Home / API Reference / StockSharp.Twime.Dialects.Asts OrderMassCancelRequest StockSharp.Twime.Dialects.Asts Fields Board public Utf8String4 Board value = orderMassCancelRequest.Board Board ID SECBOARD(4) Symbol public Utf8String12 Symbol value = orderMassCancelRequest.Symbol Instrument ID SECODE(12)