Are you asking about where to bet OR where do you go to backtrack past divies?

If the 1st (and you can go back and check via tab sites with extra time anyway): Disable, Bin, Eliminate, Close all TAB accounts. You cannot win long term unless you have 1 of an all-mighty system.
Go to Sporstsbet.com.au and get the best of the 3 states as a starter until you understand what your selections are bringing you and then what you expect from them.
From your previous posts you seem to be a high strike rate low divie man. Which is what i am only place betting so its a lot easier expectation wise as the margin bands is smaller.
I know what i should be getting as dividends from the 3 states before they cross the line.
I expect:
1 of the 3 atleast to be right on my expectations,
one to be below because its carrying a little extra weight by means of support on the individual race or carry overs from all ups etc.
The 3rd one i expect to exceed my expectations for no reason other then they went a little easier on it.
After all this time i can now sit on betfair and match a price that i believe will be that of the 1st or 3rd one >>> be on or exceed my expectations from the best tote. << This is something you can only get through experiance with your own individual system....again...based on knowing over time what you expect. Nobody can teach you this. Its gut instinct.
If i dont see what i like then i go best of 3 and know the odds are, that i will get that over expectation dividend....maybe not on a particular race but long term. Theres a percentage of my POT that's a little extra because of knowing what my expectations are and looking for that + more.
Yesterday Dark Target in Ascot paid $1.04 / $1.04 / $1.50 unitab. I expected to get $1.20. i would have taken $1.25 - $1.30+ on betfair. As it turned out 2 totes were below my expectations but unitab was over well and truly. The same for a few others like Sweet Julia $1.40 / $1.40 vic $1.90. i was expecting $1.50 tote and would take betfair at $1.50+ to secure it.
At the end of the day you must know your system back the front, know what divies you need + want, sit on a best of the 3 site on the 2nd last page before process screen ready incase your betfair expectations arent met.
Chrome knows how to answer your other question about how many bets gone through until you think you have something......
I use moving average bands myself just like the sharemarket. Not only can they help in knowing when your due or can expect a pull back, but can also tell you where your system should sit, or if a new system where it looks like its going to sit.