I had success with martingale in baseball. I was also running a thread in a forum, if you search internet you can find it.
It's possible to have success with martingale UNLESS you limit your chase. Regular martingale never works. If you limit your chase, you also limit your risk and exposure. If you chase up to 2 or 3 games, and if you have an *edge*, you can make profit with martingale over long haul.