This is false. I bet only dogs using my MLB System and am up 56 units on the year. Least amount of profit it has shown is +35....Watching this with much interest.
conclusion:
NO system of play works enough to be a consistent tool.
My opinion (and ONLY my opinion, not making ANY judgements!) is that you have to handicap each and every game with the data available for that matchup. NO blanket system will work enough 'consistently' to utilize on a regular basis. At least, none I have ever seen, yet. Tho, props to you to keep looking! Good luck, mi amigos.
US