How does Liquidate() Behave?

Hi Michael,

Sort of reviving an old thread, but I wanted to ask if the liquidate() function also closes positions that are not native to QC. For example, suppose my QC algorithm was strictly trading SPY (e.g., self.AddEquity("SPY")), but I also manually have short SPX puts in my account. Would the liquidate function also open market orders for my SPX puts as well?

Thanks!
Fang

Correct; further if you place any trades outside of QC it will terminate the algorithm

Great! Thank you!

Just a quick follow up.  Am I correct, that upon liquidate, in this case, given that resolution is set to daily, the market order will be executed upon open on the following day?  Just wasn't clear when exactly such market order are executed. For example, if it was minute resolution.

class LiquidUniverseSelection(QCAlgorithm):
   
   filteredByPrice = None
   
   def Initialize(self):
       self.SetStartDate(2019, 1, 11)  
       self.SetEndDate(2019, 7, 1) 
       self.SetCash(100000)  
       self.AddUniverse(self.CoarseSelectionFilter)
       # Ignore this for now, we'll cover it in the next task.
       self.UniverseSettings.Resolution = Resolution.Daily

   def CoarseSelectionFilter(self, coarse):
       sortedByDollarVolume = sorted(coarse, key=lambda x: x.DollarVolume, reverse=True) 
       filteredByPrice = [x.Symbol for x in sortedByDollarVolume if x.Price > 10]
       return filteredByPrice[:8]
  
   def OnSecuritiesChanged(self, changes):
       self.changes = changes
       self.Log(f"OnSecuritiesChanged({self.UtcTime}):: {changes}")
       
       #1. Liquidate removed securities
       for security in changes.RemovedSecurities:
           if security.Invested:
               self.Liquidate(security.Symbol)
       
       #2. We want 10% allocation in each security in our universe
       for security in changes.AddedSecurities:
           self.SetHoldings(security.Symbol, 0.1)
       
 

Dear C C

Sorry for the delay. Yes, you're correct! It will elicit market orders to liquidate and filled upon the next bar's opening.

Best
Louis

The docs say that if you liquidate when the market closes it converts to an on-open order. In paper trading, this does appear to be the case. When liquidating on 11 / 25 / 2021, the position is never liquidated.

The docs say that if you liquidate when the market closes it converts to an on-open order. In paper trading, this does appear to be the case. When liquidating on 11 / 25, the position is never liquidated.