RT EMA crossover or RMA on RT EMA gives you a better entry and a better exit in market timing on a stock. It is a leading indicator ( a day or two) on a change of the primary wave. You buy at or near the green light buyer flashes its signal. It enabe you to profit from the intermediate swings in a sustained trend.

However I have not tested it to evaluate its predictive value on change of a major trend ( up or down) in bull or bear market.

Its application would be best used in weeklys options trading on positions already owned as a mean to add leverage without substantial monetary risk or protect value of the portfolio when Mr. Market has the blues from time to time.