Hull Suite: the Hull average as a trend regime tool

What it measures

The Hull Moving Average takes a weighted average of half the period, doubles it, subtracts the weighted average of the full period, and smooths the result over the square root of the period.

That arrangement removes most of the lag of a weighted average while keeping it smooth, which is why the line hugs price closely without becoming jagged.

The suite adds a direction reading from the slope, turning a moving average into a regime indicator.

How it is calculated

These are the steps Basis performs, verified against the published definition.

1. 1

   Compute a weighted moving average over half the period and multiply it by two.

2. 2

   Subtract a weighted moving average over the full period.

3. 3

   Apply a weighted moving average of the square root of the period to that difference.

Settings

Periods between fifty-five and one hundred and eighty are common for regime use. Shorter settings turn the direction reading into noise, since the whole point is to describe the prevailing regime rather than the last few bars. Below about thirty the suite stops being a regime tool and becomes an ordinary fast average.

How to read it

• The colour or direction of the line is the signal, not the crossing of price through it — by the time price crosses, the slope has usually already turned.
• A flat Hull line means the doubling and subtraction have cancelled out, which happens in a range.
• It leads most other averages at turns and, like every low-lag construction, occasionally leads them into nothing.
• The square-root smoothing at the end is short by design, so the line is smooth in slope but not in level — it can move a long way in a single bar.

Where it misleads

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