hscott
34 posts
msg #52508
- Ignore hscott |
6/25/2007 9:26:05 PM
Possibly a dumb idea but here goes. Suppose I have a filter F. I want a filter F1 which is F plus a measure of results of F x days ago. In other words, F1 returns results of F only if the performance results of F x days ago was above 0 (or above a certain limit). Of course I could do this manually but that is more cumbersome.
So the question is - how do I write F1 given that I know F?
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nikoschopen
2,824 posts
msg #52516
- Ignore nikoschopen |
6/25/2007 10:50:37 PM
You need to be more specific in ure request. Just what constitutes "F" and what additional criteria are you looking to add for "F1"?
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hscott
34 posts
msg #52518
- Ignore hscott |
6/25/2007 10:58:32 PM
OK "F" just stands for any filter you choose. I only want results from F1 if, as of today, the results from the stocks returned by F 5 days ago are positive. (Or x days ago or above 1% or...). In other word if the 5 day performance of F is negative, then F1 gives a null result.
Hope that makes it cleare - don't know how better to say it.
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corsino
259 posts
msg #52522
- Ignore corsino |
6/26/2007 12:24:01 AM
Accurately predicting filter performance based on past performance may be harder than predicting future performance of a single stock.
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nikoschopen
2,824 posts
msg #52524
- Ignore nikoschopen |
6/26/2007 12:43:29 AM
Believe it or not, another user asked the same question. Take a look here. I believe the either the "count()" or "day()" function will solve ure problem as well.
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hscott
34 posts
msg #52537
- Ignore hscott |
6/26/2007 8:30:02 AM
Yes I saw that thread and realized the similiarity. I would like to use days or count but as far as I know there is no way to use anything about the results of a filter IN a filter. I hope I am wrong about this but I don't know how to do it.
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