Trends/Volume and money flow

Force index

Today's price change multiplied by today's volume.

Volume and money flowBest on 3M, 6MAlso called FI

Illustration of the force index shape. It is a sketch, not real price data.

What it shows

Alexander Elder's force index is (close − previous close) × volume, usually smoothed with a 13-bar EMA. A big price move on high volume gives a large reading.

Positive means price rose. Negative means it fell. The size shows how strong the move was in terms of volume.

How we find it

The same code that draws it on your chart follows these steps, with the same result every time.

Raw force = (close − previous close) × volume.
Smooth with an EMA (13).
Plot under the price.
Mark zero.

Starting values: Smoothing 13-bar EMA. These are proposed and will be tuned on real price data before launch.

How to read it

The panel shows force.
Above zero: price up with volume.
Below zero: down.

Status labels you may see

Label	What it means
Positive	Force index above zero.
Negative	Force index below zero.
Near zero	Under 5% of its recent range.

What cancels it

Nothing cancels it.

What traders check next

Peaks in force compared with price highs.
Zero crosses.
Volume.

Limits

In odd units (price × shares).
Single big days dominate.
Different stocks cannot be compared.

Try it in forecastviz

Open any ticker and choose Volume and money flow → Force index in the left menu.
Switch between 3M, 6M to see how the picture changes.
Compare with On-balance volume and Volume price trend on the same chart.

Open on a ticker

Questions

What are the units?

Price change times shares. Not comparable across stocks.

Why smooth?

Raw values jump too much.