The Bitcoin Rainbow Chart is a popular long-term valuation tool that visualizes Bitcoin’s historical price trends on a logarithmic scale, using color-coded bands to indicate market sentiment and potential buying or selling opportunities. Created in 2014 by a Reddit user named “azop” and refined in 2019 by Bitcoin user Rohmeo, it applies a logarithmic regression curve fitted to BTC’s price data, dividing it into nine rainbow-like bands from dark blue (oversold “fire sale”) to dark red (overheated “maximum bubble territory”). This chart helps investors ignore short-term noise and focus on cycle phases, with warmer colors signaling caution and cooler ones suggesting accumulation.
How the Rainbow Chart Works
The chart plots Bitcoin’s price against time on a log scale, smoothing exponential growth for clearer trend analysis. Bands are derived from historical highs and lows, interpolated for sentiment zones:
- Dark Blue: “Basically a Fire Sale” – Extreme undervaluation; prime buying zone.
- Blue: “BUY!” – Strong accumulation signal.
- Light Blue/Green: “Still cheap” / “HODL!” – Fair value; hold or add.
- Yellow/Orange: “FOMO intensifies” / “Is this a bubble?” – Caution; potential tops.
- Red/Dark Red: “Sell. Seriously, SELL!” / “Maximum Bubble Territory” – Overvaluation; exit risk.
As of October 21, 2025, with BTC around $112,000, the chart places it in the green “HODL!” band, suggesting fair value after recent dips but room for upside in the ongoing bull cycle.
How to Use the Bitcoin Rainbow Chart
Interpret the chart as a mean reversion tool: Buy in cooler bands during bear markets or corrections, as BTC rarely stays oversold long-term. Sell or take profits in warmer bands near cycle peaks. Combine with indicators like RSI for confirmation—oversold RSI in blue bands signals entries. Historically, post-halving rallies push BTC through bands, with the blue line acting as bull-bear divider.
Limitations: It’s backward-looking, ignoring fundamentals like ETF inflows or regulations; past patterns may not repeat in 2025’s maturing market.
The Bitcoin Rainbow Chart offers a fun, visual aid for cycle navigation, helping investors spot undervalued zones amid volatility.
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