As it can be seen the T3 version is very smooth even without using additional smoothing (that is one of the reasons why some versions added JMA smoothing to it — to make it smoother than the original, but regardless how good the JMA is it means adding lag too. No lag adding in T3 version).
One of the advantages of T3 velocity: you can control the "speed" of it with simply changing the Hot field.
Ron Black's swing line indicator for MetaTrader 5 version.Jurik Velocity
Jurik velocity ("smoother moment") with added choice of prices.