async unsubscribeCandles (symbol, frame) {
    return this.managedUnsubscribe('candles', `trade:${frame}:${symbol}`)
  }
@param {string} symbol - symbol of candles
@param {string} frame - time frame
@returns {boolean} unsubscribed
@see WSv2#subscribeCandles
@example
  await ws.unsubscribeCandles('tBTCUSD', '1m')