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Detailed methodology for cryptorainbowcharts.com, including price sources, log regression, rainbow band logic, update frequency, limitations, and disclaimers.
The market list is fetched from CoinGecko using the top crypto assets by market capitalization. Daily historical USD price data is fetched from CryptoCompare when available.
If CryptoCompare returns sparse history for an asset, the data fetcher falls back to CoinGecko daily USD market-chart data. The generated pages use static chart data, not a live exchange feed.
For each coin, the chart maps time since the first available observation and price into natural-log space. It then fits a power-law trend using the relationship ln(price) = a + b * ln(days_since_inception).
In regular price space, that fitted trend becomes price = e^a * days^b. This helps compare long-running assets whose prices can move across many orders of magnitude.
After fitting the trend, the model calculates the log residual for each historical observation: ln(actual_price) - ln(model_price). It measures the standard deviation of those residuals and draws several bands above and below the fitted trend.
The default rainbow width uses a 0.55 multiplier in the app. Wider bands make zones less sensitive; narrower bands make assets move between zones more easily.
Chart data is designed to update through the daily update workflow. The latest generated timestamp currently available to the pages is 2026-06-09.
Each coin page displays the last observation date so readers can tell whether a chart is current enough for their needs.
Rainbow charts are visual valuation frameworks. They do not know about protocol changes, regulatory shifts, liquidity conditions, token unlocks, exchange outages, macroeconomic shocks, or future investor behavior.
Short histories can be especially fragile because the fitted trend has less data to learn from. Stablecoins, wrapped assets, funds, and tokenized real-world assets may also behave differently from volatile crypto networks.
Nothing on cryptorainbowcharts.com is financial, investment, tax, or legal advice. The charts are exploratory research tools and should not be used as the sole basis for buying, selling, or holding any asset.
Always do independent research and consider speaking with a qualified professional before making financial decisions.
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A concise weekly digest of current rainbow zones, notable ranking changes, and new chart updates. Historical context only, never financial advice.