you were going OK with me until the last condition - that smells a bit like data back fitting for me and you have to be wary of that as there is no last race - its continuous. Some people claim the last race if different - I'm not so sure - it could have been in the old days when people were at the track.
If anything i think it could be the easiest as there can be a favourite bias as people look to get out.


However if you can maintain a 16% POT consistently you are in the top 1% of punters in the world.

The simplest way to improve that would be to place your bet where you get the most advantage - thus look for early fixed and also use BF.

Also carefully examine your " run of outs" sequence - if you have had a quite long and unexpected sequence somewhere it will be telling you that down the track your SR will " revert to the mean" and will reduce - thus putting pressure on the POT.