You can play with moving average crossovers as long as you want.....something will always fit....
Lots of different moving average cross over techniques....I really think the "golden cross" is a toss!! haha.....depends on what style trading you doing or what stock....
For me in a general STT I use the 10/30 ema cross for my scans.....
Side note - Will still always check Daryl Guppys Multiple Moving Averages