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RE: Warning about accuracy of Array functions inTS2000i-CPU/memory hits



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At 12:00 PM -0500 3/20/00, M. Simms wrote:

>Totally agree that computers should be infallible and software should
>be "perfect".... but when huge performance trade-offs exist as would
>be the case of double floating point, I'd rather be fast rather than
>"perfect".

I am glad you are not managing my money...

>You wouldn't want to experience the combination of BOTH a CPU "hit"
>and a "memory" hit if Omega goes immediately to doubles......everyone
>would need 512k RAM and the new gigahertz CPUs.

And they could pay for it with what they would lose in a few minutes on inaccurate calculations..

>Also, I can't understand why everyone is trading today based on data
>20,000 bars ago anyway ? Wow - isn't that stuff ancient history ?

The TradeStation function is coded to calculate the accurate value on the first bar and just adds and subtracts changes since then. The value 20,000 bars ago was correct. But along the way, the errors accumulate.

Bob Fulks