Chrome,
Your peddling the same mistake those 'winning barrier' books seduce punters into believing .....an enormous, [but false] bias exists for inside barrier wins.

There are more 7 to 12 horse races than 13 to 18 horses races, Instant [false] winning bias for barriers 1 to 9.

All races need to be looked at as separate betting propositions. All the horses in that race have an optimum starting position depending on their running style, track layout, condt., distance, jockey, other horse's running style, including their jockey and barrier.

Most vitamized mass data as a means to making a punting profit, in my book anyway, is a certain road to the poor house.