I use higher value percentage. I have 5,5 for low.
Also longer timeframe then 12 hours.
Also, take a look on the result for different sports.
I hade to remove e-sports for, atleast those bookies I use, I lost mostly on it even thou CLV was good.
You still have very few bets to draw any conclusions. I noticed you’re only betting on exchanges, which is fine, but it’s much harder to make any significant profit on them compared to betting with soft bookies.
I know there aren’t that many bets available on exchanges all the time, but you can increase the time before the match starts to 48 hours and raise the max true odds to 4 to get more bets. That’s the setting I always use.
Please check out the value betting simulator: Simulate Your Success With the Free Betting Strategy Simulator
You need a bigger sample size of bets to reduce the variance. Please read more about why the volume of bets matters: Proof that value betting is profitable (p-value & EV)