Linear momentum is an indicator with some unique characteristics. I mean that is what I have heard although it is pretty similar to Force index which already is a pretty good indicator that comes by default with Metatrader 4 but still there is some difference. Mrtools & V2V have made variations of it (do check them out). All I am doing here is adding a step filter to it. How much value that adds to the indicator, Well that is a matter of testing. Anyway here is the indicator.