Before trading, consider three things: where to enter, where to exit, and how much risk there is. This is the meaning of a trading plan.
Patterns like double tops, double bottoms, and flags are not good opportunities when they are just forming. The right nodes to act are when there is a pullback to key levels and confirmation of validity, because the stop-loss positions are most clear here.
A reliable trading plan has three points:
Confirm entry on pullback, set stop-loss above previous high/previous low, and maintain a risk-reward ratio of at least 2:1.