Two indicators? That's already a complex system to me . Seriously... breakout systems can be even simpler.
You are all talking about average number of points but how much are the fluctuations around that average ....? the ratio standard deviation/average points per trade determines the safety of your strategy.....
Good questions, will have to look into that. Yes, losing streaks do happpen, but with reasonable stop-losses you can withstand them. Also, it's good to have more them one system to diversify.