Are you trading Aus or UK Markets ?

Unfortunately you will be warned off Aus markets eventually due to the turnover tax.

https://www.betfair.com.au/hub/gett...urnover-charge/

Traders eventually not liked on these markets.

So lets say you make 1 tick on a $2.20 shot. So it goes up to $2.22. This means you make less than 1% profit. The turnover charge is 1.2%. You are now losing.

Keep it in mind but you can just exclude the states which are an issue.