Track 1 · Hurst cycle analysis · Lesson 1.5 · 6 min
The FLD: how it is built
The Future Line of Demarcation is Hurst’s best-known tool. It takes one simple step to build, and it turns a cycle into a line you can trade against.
One step: shift it forward
Take the middle of each bar, halfway between its high and low. Join those points into a line. Now slide the whole line forward in time by half of the cycle you are studying.
That shifted line is the FLD for that cycle. Each cycle gets its own FLD, so a chart can carry several, one per cycle.
Why half a cycle?
A cycle’s high comes about half a cycle after its low. So if you move the line forward by half a cycle, the copy of a low lands where the next high is due, and the copy of a high lands where the next low is due.
When the cycle is keeping its rhythm, price and its shifted copy cross near the turns. That is why crossings matter: they mark the moments when the cycle has turned.
It runs into the future
Because the line is moved forward, the last part of it sits to the right of today’s bar, over bars that have not happened yet. You can see in advance where the FLD will be.
That is where its name comes from: a line that marks out the future.
Smoothing
Bar midpoints can be jumpy. Averaging them over a few bars before shifting gives a calmer line with fewer false crossings, at the cost of reacting a little later.
Everything depends on the length
The shift is half the cycle length. Use a length that is too short or too long and the line sits in the wrong place: crossings come early or late, and the targets you will learn about next move with them. Getting the length right is the most important step in building an FLD.