Brooke, I am trying to incorporate Bob Jagow's slope formula into a scan I'm doing and need some of your expert help. If I want to identify stocks whose 21-day linregslope is greater than the prior day, and I want to run the scan for, say, the last 10 trading days, how do I modify Bob's scan (which I've already adjusted to 21 days from 14):
issuetype common;
Daystoload=50; //needed for R2 bug!!!
integer i, S, Sx, Sxx;
float b, Sxy, Sy;
S := 21;
Sx := 0;
Sxx := 0;
Sxy := 0;
Sy := 0;
for i = 1 - S to 0 do
Sx := Sx + i;
Sy := Sy + close(i); //kills println wo d2ld
Sxx := Sxx + i*i;
Sxy := Sxy + i*close(i); //kills println wo d2ld
//Sxy := Sxy + i*close(0);
next i;
b := (S*Sxy - Sx*Sy)/(S*Sxx - Sx*Sx);
Thanks in advance, Jan |
