Price filters cna be useful.

I use them with a couple of loss recovery staking plans on systems that are very high strike rates. By removing the poorer selections using a maximum price I can make a good profit.

My maximum price on those systems is $3. I won't bet anything over $3. Its a bit against what most people say but see what works for you. By sticking to under $3 I can hit approx 60%-80% winners over a month (betting for the win).

Other systems require a minimum price set of $10. These systems are targetted at the longer priced horses though and are looking for the upset win.

It all depends on what type of system you are using.