mtapi/MtApi/TradeOperation.cs

namespace MtApi
{
    public enum TradeOperation
    {
        OP_BUY          = 0,
        OP_SELL         = 1,
        OP_BUYLIMIT     = 2,
        OP_SELLLIMIT    = 3,
        OP_BUYSTOP      = 4,
        OP_SELLSTOP     = 5
    }
}