Bitcoin Rainbow Chart: Complete Guide 2026

The Bitcoin Rainbow Chart is a long-term valuation tool that overlays logarithmically-scaled color bands on Bitcoin's price history to suggest whether BTC looks undervalued, fairly valued, or overvalued relative to its historical growth trajectory.

Created in 2014 by Bitcointalk user "Trolololo" and Reddit user "azop," it uses nine color bands ranging from dark blue ("Fire Sale") through green and yellow to dark red ("Maximum Bubble Territory").

It was revised in November 2022 (Version 2) after Bitcoin’s price broke below the lowest band for the first time following the FTX collapse. Use it as a macro lens alongside RSI, moving averages, and on-chain data, not as a standalone buy or sell signal.

Key insights

• The Bitcoin Rainbow Chart is a sentiment-based, demand-focused valuation model. It visualizes market psychology across Bitcoin's multi-year market cycles, which makes it a useful counterpart to supply-based models like Stock-to-Flow.

• Historically, Bitcoin's price has often lived in the lower blue and green bands around halving periods, then climbed into the yellow and orange zones during the bull market that followed. This pattern showed up around the 2012, 2016, and 2020 halvings.

The Bitcoin Rainbow Chart is a macro-level price visualization tool that applies a logarithmic regression curve to Bitcoin's full price history, then divides that curve into nine color-coded sentiment bands. Each band communicates a broad valuation signal, deep undervaluation at the bottom to extreme overextension at the top.

Because it uses a logarithmic scale rather than a linear one, the chart compresses Bitcoin's early price volatility (when moves of 1,000% happened) and scales recent data more proportionally.

That makes long-term trends easier to interpret than on a standard price chart, where Bitcoin’s 2010–2013 history is basically invisible next to 2021 or 2024 highs. The trade-off is simple: it’s slow, broad, and blind to sudden shocks like regulation, macro news, or exchange failures.

The Bitcoin Rainbow Chart emerged from two separate contributions on crypto forums in 2014, when Bitcoin traded around $385. In August 2014, Reddit user "azop" posted a Bitcoin chart with a rainbow over it, framing it as a joke about the speculative nature of Bitcoin investing.

Soon after, Bitcointalk user "Trolololo" published a more rigorous logarithmic regression model on October 22, 2014, titled "Logarithmic (non-linear) regression Bitcoin estimated value."

Those ideas merged into what became the Bitcoin Rainbow Chart, combining a regression framework with color-band visualization. Over time, Blockchain Center contributor "Rohmeo" maintained and modernized the chart, and released Rainbow Chart V2 in November 2022 after Bitcoin’s crash below $16,000 broke the original model’s lower boundary for the first time in nearly a decade.

A further recalibration followed in 2023 to reflect a maturing market and lower volatility compared to earlier cycles. The chart has now been active for over 10 years, which is a long run in crypto years.

The Rainbow Chart uses nine color bands, each with a sentiment label. As price moves up the rainbow, the implied sentiment shifts from “nobody wants this” to “everybody wants this.”

• Dark Blue: "Panic/Fire Sale": Maximum undervaluation

• Blue: "Buy!": Strong buying zone based on historical precedent

• Blue-Green: "Accumulate": Favorable long-term entry point

• Green: "Still Cheap": Below fair value, accumulation remains attractive

• Yellow-Green: "HODL": Approaching fair value, hold existing positions

• Yellow: "Is This a Bubble?": Above trend, slightly overvalued

• Orange: "FOMO Intensifies": Very elevated valuation, worth considering some profit taking

• Red: "Sell. Seriously, SELL!": Overbought conditions, getting close to correction territory

• Dark Red: "Maximum Bubble Territory": Extreme overvaluation

Bitcoin’s halving reduces the block reward paid to miners by 50% roughly every four years. It is a major recurring event because it reduces the rate at which new BTC enters circulation, which has historically set up a supply shock.

The four completed halvings occurred on:

• November 28, 2012: reward reduced from 50 BTC to 25 BTC

• July 9, 2016: reward reduced to 12.5 BTC

• May 11, 2020: reward reduced to 6.25 BTC

• April 19, 2024: reward reduced to 3.125 BTC

Across the first three halvings, Bitcoin’s price was in the lower blue or green bands at or near the halving date, then later pushed into yellow and orange during the 12–18 month bull market that followed. The 2024 halving looked different: Bitcoin entered the event already above $60,000, which put it in higher bands than the classic “accumulation zone” story.

That shift lines up with a more mature market, and with participants anticipating the Bitcoin halving effect earlier.

The Rainbow Chart can be useful, but it has sharp edges. It has been recalibrated multiple times since 2014 to preserve its visual structure when Bitcoin’s price behavior deviated from the original model. Any model adjusted retroactively fits history better than it predicts the future.

Retrospective bias is the core limitation. The regression curve comes from historical price data, so it is backward-looking by design. It cannot price in unprecedented events like exchange failures, sovereign adoption, major tech shifts, interest-rate regimes, or regulatory crackdowns. Treat it like a weather vane, not a weather forecast.

The Rainbow Chart works best as a “where are we in the cycle?” tool. It can help you decide whether the current environment looks more like accumulation, neutral, or late-cycle froth, without pretending you can time exact tops and bottoms.

If you use it at all, pair it with other tools that operate on different timeframes:

• Stock-to-Flow (S2F): scarcity and supply framing, compared to Rainbow’s demand and sentiment framing.

• RSI (Relative Strength Index): a tighter timing layer for overbought (above 70) or oversold (below 30) conditions.

• 200-day moving average: a simple bull vs bear structure check.

• On-chain metrics like MVRV and exchange flows: independent validation that does not rely on regression bands.

The Bitcoin Rainbow Chart has stuck around because it turns a decade of messy price history into a quick, readable picture. For long-term investors, the lower blue and green bands have historically lined up with better accumulation windows, while orange and red have often come before major pullbacks. For active traders, it works best as background context, not a trigger.

Like any model, it’s a lens. Use it to ask better questions, not to outsource decisions.