CGDI, the CoinGlass Derivatives Index, is a second condensed reading of derivatives posture, assembled from a different combination of inputs to the index beside it. Having two is the point rather than an accident.

One summary can be wrong in ways nothing on the screen reveals. Two summaries built differently can be checked against each other, and that check is worth more than either line by itself.

What it actually measures

The line rises as posture stretches and falls as it thins, and like its neighbour it is read as a position within its own record rather than as a level. The two are on the same footing, which is what makes them comparable.

Agreement between the two is the strong reading. When both sit high, the stretch is showing up in more than one part of the derivatives complex at once, which is much harder to dismiss.

Disagreement is the more interesting state. It says one corner of the market has moved and another has not, and that split is information a single combined view would have quietly hidden. Two lines that never parted company would be worth far less.

Two imperfect gauges beat one confident one

Every composite embeds a judgement about what matters. Two composites built on different judgements will fail in different places, so the cases where they agree are the cases where the judgement itself is not doing the work. It is a modest claim, and it is easily the honest one.

That is why the pair should be read together and never averaged. Averaging them throws away the one thing having two of them buys, which is the ability to see when they disagree.

What it does not tell you

The two are not independent in any strict sense. They draw on an overlapping market, so agreement is easier to come by than it would be between genuinely unrelated measures.

It shares every blind spot of a composite. Direction, venue and instrument all vanish into the single number, and each has to be recovered elsewhere on the dashboard before the reading means much.

A divergence says the market is not moving as one, and nothing more. Which half turns out to have been right is not a question this view can settle, and waiting for the two to converge is not a strategy either.

How to read it

Elevated risk. Posture is stretched when measured against this index’s own record.

Ordinary. The reading sits inside its usual band.

Subdued risk. Positioning is unusually light against the record this index keeps.

The Derivatives dashboard holds CGDI together with CDRI, OI Ratio and Derivative Load.

Common questions

Why keep a second index at all?

Because it is put together from a different mix of inputs, which lets the two disagree. A split usually means one corner of the market has stretched while the rest has stayed where it was.

What should a divergence be read as?

As unresolved rather than as licence to pick the more convenient line. A split says the market is not moving as one, which is itself worth knowing.

Why read it against price?

Because a reading is only interpretable once you know the path taken to get there. Posture building while price falls is the pairing worth stopping on.

Are the two indices independent?

Not strictly. They look at an overlapping market, so agreement comes more easily than it would between two genuinely unrelated gauges. It is still worth more than one line.

Can the pair be averaged?

It defeats the purpose. The whole value of holding two is seeing when they part company, and an average is exactly the operation that hides it.