Popular, colourful, easy to read — but more art than science. Here is what it actually is, and a more transparent way to read the cycle.
The Rainbow Chart fits a logarithmic regression to Bitcoin's price history and draws coloured bands around it — from "fire sale" (cheap) to "maximum bubble" (expensive).
The bands are fitted to past price with no fundamental basis — they shift as new data arrives, and the chart is explicitly "for entertainment." A nice visual, not a model.
Instead of colour bands around price, the ARC Index reads four independent, fundamentals-driven signals into one transparent 0-100 score with five regime zones. Same easy read, far more rigour.
Swap the rainbow for one transparent 0-100 score built from real signals.
Check the live ARC score →