Point & Figure charts display trend reversals in security prices.
On these charts, an X shows an increase in price and an O shows a decrease in price. A new column is started each time a trend reverses. You can control the sensitivity to trend reversal by defining the box size and reversal figure.
The box size is the smallest price move that will draw either an X or an O. (Xs and Os are not drawn if the price changes by an amount less than the box size.) For instance, if you define a box size of 0.1, then:
The reversal figure is the number of boxes necessary to reverse a trend. For instance, if you define a box size of 0.1 and a reversal of 4, then the price has to move by 0.4 in the opposite direction of the current price trend before a new column is drawn.
The advantage of using Point & Figure charts is that they eliminate insignificant price movements and highlight the underlying supply and demand of a security.