Datasets to power the Market Depth chart.
Both bids and asks are lists of 2-item tuples: [price, volume]

Additionally there are aggregate values provided for both sides of the book
and both quote and base currencies (in that order) under the totals key:

totals = [
[amount of quote currency in bids, amount of base currency in bids],
[amount of quote currency in asks, amount of base currency in asks],
]

A nice article explaining how the Depth Chart works:
https://hackernoon.com/depth-chart-and-its-significance-in-trading-bdbfbbd23d33

GET /api/public/market/ogc-btc/depth/
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Cache-Control: public, s-maxage=1
Content-Type: application/json
Vary: Accept

{
    "bids": [],
    "asks": [
        [
            "0.00471295",
            "4.243627"
        ],
        [
            "0.004713",
            "5.243627"
        ],
        [
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            "6.243627"
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            "9.723627"
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            "0.004913",
            "11.723627"
        ],
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            "13.453627"
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            "0.00648045",
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        ],
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            "0.007",
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        ],
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            "0.0075",
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        ],
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            "0.007756",
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        ],
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            "0.0099",
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        ],
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    "totals": [
        [
            0,
            0
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        [
            "27.5713283",
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    ]
}