public Task <string> ReqHistoryTickDatapointsAsync(string symbol, int maxDatapoints, int?dataDirection = null, string requestId = null,
int?datapointsPerSend = null)
{
var request = _historicalRequestFormatter.ReqHistoryTickDatapoints(symbol, maxDatapoints, dataDirection, requestId, datapointsPerSend);
return(_rawMessageHandler.GetFilenameAsync(request));
}