Force Index

Hi,
This Indicator plots the Force Index as described by Dr. Alexander
Elder in "Trading For a Living." The ForceIndex indicator relates
price to volume by multiplying net change and volume. ForceIndex is
calculated using the following equation:
ForceIndex = Volume(today) * (Close(this period) - Close(last period))
ForceIndex is typically presented as two smoothed averages (slow and fast)
to avoid false signals.