Why Technicals?

It depends on the market you're playing. The US stock market is dominated by traders, not investors. Even a trader is an investor. That explains that a good company will be sold by those traders that have a profit. That will send the stock down. Also, if too many investors get onto a good company, there are no investors left who want to buy and the price has to be lowered to entice buyers - also leads to a pullback. So, you better have your basics right.