Posted: Mar 12, 2012 @ 03:55 PM             Msg. 1 of 2

Can you confirm that we are understanding OEC's trailing stop behavior correctly?

In a Trailing Stop, the following fields are the price-related fields that affect its behavior:

• OrderDraft.Price
  
• Reference (via OrderDraft.SetTSData)
  
• Delta (via OrderDraft.SetTSData)

The behavior of such values is as follows:

• OrderDraft.Price = price-level where the trailing behavior begins
  
• Reference = trigger price to start trailing logic
  
• Delta = Modifier that affects both OD.Price and Reference

Did I get all this right?

We see one problem:
In the docs, it says "Usually reference price is the last trade price, and delta is 0."

Doesn't that potentially create a race condition? What if the last trade price changes in between user-action and OEC-reception?

Posted: Mar 15, 2012 @ 11:23 AM             Msg. 2 of 2

Probably, you understand it slightly incorrectly: Reference and Price are modified when current market price is better than Reference price and difference is greater than Delta. So, the docs describes a situation when you need to start trailing logic immediately.

Modify request is an atomic transaction: it will replace all three fields at once.

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Victor Vins
Lead Software Developer