In simple terms - a 9 Day MA crossing 20 MA or a 20 MA crossing 50 MA.
ENTRY - Take the next trade of the cross over on close or near the close.
PROFIT - As per Risk Reward you set or Ride till the reverse happens whichever is early.
STOP LOSS is few (%) Points below the reversing cross over to avoid whiplashes.
See this Balrampur Chinni Chart - So Sweet Isn't it. Try on your favorite stocks.
Exponential or Simple - Results are same.
9 crossing 20 or 20 crossing 50 or 50 crossing 100 is your choice on the time frame one wants to trade.