You're absolutely right: The 0..100 range contradicts the website that says DX = (+DI - -DI)/(+DI + -DI). This would not generate a 0..100 range, but a -1..+1 range. So one of them is obviously wrong.

Although I don't think that DX, +DI, or -DI can generate very useful trade signals, that issue has to be solved. I'll check the source and will find out which algorithm is really used.

Ok, TA-Lib indeed uses a different formula:

DX = 100*abs(+DI - -DI)/(+DI + -DI)

With this formula it's not possible to determine which crosses which. You're encouraged to write your own version of the +DI and -DI indicators if you need them. If you encounter any problems, post in the script forum and I'll help.

Hmmm okies I see, by the way I did notice these other indicators just now maybe they can be used?



There is no real description on what they return or do though but looking at the TALib for these indicators it seems maybe these are to be used instead?

Yes, that's it. The TA-Lib calculates them as separate indicators.

I've used NumOpenLong but I got the following message:

'NumOpenLong' undeclared identifier.

I need to include some specific line at start?

Thanks.

I tested that script below URL with another parameter and It said this error.
http://www.opserver.de/ubb7/ubbthreads.php?ubb=showflat&Number=410020#Post410020

BADFREE2: SYS

What is this?

That script had wrong variable names. It's "NumOpenLong" and "NumOpenShort", not "numShort".