traider is right, HFT is a guaranteed money maker; however, it requires a huge capital investment beyond the means of most individual traders.
For individual traders, yes there are several strategies that are very profitable. However, there are none that anyone would be willing to publish for free. Let's say a trader has a strategy that averages $100 per trade. If he published it, more and more traders would start using the strategy, and the average profit would drop to $50, then $20, then $10, then $1 (yes there are traders who would be happy with only $1 profit per trade).
You have to find your own winning strategy.