I developed the 100 MA rules because in my early days of trading the dow, I managed to get severley whipsawed on numerous occaisions, losing 10's of points at a time, when over a period of hours, the price went nowhere. As for going long.... I have a preference for going long, and a mental block( that I still struggle with) in going short. So, unless the short is clear cut, I don't do it, preferring to wait it out and find a bottom reversal. No doubt one day I'll get the hang of it !. Also, not being a "full time" trader, I often get into a position and miss a good exit. In the past, I used to panic. Now I sit it out and bide my time. I does mean I miss quite a few 40 point moves, but then I don't rely on trading for a living, so I can afford that luxury.