Ok here is my dumb question for the week, lol. I'm just doing my own research into things at the moment.

Is it a co-incidence that the all ords(xao) and FTSE 100 basically look identical in chart format? That is, the same basic curves up and down on both graphs look essentially the same over the period Dec 2007-May 2008??

I suppose the companies that make up the index for the FTSE100 are mostly present in the all ords as well, but I'm still surprised that the graphs look basically identical.

Anyway I'm looking for some basic patterns at the moment. I'm trying to see if there is correlation between charts. e.g. Like if oil goes up, which other charts/sectors go down as a result. (for shorting opportunities etc possibly).