daytrade diaries... july 6 part 2, page-51

I know this is break time for DTers, so this is a question for the late-nighters later:

I was reading an article that suggested that watching moving averages for a bullish short-term signal (eg: 5-day MA crossing above 20-day MA) is actually counterproductive. This is because it's such a commonly identified day-trading trigger, it becomes overused and no longer reflects the true technicals of the share price and volume.

Does anyone have any opinions on this? Can crossovers be used reliably these days with so much software scanning available?