{
"channel": "l4Book",
"data": {
"updates": [
{
"coin": "BTC",
"side": "A",
"px": "65001.0",
"sz": "0.5"
},
{
"coin": "BTC",
"side": "B",
"px": "64999.0",
"sz": "0.3"
}
]
}
}Live Data WebSocket API
l4BookUpdates
L4 book update events only (no full snapshot on this channel)
Subscribe with
{"method":"subscribe","subscription":{"type":"l4BookUpdates"}}. Frames follow L4BookUpdate (same shape as incremental updates for l4Book).