Man,
I wasn't trying to be aggressive, only humorous.
But....
You seem to be saying, "I'm going to start doing this tomorrow
anyway, so please don't bum me out ."
Well, sorry, but here are the facts:
I know quite a few people who make a living at pair (or pairs)
trading. It must work to some degree, and I use it around the opening, or at the opening, particularly when there are upgrades/downgrades/news.
When I say, "a living", I mean a very good living --low to mid six figures. One guy uses it on bond futures and is up $1.5-$2 million this year between bonds and stocks. Of course, the position sizes necessary to generate these profits are such that great damage can be done to your net worth......just as with any arb strategy.
For example, the guy who is up $1.5-$2 mill, had, at one point, $1.2 BILLION in long/ short bond futures positions. Yes, that's a "B", not an "M." I'm not sure what the haircut is on that position, but his firm was obviously at risk--not just him.
To a man, these pair traders do NO fundamental analysis, and almost no technical analysis. Their selections are based almost entirely on past price relationships.
Now, having encouraged you with the above, I know of many,many more ex-traders who lost all of their capital with this strategy. I say I know "of" them, because they remind me of the poorly-trained new recruits sent to the front during WWII, never to be seen again. The experienced soldiers didn't want to know their names. Unfortunately, some of the new recruits were friends of mine.
Here's an example of the risk of any arb strategy gone awry. In August, I lost $10,000 in an arb involving 2,000 shares of a $2 stock. The short side rallied and the long side dropped 80%. So, the point is that all arb strategies are risky. Usually, a great deal more risky than you first assumed.
I do pair trade, primarily with low volatility stocks like REIT's.
I do some fundamental research, but not much. But even pairs of VERY similar stocks like FNM/FRE have blown out many a trader.
Man, I don't pretend to have some of the answers, just all of them!
(My private pair(s) trading course is available for the small fee of $100,000)