As much as that sounds reassuring, I'm skeptical, to be honest. I watched
an interview on YouTube, and he had quite the 'showman', almost snake oil peddler delivery of his system. Everyone else is wrong, and polls are worthless, but he, he has worked out this revolutionary system that's right every time, the mainstream just haven't caught on yet. Oh, he met a Russian, and a guy predicting earthquakes, how cool!
But he's been right eight times in a row... like a lot of other people who were ultimately just guessing, about everything from horse races to stock trading. Also, far from all of those eight election victories were really that hard to call in the first place. I don't know how consistently he used his system, granted, but up to several of the yes/no questions seem subjective to me when he listed them, and I disagreed with several of his answers.
I mean, I want Trump to lose as much as the next person, but this guy just raises all the red flags for me.
ETA: I would also expect him to apply his system to presidential elections going as far back as he could, data permitting, perhaps all the way back to the founding of the USA. If he has, the report doesn't go into detail on how many times he was wrong. Remember, in a two-party system, the election victory is essentially a coin toss, and it's not too hard to flip a coin eight times and get heads every time.