I've discussed this type of setup before, here's another example
What I like to do is scan FINVIZ in the morning for the stocks that are taking big volume and are up a large percentage.
here's a link to my Finviz Scan:
Generally these stocks had a huge run-up in the morning on big volume, I don't chase them. later in the morning or day I view 5 min charts of these stocks, many times what will happen is after the initial morning runup, price will pullback and flag to the 9 and 20 MA's, or form a tradeable pattern like a bull flag or wedge etc, and the pullback will be on lighter volume. This allows for a low risk entry before another hard pop, see chart