Technical Indicators

Force Index (FRC)


Purpose

The Force Index indicator invented by Alexander Elder measures the power behind every price move based on their three essential elements, e.g., direction, extent and volume. The oscillator fluctuates around the zero, i.e., a point of a relative balance between power shifts.



Usage

The Force Index allows to identify the reinforcement of different time scale trends:

  • The indicator should be made more sensitive by decreasing its period for short trends.
  • The indicator should be smoothed by increasing its period for longer trends.


The Force Index may strongly imply a trend change:

  • Break-down of an uptrend when the indicator's value is changing from positive to negative and price and indicator show divergence.
  • Break-down of a downtrend when the indicator's value is changing from negative to positive and price and indicator show convergence.


Together with a trend-following indicator the Force Index can help identify trend corrections:

  • An uptrend correction when the indicator bounces off the low.
  • A downtrend correction when the indicator slides from a pike.




Calculation

Force Index(1) = {Close (current period) - Close (prior period)} x Volume
Force Index(13) = 13-period EMA of Force Index(1)


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