the $1-$3 range is showing at least 35% as per long term statistics for this range. You might find that you just got a few days where the $10+ range had a few more winners then normal.