You would probably find more that fail if you simply look for a breakout, however if you learn to isolate the criteria of the better breakouts you will likely find a higher success rate (maybe 50%) with a much better risk to reward ratio (4 to 1 or better).
Criteria? Start with longer time frames to establish some key support and resistance levels......this might also help establish a real break out vs just a jump in price right to a resistance.
As far as whether or not they are a "positive expectancy" or not, I would tend to say that they'd be more reliable in an uptrending market.
But you're talking a one minute time frame so your positive expectancy should be measured in minutes imo.