I developped (thanks to my co-partner) a NHL Software (a computer program) which produces NHL Draw (Tie) Plays. So this system doesn't have a exact formula. All picks are computer-based picks. I'm playing/testing these OT/SO plays since 14 October. Actual record is +50.04 Units (betting max. 1 unit per game) since 14 October. So if you're betting 10 units per game it's +500 Units.
Have a good weekend everyone!