What is it: It's price-weighted volume along with buy and sell zones, and trade signals.
How it's different: It can show volume in a much more clear manner than regular volume.
How to use it: Buy signals are denoted by lime colored triangles pointing up. Sell signals are denoted by fuchsia colored triangles pointing down. Bigger triangles show that there is some interaction between PWV and the extreme high/low zone lines provided. Smaller triangles show when green/red PWV is moving upwards/downwards respectively. The triangles can be used to enter or exit trades. It can be used any way you like. Here's my suggestion of how to use it: Be patient. Prepare to go long / buy after a downtrend is finishing and as soon as you notice the dark shaded green zone no longer appears (or seems like it won't reappear). Afterwards you can actually go long / buy once you see a small green triangle pointing upwards. Then you can sell whenever the PWV is near or above the shaded fuchsia zone line or falling from it denoted by the big triangle.