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 |
