Mark price

request

format: mark_price@{symbol}

eg: mark_price@btc_usdt

rate: 1000ms

Response

{
  "topic": "mark_price", 
  "event": "mark_price@btc_usdt", 
  "data": {
    "s":"btc_usdt", //trading pair
    "p":"50000",    //price
    "t":123124124   //timestamp
  }
}