It's necessary to observe the value of indicator if its above zero or not. If Value is above zero, movement is up and below zero means direction is down. While the crosses happen in zero line, support of other indicators helps to decide chose the invest position.. I think, the indicator shows good signals 4 hours or upper time frames in Cryptocurrency markets. And its useful for fx markets. I must tell an important thing. Reversals should be confirmed with other indicators or price actions.
Thanking you in advance