Hopefully one of these hasn't been made, this is a synthetic smoothed momentum (Mladens smoothed version) with floating levels and alerts.
To those not familiar with Mladen's smoothed momentum this is his explanation:
For people using momentum:
Momentum is a very useful indicator. But probably the biggest problem it has is that it can create a lot of false signals simply because it is not smooth. This is one way how it can be solved without adding any lag at all (on the contrary: in some cases, it is faster than momentum). Here is a comparison: red is the smoothed momentum, blue is the regular momentum (same period, same price)