Crypto Analyzer — Features, Accuracy, and How It Works
A complete breakdown of how the free Crypto Signal Analyzer fetches price data, calculates 11 technical indicators, combines them into a weighted buy/sell/neutral signal, and generates the auto-commentary you see on each coin page.
What the Tool Does
The Crypto Signal Analyzer is a free, browser-based tool that fetches real OHLCV (Open/High/Low/Close/Volume) price data for 25 major cryptocurrencies and computes 11 technical indicators entirely in your browser — no server-side processing, no account required.
The tool combines those 11 indicators into a single weighted buy/sell/neutral signal with a confidence percentage and generates a short auto-commentary explaining what the indicators are saying for that specific coin on that specific day. The goal: give traders a structured, objective technical summary in 30 seconds that would take 15 minutes to compute manually.
Data Sources
Price and OHLCV data comes from two sources with a fallback architecture:
Primary: Binance API
The tool fetches up to 300 daily candles from the Binance klines endpoint for each coin. Binance is the world's largest cryptocurrency exchange by trading volume and provides high-quality, high-volume price data. Binance klines data includes: open, high, low, close, and base-currency volume (e.g., BTC traded per day rather than USD equivalent). This provides the cleanest source for indicator calculation.
Fallback: CoinGecko API
If Binance is unavailable (rate limit, regional block, API outage), the tool falls back to CoinGecko's OHLC endpoint for price candles, plus CoinGecko's market_chart endpoint for USD-denominated total volume aggregated across all exchanges. CoinGecko's aggregated volume covers all major exchanges, providing a broader but less precise volume picture than Binance's single-exchange data.
Market data
Current price, market cap, and 24-hour price change always come from CoinGecko's markets endpoint, which aggregates data from all listed exchanges to provide the most accurate current market price.
Caching
To reduce API requests and ensure fast page loads, fetched data is cached in the browser's localStorage for up to 6 hours. The cache uses four 6-hour windows per day (0:00–5:59, 6:00–11:59, 12:00–17:59, 18:00–23:59 UTC). This means the displayed data is refreshed up to 4 times per day but never more than once per 6-hour window. Repeat visits within the same 6-hour window serve cached data instantly.
The 11 Indicators and Their Weights
| Indicator | Weight | Buy Condition | Sell Condition | Neutral |
|---|---|---|---|---|
| EMA Cross (50/200) | 13% | EMA 50 above EMA 200 (Golden Cross) | EMA 50 below EMA 200 (Death Cross) | EMAs within 1% of each other |
| Support/Resistance | 12% | Price within 3% above 90-day support | Price within 3% below 90-day resistance | Price between S/R zones |
| RSI (14) | 10% | RSI below 30 | RSI above 70 | RSI between 30–70 |
| MACD (12/26/9) | 10% | MACD line above signal line | MACD line below signal line | Lines within 0.1% of each other |
| Bollinger Bands (20, 2σ) | 10% | %B below 0.2 (price near lower band) | %B above 0.8 (price near upper band) | %B between 0.2–0.8 |
| Stochastic RSI | 9% | K below 20 (deeply oversold) | K above 80 (deeply overbought) | K between 20–80 |
| OBV Trend | 8% | OBV 5-day MA rising faster than price | OBV diverging downward (distribution) | OBV and price aligned / no divergence |
| Fear & Greed Index | 8% | Index below 25 (Extreme Fear) | Index above 75 (Extreme Greed) | Index between 25–75 |
| Volume Ratio | 7% | 5-day volume above 1.5× 20-day avg on up-day | 5-day volume above 1.5× 20-day avg on down-day | Volume within normal range |
| Rate of Change (ROC) | 7% | ROC above +5% (strong positive momentum) | ROC below −5% (strong negative momentum) | ROC between −5% and +5% |
| CCI (20) | 6% | CCI below −100 (extreme oversold deviation) | CCI above +100 (extreme overbought deviation) | CCI between −100 and +100 |
Why These Specific Weights?
The weighting reflects the relative reliability and importance of each indicator for daily timeframe crypto analysis:
- EMA Cross (13%): The highest weight because it measures the macro trend — the single most important context for any other signal. A buy signal in an uptrend is far more reliable than the same signal in a downtrend.
- Support/Resistance (12%): The second highest because price structure is fundamental to all technical analysis. Whether price is near a major historical level directly affects signal reliability.
- RSI, MACD, Bollinger Bands (10% each): The most widely used and tested momentum and volatility indicators receive equal weight in the second tier.
- Stochastic RSI, OBV, Fear & Greed (8–9% each): Important but slightly less primary signals — faster momentum (StochRSI), volume confirmation (OBV), and sentiment context (Fear & Greed).
- Volume, ROC, CCI (6–7% each): Supporting indicators that add confirmation without dominating the signal.
How the Combined Signal Is Calculated
Each indicator returns one of three discrete values: buy (+1), sell (−1), or neutral (0). These are multiplied by the indicator's weight (expressed as a decimal) and summed to produce a combined score between −1.0 (all indicators sell) and +1.0 (all indicators buy):
combined_score = Σ (indicator_signal × indicator_weight)
// Example: all 11 indicators firing buy
combined_score = (+1 × 0.13) + (+1 × 0.12) + ... + (+1 × 0.06) = +1.0
// Example: EMA and S/R buy, rest neutral
combined_score = (+1 × 0.13) + (+1 × 0.12) + 0 + 0 + ... = +0.25The combined score maps to a signal:
- Score above +0.10 → BUY signal
- Score between −0.10 and +0.10 → NEUTRAL signal
- Score below −0.10 → SELL signal
Confidence is derived from the absolute value of the score. A score of +0.10 (minimum BUY threshold) maps to approximately 10% confidence. A score of +1.0 (all indicators buy) maps to 100% confidence. In practice, 70%+ confidence signals require most of the highest-weighted indicators to agree.
