### Formula

RS | relative strength,relative strength factor,RS |

EMA(U,n) | exponential moving average of upward change,EMA of upward change |

EMA(D,n) | exponential moving average of downward change,EMA of downward change |

RS | relative strength,relative strength factor,RS |

EMA(U,n) | exponential moving average of upward change,EMA of upward change |

EMA(D,n) | exponential moving average of downward change,EMA of downward change |

Exponential moving average of upward change (EMA(*U*,*n*))

Exponential moving average of downward change (EMA(*D*,*n*))

Relative strength (RS)

Precision

- Wikipedia article: Relative strength index.