Hello Is it possible to do this sort of loop, example taken from Hull's Tradestation code for Range Indicator - Central Cord, using a dll ? Source:Alan Hull - book - Active Investing Variable:Cord(0),Period(52),Counter(52); For counter = 52 downto 13 begin if linearRegValue(close,counter,0) > linearregvalue(close,period,0) then period = counter; end; Cord = linearregvalue(close,period,0); Many thanks Regards Dave

I would be interested in such an external function. Not sure if it is possible to make generic or if only specific to the code listed. If someone is able to produce something for free use to the community that would be great ;) or otherwise they can contact me directly ? Not sure if I am breaking forum etiquette by making such a request. Please correct me for the future if I am. Many thanks Dave

Anyone had a chance to work on the following code ? Variable:Cord(0),Period(52),Counter(52); For counter = 52 downto 13 begin if linearRegValue(close,counter,0) > linearregvalue(close,period,0) then period = counter; end; Cord = linearregvalue(close,period,0); The same code is also used in the ROR indicator which is used to determine trend strength. Any help appreciated.

Hi Dave I think this can be done with PREV based MFL code. I also think it can be done with MFL code without using PREV. With almost 40 loops it might tax the 2499 character limitation of an MS indicator as well as the 40-constant restriction. However, those restrictions can be overcome easily enough. The Ehler's Distant Coefficient Filter in the September 2004 issue of MSTT is an example of the PREV-based construction that I think could work. If that can be accomplished then a non-PREV version is just around the corner. Roy MetaStock Tips & Tools

Wow, I did not know what was involved in using the MDK. Crikey.

can you post Roy's solution? wabbit :D

Hi Wabbit I attempted to post my solution earlier, and the result was a series of smiley faces down the page. I've inserted a space in the places necessary to overcome this glitch (the only way I know), and the formula should show up OK. This plots the highest linear regression value for the periods range of 13 to 52. Roy MetaStock Tips & Tools [code:1:b06392d75a]{Hull - Central Cord} x:=LinearReg(C,13);x1:=LinearReg(C,14); x2:=LinearReg(C,15);x3:=LinearReg(C,16); x4:=LinearReg(C,17);x5:=LinearReg(C,18 ); x6:=LinearReg(C,19);x7:=LinearReg(C,20); x8:=LinearReg(C,21);x9:=LinearReg(C,22); y:=Max(Max(Max(Max(x,x1),x2),x3),x4); y:=Max(Max(Max(Max(Max(y,x5),x6),x7),x8 ),x9); x:=LinearReg(C,23);x1:=LinearReg(C,24); x2:=LinearReg(C,25);x3:=LinearReg(C,26); x4:=LinearReg(C,27);x5:=LinearReg(C,28 ); x6:=LinearReg(C,29);x7:=LinearReg(C,30); x8:=LinearReg(C,31);x9:=LinearReg(C,32); y:=Max(Max(Max(Max(Max(y,x),x1),x2),x3),x4); y:=Max(Max(Max(Max(Max(y,x5),x6),x7),x8 ),x9); x:=LinearReg(C,33);x1:=LinearReg(C,34); x2:=LinearReg(C,35);x3:=LinearReg(C,36); x4:=LinearReg(C,37);x5:=LinearReg(C,38 ); x6:=LinearReg(C,39);x7:=LinearReg(C,40); x8:=LinearReg(C,41);x9:=LinearReg(C,42); y:=Max(Max(Max(Max(Max(y,x),x1),x2),x3),x4); y:=Max(Max(Max(Max(Max(y,x5),x6),x7),x8 ),x9); x:=LinearReg(C,43);x1:=LinearReg(C,44); x2:=LinearReg(C,45);x3:=LinearReg(C,46); x4:=LinearReg(C,47);x5:=LinearReg(C,48 ); x6:=LinearReg(C,49);x7:=LinearReg(C,50); x8:=LinearReg(C,51);x9:=LinearReg(C,52); y:=Max(Max(Max(Max(Max(y,x),x1),x2),x3),x4); Max(Max(Max(Max(Max(y,x5),x6),x7),x8 ),x9);[/code:1:b06392d75a]

Thanks Roy, I was sort of hoping you had done it the long-way around! I was playing with PREVs to see if I could figure a solution. It hasn't worked so far, but that might be because I jumped straight into the code instead of thinking about it logically for a while. I think there is a better way, the trick now is to do it! wabbit :D

.... as I said Roy, this puzzle is going to involve some thinking time. :lol: wabbit :D 59 days to go...

... and then a slight variation on the code above to extend the flexibility. You lose some of the counts, but its an acceptable loss (IMHO). [code:1:ff19d9280f]x:=Input("Period Starting Value",1,100,13); spc:=Input("Spacing",1,10,1); x1:= Max(LinearReg(C,x+spc*00), Max(LinearReg(C,x+spc*01), Max(LinearReg(C,x+spc*02), Max(LinearReg(C,x+spc*03), Max(LinearReg(C,x+spc*04), Max(LinearReg(C,x+spc*05), Max(LinearReg(C,x+spc*06), Max(LinearReg(C,x+spc*07), Max(LinearReg(C,x+spc*08), Max(LinearReg(C,x+spc*09), Max(LinearReg(C,x+spc*10), Max(LinearReg(C,x+spc*11), Max(LinearReg(C,x+spc*12), Max(LinearReg(C,x+spc*13), Max(LinearReg(C,x+spc*14), Max(LinearReg(C,x+spc*15), Max(LinearReg(C,x+spc*16), Max(LinearReg(C,x+spc*17), Max(LinearReg(C,x+spc*18),LinearReg(C,x+spc*19)))))))))))))))))))); x2:= Max(LinearReg(C,x+spc*20), Max(LinearReg(C,x+spc*21), Max(LinearReg(C,x+spc*22), Max(LinearReg(C,x+spc*23), Max(LinearReg(C,x+spc*24), Max(LinearReg(C,x+spc*25), Max(LinearReg(C,x+spc*26), Max(LinearReg(C,x+spc*27), Max(LinearReg(C,x+spc*28), Max(LinearReg(C,x+spc*29), Max(LinearReg(C,x+spc*30), Max(LinearReg(C,x+spc*31), Max(LinearReg(C,x+spc*32), Max(LinearReg(C,x+spc*33), Max(LinearReg(C,x+spc*34), Max(LinearReg(C,x+spc*35), Max(LinearReg(C,x+spc*36), Max(LinearReg(C,x+spc*37),LinearReg(C,x+spc*38))))))))))))))))))); Max(x1,x2);[/code:1:ff19d9280f] wabbit :D