One way to unlearn this problematic bias is to take dynamic charts of some stock, (like rimm for example), and scroll backwards in time. You'll see that those sky high prices which looked ripe for a fall, look like bargains in hindsight. If you look at enough of these, it tends to help un-glue your mind from that bias (and gasp, TA bias in general), IMO. real life ex: Hey it's a way overbought wave 3 pullback setup! So you short away with your lifetime savings and .... You promptly have your head served to you on a rusty platter. At which point your guru tells you, oh, er... that was a nested fractal in a bigger wave context. This might be a good picture to refer to as I'm sure many are preparing for the short of the lifetime on major indices.