I agree with malaguti, breakouts are great entry points. If you are trying to catch a reversal, say after a meaningful decline, then breakouts won't work. When looking for a reversal entry I wait for price to cross over the 10ema (exponential moving average). I find that this technique works best when price closes back above the 10ema--this indicates a change in the short-term trend. The 10ema works well for many time frames from the daily on down to the 15 minute charts.