"I have finally worked it out the only thing that really drives up or down the sp is a good or bad ann"
Tube, my friend. Is that backed up with research or do you just think it works like that?
Have a look at these dates for NWE. You don't have to be fixed either you can alter them slightly. It may surprise you.
22 March 1999.
18 June 2001.
29 July 2002.
6 Sep 2004.
28 Aug 2006
18 Feb 2008
14 Sep 2009.
8 Nov 2010.
30 Jan 2012.
16 July 2012.