On 1M time-frame, it generates a lot of signals just before or after crossovers or the crossovers themselves. But please understand, this is unsophisticated, high-volume trading with an absolute max return of around 65%. I can't imagine it's any higher than that.
That said, I have traded this. I guess everyone tests before they trade, don't they? Whatever you you do, test this before you trade and use Price Action as much as possible. I trust your wisdom.