Yes Flags are explosive patterns. No guarantee it will be to the upside. It has had a KABOOM already but dropped back to the top of the Flag. Still bullish and Flags are continuation patterns. And the pattern did form from the 608 support which created the Flag Pole. So odds are you are "Forked" all right. But this is Corn which likes to screw people's lives up too. Price needs to rally up further and as you suggest take out 717 to expect at least a double top or more likely new rally highs. (oops,is that allowed to be stated anymore)