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SteveL

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Joined: 8/19/2005
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Subject : RE: "Use DSS Results" has no effect in PortSim
Posted : 2/6/2013 3:41 PM
Post #27867 - In reply to #27851

Hi Barry,
I just watched Jeff Drake's webinar (thanks for that link) showing how Swing-13 works with DSS. That webinar clarified for me how DSS interacts with PortSim. I had made an incorrect assumption. I assumed the DSS sort ordering was used in PortSim. But obviously that is incorrect.

From my viewpoint, DSS incorporates two ideas. The first is a sorting of the signals by some criteria, e.g. relative strength. The second is a filter which only permits certain number of long and short signals through, based on some criteria (possibly/probably different than the sort criteria).

This set of filtered signals, is then passed on to PortSim, where the PortSim selection criteria are applied. My mistake was assuming that the "sort order" done by DSS part 1 (e.g. relative strength) would control the order in which trades were selected in PortSim. I assumed selecting "Use DSS results" overrode the PortSim trade selection criteria. But really, what it does is apply the 2nd DSS concept, which is to only permit a predetermined number of long and short signals based on some criteria. And then that filtered list is processed by PortSim's selection criteria, with no consideration given to the DSS sort order.

(Edit)
NOTE: Of course the PortSim "trade selection criteria" only matter when the number of trades passing the DSS filter are sufficient to exceed the available buying power.
(end edit)

So, you can consider this thread closed.

Thanks,
Steve

[Edited by SteveL on 2/6/2013 3:45 PM]

Deleting message 27867 : RE: "Use DSS Results" has no effect in PortSim


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