yes ... however you still need an angle ... betting blind you cannot win long term.
Concentrate on a particular type of race, concentrate on early pace horses, on closers, on jockey/trainer combo's, on shippers, on horses that are course/distance winners, on horses that are running second or third race after a break ... whatever the angle .. try and find one that has a reasonably consistent strike rate ... and one that does not necessarily always pick out favorites ... it'll take a while .. there is no simple/easy method - if there was .. we'd all be using it
The book i mentioned earlier will help - as I said .. you are looking for value in the race ... not necessarily for the winner in each race .. but the one that is a bigger price than its chances of winning. If you are betting value each and every time - you can win long-term.