This indicator will give you the momentum readings (rate of change) for five lookback periods (15m, 60m, 4hr, 24hr, 48hr).
This is useful when backtesting or retroactively logging the readings into your trade journal (there is no way to roll back the Forex Factory momentum screener that I know of).
There are lines drawing in the background which are set to 100% transparency by default, so don't be puzzled when you occasionally see the bubbles for the line plots being highlighted on your chart.