pairs derived

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "asset_a": "BTC",
      "asset_b": "ETH",
      "asset_class": "crypto",
      "lookback_days": "30"
    }
  },
  "output": {
    "type": "json",
    "example": {
      "risks": [
        "Correlation can break permanently (e.g. ETH merge changed dynamics)",
        "Crypto market structure shifts make historical z-scores unreliable",
        "Both legs can move adversely in a flash crash"
      ],
      "asset_a": "BTC",
      "asset_b": "ETH",
      "scan_time": "2026-06-06T12:00:00Z",
      "asset_class": "crypto",
      "trade_signal": {
        "action": "long_a_short_b",
        "rationale": "ETH/BTC at 1.8 std devs above 30d mean. If historical correlation holds, ETH likely to underperform BTC short-term.",
        "exit_condition": "ETH/BTC ratio returns to 0.052 (30d mean)",
        "entry_condition": "ETH/BTC ratio above 0.054 (current: 0.056)",
        "stop_loss_condition": "ETH/BTC ratio exceeds 0.060 (3 std devs)",
        "estimated_profit_bps": 380,
        "typical_holding_period": "3-10 days"
      },
      "size_guidance": {
        "hedge_ratio": 1,
        "dollar_neutral": true,
        "recommended_notional_per_leg": "$5,000-$50,000",
        "max_position_size_pct_of_capital": 5
      },
      "current_signal": {
        "signal_strength": "moderate",
        "spread_direction": "asset_b_premium",
        "estimated_z_score": 1.8,
        "current_relationship": "ETH is trading at a premium to its historical BTC ratio. ETH/BTC ratio elevated vs 30-day average."
      },
      "pair_statistics": {
        "historical_context": "BTC/ETH is one of the most studied crypto pairs. The ETH/BTC ratio (currently 0.052) oscillates between 0.04 and 0.07 across cycles.",
        "mean_reversion_speed": "medium (1-7d)",
        "typical_spread_behavior": "ETH typically prices at 6-8% of BTC value. Deviations >2 standard deviations historically revert within 2-7 days.",
        "cointegration_assessment": "strong",
        "estimated_correlation_30d": 0.87
      },
      "pulse_suggestions": [],
      "related_pairs_to_watch": [
        "ETH/SOL",
        "BTC/SOL",
        "WBTC/WETH on-chain spread"
      ],
      "asset_class_specific_notes": "Crypto pairs are highly correlated in bull markets but diverge on asset-specific news (ETH upgrades, BTC halving). Trade through perpetual futures for easy short access."
    }
  }
}