How do you capture the open price accurately?

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Old Feb 17, 2011, 5:39am   #1
 
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How do you capture the open price accurately?

Hello all! This is my first post, and I know of T2W's vast knowledge base of the users. Thanks in advance. On to the question:

I developed a trading system that requires entering trades at the open of the trading day. I've implemented the system with an API through Trader Workstation with Interactive Brokers, and I need to know what the best method for capturing open prices is. My current method for entering a trade at the open is as follows:

1. Before the market opens, transmit a market buy order (for example) for 100 MSFT at 8:42AM Eastern Time.
2. The system tells me that my order will be held until the market opens at 9:30AM. No problem, this is what I want.
3. The market opens, but my order fills a minute or so later (trade fills at 9:31:08AM for example). The fill price is worse than the open price (typically).

I understand that market orders are filled on a first-come first-serve basis with most exchanges (I specify these orders to be SMART routed), so I'm not surprised by the lag in time. However, the execution price is usually worse than the opening price of the day. (for example MSFT opens at 27.25, but I end up getting filled at 27.34 on a long trade)

I've heard of the arrival price algo that IB has, but there are so many order types to choose from. I'm not sure what is best. It would be fantastic if I can pick my stocks before the market opens, and guarantee that my trade entries will fill at the open price for the day. Does anyone know how best to do this?
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Old Feb 17, 2011, 7:47am   #2
Joined Sep 2010
Re: How do you capture the open price accurately?

You have asked your broker to execute your Market Order at the most volatile time of the day at 9.30am.
You have basically given them the right to tell you that they filled your order at any price they like within that minute. Expect to get screwed over. Because they can screw you with that type of Order.

Alternatively, if you still want to be executed at the Open of trade, then accept that you will invariably get filled at the worst price within that first minute. You are a gift of around 10-20 points per trade to the broker every day you trade.
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Old Feb 17, 2011, 9:21am   #3
 
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Re: How do you capture the open price accurately?

It shouldnt take that long to fill.

If you were to place a manual market at 9:30 does it take over 1 minute to fill?
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Old Feb 17, 2011, 3:57pm   #4
 
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Smile Re: How do you capture the open price accurately?

wheresthejelly started this thread
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Originally Posted by donaldduke View Post
It shouldnt take that long to fill.

If you were to place a manual market at 9:30 does it take over 1 minute to fill?
I tried placing a market order for 50 MSFT at exactly 9:30AM. I basically hit the transmit button right when my atomic clock struck 9:30AM. The order filled at exactly 9:30:10AM at 26.96. The reported open price for today is 26.96, so that seemed to work.

However, I want to have Trader Workstation do this for me without needing my presence. I tried the "Arrival Price" algo on 3 different stocks and got mixed results. One filled at a better price than the open, but two filled at worse prices than their respective opens.
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Old Feb 18, 2011, 10:53pm   #5
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Re: How do you capture the open price accurately?

Quote:
Originally Posted by wheresthejelly View Post

However, I want to have Trader Workstation do this for me without needing my presence. I tried the "Arrival Price" algo on 3 different stocks and got mixed results. One filled at a better price than the open, but two filled at worse prices than their respective opens.
That will work better. On average, the pluses and minuses will negate each other out over the bigger number of order fills.

If you are trying to get the exact Open price on every order, you are trying to be the FIRST order to be filled EVERY time. (It won't happen! Especially in the more liquid stocks)
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Old Feb 19, 2011, 4:54am   #6
 
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Re: How do you capture the open price accurately?

wheresthejelly started this thread
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Originally Posted by traderman1 View Post
If you are trying to get the exact Open price on every order, you are trying to be the FIRST order to be filled EVERY time. (It won't happen! Especially in the more liquid stocks)
I agree traderman1. I know I am small fry in the market, and there's no chance I will be the first trade of the day. However, is there some way to have Trader Workstation observe the opening price and then 0.002 seconds later, place a limit order for that exact price?

For example, the first trade at 9:30:00AM of the day for MSFT is recorded as 26.53. I could come in 1 minute later (because I'm slow like this) and manually set a limit order for 26.53, but I would love for TWS to do this automatically. Is this what the Arrival Price algo does? I set the "beginning time" criteria to 9:30:00AM for my tested trades, but I plan on trying 9:29:59AM as well to account for latency.
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Old Feb 19, 2011, 5:07am   #7
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Re: How do you capture the open price accurately?

Quote:
Originally Posted by wheresthejelly View Post
I agree traderman1. I know I am small fry in the market, and there's no chance I will be the first trade of the day. However, is there some way to have Trader Workstation observe the opening price and then 0.002 seconds later, place a limit order for that exact price?
.
Not that I know.

Quote:
Originally Posted by wheresthejelly View Post
For example, the first trade at 9:30:00AM of the day for MSFT is recorded as 26.53. I could come in 1 minute later (because I'm slow like this) and manually set a limit order for 26.53, but I would love for TWS to do this automatically. Is this what the Arrival Price algo does?
Why would you want to set it to the Opening Price AFTER the market has opened. Surely you would want to buy or sell at the NEW price IF it has moved in your favour.
If it has moved against you then you would not want the Open price

Quote:
Originally Posted by wheresthejelly View Post
I set the "beginning time" criteria to 9:30:00AM for my tested trades, but I plan on trying 9:29:59AM as well to account for latency.
Tell us how that works after you have tried it. I expect that it will simply be placed in the queue of orders at the Open and filled within the first minute.
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