Order fill process

1. Orders definitely can get partially filled in Lean's order submissions to IB. All of none would be a useful option, I admit, if nothing else but to simplify logic in certain cases.

2. Order remains, only different is some shares have been filled of the total. To "void" them I understand you would have to use the Cancel method, until the confirmation of which you might get additional fills up to the order total.

3. From I remember from your last thread and from my own experience, Lean's mode is GTC.

Thanks again Petter. As usual your answers are very helpful.

Jared Broad or Alex, based on Petter's answers, more questions for you:

a. is there any way to make the order all or none?

b. if parial fill happens and the remaining of the order is still active, how do you cancel the remaining portion? by canceling the original order? in that case, will it not be confusing to LEAN that how many shares should be charges for, etc.?

We don't support All or None yet -- But I've made an issue for you here; and we'll start adding more order types ASAP. Its currently impossible to cancel an order which is partially filled. LEAN uses is GTC durations.

Great. Thanks!

For now I'm handling it through breaking the order into smaller blocks to reduce number of partial fills. Hopefully I get no (or very few) cases of partial fills.

I also added Immediate or Cancel to the issue. That would be even nicer than FOK.

I though to update this thread for whoever might need this info later. I called IB today and asked about how IOC works. He said this type of order is not time based. The way that it works is that when the order arrives to the exchange, they look for a match - if they don't find any, they reject it. Finally IB will cancel the order if there are no exchanges that can fill the order.

Now this method does not seem to be what I'm looking for. Instead I would like to set a timeout for my orders. So the IB person gave me a better option. If we set the time-in-force attribute of the order to GTC (Good Till Canceled), the API allows you to pass two dates: goodAfterTime and goodTillDate. Basically these are start and end times and the format of the string is: FORMAT: 20060505 08:00:00 EST

Whi means it takes a time up to seconds. This is perfer for me because I can now open an order that should be filled withing n seconds.

Jared Broad  , Alexandre Catarino - looking at the LEAN code, I found that there is a Duration attribute and it takes Custom as an option. But couldn't find how to pass the custom details.

Also I found some references in the (Onada) Rest API that takes gtdTime. Now my question is, is there any way to place an IB Order through the API? or somehow pass this gtdTime parameter when submitting an Order?

Thanks a lot!

My issue is I buy $995 of ETH on Bitfinex and it leaves a $5 order which is fine until I move the price and then LEAN says it's invalid becuase it's less than $10. What do I need in my code to cancel any orders less than $10?

Hi Patrick

You may refer to TimeInForce order property for a good till time order.

To cancel the remaining order, you may do:

self.ticket = self.MarketOrder(...)  # save the order instance

# Later at any instance you need, e.g. when the order is partially filled:
def OnOrderEvent(self, orderEvent):
    if orderEvent.OrderId == self.ticket.OrderId \
    and orderEvent.Status == OrderStatus.PartiallyFilled \
    and (self.ticket.Quantity - self.ticket.QuantityFilled) * self.Securities[symbol].Price < 10:
        self.ticket.Cancel()

Best
Louis