Portfolio123 - View Thread - out of sample data

Home Ready-2-Go Portfolio Ranking Screener Stock ETF Tools Community Help

Forums Email User Polls Feature Requests Groups

Index | Recent Threads | Who's Online | User List | Search

Portfolio123 » List all forums » Forum: Screener » Thread: out of sample data

Thread Status: Normal
Total posts in this thread: 2

[Request a Feature] [Post new Thread]
[Add To My Favorites] [Watch this Thread]

Author

This topic has been viewed 1084 times and has 1 reply

tarabia1
Advanced Member

UNITED STATES
Joined: Dec 7, 2004
Posts: 37
Status: Offline

out of sample data

Reply to this Post
Reply with Quote

What is out of sample data and when or why would it be used?

Thanks in advance

[Aug 5, 2008 2:00:33 PM]

[Link]

olikea
Advanced Member

UNITED KINGDOM
Joined: May 6, 2006
Posts: 693
Status: Offline

Re: out of sample data

Reply to this Post
Reply with Quote

"Out of sample" data is price and fundamental information not used in the creation of a trading strategy. Inherently, all real money trading is "out of sample". As a result, you may choose to select a time period to develop and optimise your system, but not use all the data available, so that you have a period against which you can test it on hitherto "unseen" data, just like you would in real life. If it fails miserably, then you know your process is flawed, usually caused by curve fitting.

[Aug 5, 2008 2:06:17 PM]

[Link]

[Show Thread Printable Version] [Post new Thread]

Free Trial / Log In