The Auto-Generated Commentary
The "Technical Analysis Today" section below the signal cards is generated algorithmically from the live indicator values — not from pre-written templates. Each sentence uses the actual computed numbers from the current analysis:
- Overall signal sentence: States the signal (BUY/SELL/NEUTRAL) and confidence percentage. Example: "Bitcoin is currently showing a moderate buy signal with 67% confidence based on daily technical analysis."
- RSI sentence: Describes the current RSI reading and its interpretation. Example: "RSI at 34 suggests the asset is approaching oversold territory, with recent selling pressure beginning to stabilize."
- MACD and EMA alignment sentence: Reports the MACD position and EMA cross status together. Example: "The MACD line is above the signal line (bullish crossover) and the EMA 50/200 shows a Golden Cross — both confirming the medium-term uptrend."
- Volume and Bollinger Bands sentence: Reports volume relative to average and Bollinger Band position. Example: "Volume is 1.7× the 20-day average, confirming buying conviction, and price is near the lower Bollinger Band, suggesting a statistically low price within recent volatility."
- Fear & Greed sentiment sentence: Reports the current index reading and contrarian interpretation. Example: "The Fear & Greed Index at 22 indicates Extreme Fear — historically a buying zone where most retail investors are exiting rather than entering."
Every sentence in the commentary changes as the underlying indicator values change. The same coin will produce different commentary on different days based on its current technical state.
Supported Cryptocurrencies
The tool currently supports 25 major cryptocurrencies:
- Layer 1 leaders: BTC, ETH, BNB, SOL, ADA, AVAX, NEAR, APT, SUI
- Large-cap altcoins: XRP, TRX, DOGE, SHIB, LTC, BCH, VET, POL
- DeFi and infrastructure: LINK, DOT, UNI, ATOM, ICP, OP, ARB
- Mid-cap: HBAR
Each coin has its own dedicated analysis page at/tools/crypto-analyzer/[coin-name] (e.g.,/tools/crypto-analyzer/bitcoin). The main analyzer page shows all 25 coins simultaneously with a summary signal card for each.
Accuracy and Limitations
Technical analysis is probabilistic, not deterministic. The tool does not claim to predict prices — it identifies market conditions that have historically been associated with higher or lower probabilities of certain price movements. Several important limitations:
| Limitation | What It Means |
|---|---|
| No fundamental analysis | The tool does not account for earnings, tokenomics changes, regulatory news, or on-chain fundamentals. Technical signals can be overridden by fundamental events. |
| Fixed weights | The indicator weights are static and not adaptive to market regime. A weight designed for trending markets may underperform in sideways markets. |
| Daily signals only | The tool is optimized for daily timeframes. The same signals on 1-hour or 4-hour data would have different reliability characteristics. |
| 6-hour data refresh | Data is refreshed at most 4 times per day. In fast-moving markets, a signal can become outdated within hours of being generated. |
| No black-swan protection | Exchange hacks, regulatory bans, protocol failures, and macro market crises are not predictable from technical indicators. |
| Single-exchange primary source | Binance data reflects one exchange's price and volume. Prices can differ slightly across exchanges, particularly during volatile periods. |
Privacy — All Calculations Run in Your Browser
All indicator calculations run in JavaScript in your browser. No personal data, search history, or analysis results are sent to any server. The tool's server only serves the initial page HTML/JavaScript — all processing happens client-side.
The only external requests your browser makes are to the Binance and CoinGecko APIs to fetch price data — the same public APIs that any browser or trading app would use. These requests contain no identifying information beyond your IP address.
Frequently Asked Questions
Where does the crypto analyzer get its price data?
Primary: Binance klines API (up to 300 daily candles per coin). Fallback: CoinGecko OHLC and market_chart endpoints. Market data (price, market cap, 24h change) always comes from CoinGecko. All data is cached in localStorage for up to 6 hours.
How many indicators does the analyzer use?
11 indicators: EMA Cross (50/200), Support/Resistance, RSI (14), MACD (12/26/9), Bollinger Bands (20, 2σ), Stochastic RSI, OBV Trend, Fear & Greed Index, Volume Ratio, Rate of Change (ROC), and CCI (20). Each has a specific weight in the combined signal.
How is the combined buy/sell signal calculated?
Each indicator returns buy (+1), sell (−1), or neutral (0). These are multiplied by the indicator's weight and summed to produce a score between −1 and +1. A score above +0.10 is a BUY; below −0.10 is SELL; between those values is NEUTRAL. Confidence is derived from the absolute value of the score.
Which cryptocurrencies does the analyzer support?
25 major cryptocurrencies: BTC, ETH, XRP, BNB, SOL, TRX, DOGE, ADA, HBAR, AVAX, LINK, SUI, SHIB, DOT, LTC, BCH, NEAR, APT, UNI, OP, ATOM, ARB, ICP, VET, and POL.
Is my data or search sent to a server?
No. All calculations run in your browser. The tool fetches price data from Binance and CoinGecko public APIs but no personal data or analysis results are ever sent to any server.
Try the Free Crypto Analyzer Now
No signup. No account. 25 coins. 11 indicators. One combined signal. Free, updated every 6 hours.
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