The volume is the fuel that drives the prices. Most of the existing indicators show with late the result of a cause, because they are not oriented by this input. The only way to understand the cause that generated a price shift result is by analyzing the volume. However, it is very difficult to assess the state of a given market through traditional indicators of this nature. In this way, this Weis Wave implementation comes to make this analysis process easier. First exposed by David Weis, the indicator show the accumulation of volume that occurs in each zig-zag of the price movements. These waves allow the trader to evaluate with much more conviction the market cycles giving the possibility of positioning itself in advance to the movements that actually generate satisfactory profits.