{
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  "id": 12542,
  "slug": "12542",
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  "description": "APEX Runner: Arb Spread Signal",
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      "description": "Cross-exchange arbitrage spread between Kraken and Hyperliquid for BTC and ETH. Returns live price spread %, net spread after fees, and arb viability flag for cross-exchange arbitrage execution.",
      "example": {
        "hl_price": 62380,
        "kraken_price": 62450,
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        "spread_pct": 0.11,
        "viable": false
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          "kraken_price": "float — mid-price on Kraken at time of snapshot",
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          "spread_pct": "float — gross spread as a percentage of price",
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          "viable": "boolean — true when net spread exceeds estimated round-trip fees"
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                      "source": {
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                      "trades_backing_signal": {
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                          "type": "integer"
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                        "direction": {
                          "type": "string"
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                        "gross_spread_pct": {
                          "type": "number"
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                        "hl_price": {
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                          "type": "number"
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    "submitted_at": "2026-09-18T22:00:31.484Z"
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}