Rainbow Chart Calculator
A rainbow-style banding built on a fair-value anchor you choose (the 200-week moving average is the classic). Honest version: bands from your anchor, no curve-fit prophecy.
Results (live)
Estimates only, not financial advice. All math runs in your browser; nothing you type leaves this page.
How it works
ratio = price ÷ fair-value anchor
bands at 0.8× / 1.2× / 1.8× / 2.5×
Worked example
Price $65,000 against a $42,000 200-week MA is 1.55×, the optimism band. The same price against a $20,000 anchor would read 3.25×, deep bubble territory.
FAQ
Why not the original log-curve rainbow?
Its fitted parameters have been redrawn after each failure. Anchoring to a transparent metric like the 200WMA keeps the bands honest and reproducible.
What is the 200-week MA's track record?
It has roughly marked bear-market floors in Bitcoin's history so far, touched in 2015, 2018-19, 2022. History is not a contract.
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Estimates only, not financial, tax or investment advice. Verify numbers against your exchange or a professional before acting.