WebSocket 公共接口成交记录本页总览成交记录请求 格式: trade@{symbol} 示例: trade@btc_usdt 频率: 实时 响应示例 响应{ "topic": "trade", "event": "trade@btc_usdt", "data": { "s": "btc_usdt", "i": 6316559590087222000, "t": 1655992403617, "oi": 6616559590087222666, "p": "43000", "q": "0.21", "v": "9030", "b": true }}