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Algorithmic Trading
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Re: Helper controls and order amendments
Cathy Mildenberger / Neovest, Inc.
19 Jan 2012 11:06AM ET Yes - this was a problem for us. What we ended up doing was determining which components controlled the state of other components and recorded (and cached) their values along with the order. Then on a change order we first load the values of these state contolling components (hoping this is enough to get the ui in the right state) then loading the other real values.
> A question mainly for people who've built FIXatdl implementations, but very happy to receive any useful insights.
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> It's quite common to have a helper control that alters the state of another control, but for the helper control not to have its own parameter. The canonical example is Start and End Times, where a CheckBox or pair of RadioButtons is used to enable/disable a Clock control.
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> This is fine for order creation, but introduces some challenges when doing order amends, as there is no obvious way to determine the state the helper control should be initialized in. I have seen vendors introduce pseudo parameters that don't have a fixTag, but that requires that the system cache this information in addition to the output FIX message from the order creation - not ideal.
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> Grateful for any insights on this one.
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Re: Helper controls and order amendments
Cathy Mildenberger / Neovest, Inc. 19 Jan 2012 11:06AM ET
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