The momentum indicator shows the speed of motion of the symbol as it goes bull (positive) or bear (negative).
When the candle closes dark green on the momentum indicator on the weekly, the momentum turns bearish, and the price action doesn't turn around until it's dark red, which is when the bottom is in and it's good to start looking to accumulate for long term holds.
Very accurate at spotting when it's really a crash and not a dip. Will be looking at this at the end of this week.