Fair point - I'll rephrase: Forget fundamentals unless you thoroughly understand them.
I agree.
In my view, in many (certainly not all) situations fundamentals can be very helpful used in conjunction with technical factors to significantly improve the likelihood of a successful trade.
However, the only one I consider is the mood of the market. For a day trader, this is necessarily a shorter-term thing, although it might obviously agree with longer-term fundamentals.
Essentially, it goes back to the line of least resistance, but crucially one must be on one's toes and recognise that this can change rapidly. One must also recognise that one's time scale can have a dramatic effect on this.
As a very obvious example, the line of least resistance for index futures is clearly up. However, yesterday I took one of the easiest shorts I have ever experienced yesterday on YM. This is because the line of least resistance (on my time scale) is clearly down.
In this instance chart reading was merely a timing factor, that is it told me when to start trading, and not in which direction to trade.
Other times I ignore fundamentals entirely and trade based solely on the chart . However, it is generally far easier when I have fundamental factors in support.