Three Line Break charts display a series of vertical boxes ("lines") that are based on changes in prices. As with Kagi, Point & Figure, and Renko charts, Three Line Break charts ignore the passage of time, and filters price action.
The term "three line break" comes from the criterion that the price has to break the high or low of the previous three lines in order to reverse and create a line of the opposite color.
The Three Line Break Charts are actually Any Line Break Charts.
They are not limited to just a three line reversal.
You can create Two Line Break Charts, or even Eighteen Line Break Charts, if you wish.