Force Index

The Force Index was introduced by Alexander Elder in his book Trading for a Living. It combines price direction, extent, and volume to determine price movement.

Values above zero indicate positive price movement and values below zero indicate negative price movement. Values fluctuating around zero indicate no real price direction.

Calculation

Force Index = (Close - Close[-1]) * Volume

The base Force Index is somewhat erratic so a 13 day EMA of Force Index is usually used instead.

Custom Dates

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Symbol Id Name Exchange Close Price Trade Date
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AAPLAPPLE INC.8/23/2019Nasdaq GS202.64008/23/2019NGSM
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