I was wondering if there is a way to scan for flag patterns in version 12.  I found an old thread but it talked about using linear regresion lines and doing a sort on visual slope.  That is not in version 12.  I appreciate your help.

I'm guessing you are talking about the Finding Continuation Triangles And Wedges With Telechart topic. If so, page 5 of the topic talks about replacing the linear regression sorts used in TC2000 version 7 with boolean linear regression slope formulas in TC2000 version 12.2 (although they were actually talking about the the TC2000 version 11 beta at the time).

You may wish to review the following for information on pattern recognition in TC2000 (the Webinar at the end of the list was done using TC2000 version 12.1):

Falling wedge
Cup with a handle formation
PCF for cup with a handle
Scanning for Chart Patterns
Scanning for Stocks Printing a Double or Triple Bottom
PCFs for pennants and flags
PCF's for Triangles
Does TeleChart support Elliott Wave indicators?
Double top/bottom trend
Finding Double Tops and Double Bottoms
CUP AND HANDLE AGAIN
Finding Continuation Triangles And Wedges With Telechart
Cup & Handle PCF
Double tops and bottoms
Flag wedge and pennant pcf
05/01/2012 Webinar: Trading the Flag and Pennant Patterns

That said, I personally do not think complex pattern recognition is practical in TC2000 using formulas and Scans.

They are at the very least beyond my abilities to help you create without a specific unambiguous objective definition of what you are attempting to identify. It can't be an I know it when I see it type of definition or be based entirely on an image.

This is true of pattern recognition in general with the exception of fixed size candlestick patterns, which are fairly straightforward as long as the pattern is well defined:

Boolean PCFs for Candlestick Patterns