Il Flag forma un triangolo sul chart e solitamente il mercato prosegue nella direzione indicata dal lato più forte...
via investopedia
Flags and pennants are among the most reliable of continuation patterns and only rarely produce a trend reversal. The only difference between the two patterns is that a flag resembles a parallelogram (or rectangle) marked by two parallel trend lines that tend to slope against the prevailing trend. The pennant, however, is identified by two converging trend lines and more horizontal which resembles a small symmetrical triangle. The important thing to remember is that they are both characterized by diminishing trade volume and though different, the measuring implications are the same for both patterns as demonstrated in the above illustration.
