What you're saying here is not 'conventional wisdom.' Conventional wisdom (at least, fundamental analysis) is that the price on the market incorporates all information and that the market is by and large full of rational actors. So, timing the market is a fool's errand, since you can't get ahead of the present.

I'm not saying I agree with this, I'm just saying that that's what you're taught in school. If there were a way to prove this indisputably incorrect then it would probably be an interesting result.