How do I close a particular position?

I have code that loops over open tickets, and I want to close a particular position. All the examples I found show the use of setHoldings. How do I close a particular position?


// All filled orders

var tickets = Transactions

     .GetOrderTickets(x => x.Status == OrderStatus.Filled);

//loop over order tickets

     foreach (OrderTicket ticket in tickets) {

                      //what is the code to flatten the order here?


Update Backtest

While OrderTickets can be looped over, specific positions cannot actually be changed via the method suggested above. Order tickers are meant to update, cancel or check the status of your specific order but once an order is placed they can't be used to close a position. QuantConnect aggregates the whole portfolio together so its an average of your past trades. I understand that in FX brokerages one can close specific matching orders. In order to flatten a position, Liquidate(Symbol) is a useful method. In this case, it might be worth maintaining a list of symbols for specific positions. Another useful method is self.Portfolio[Symbol].Quantity, which will return the current quantity held of the security. So instead of Liquidate(), orders can be made using this value.


Give Thanks. 

So, for example, if the position is Long 200 IBM,  and wish to rebalance to 100 IBM, do I use: 

newTicket = MarketOrder("IBM", -100, asynchronous: true);



Update Backtest


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