An uptrend could go sideways for 20 years or more!
The trader should trade what is happening here and now, up or down, no matter what the "real" trend is.
Like a true Ninja, one moment I am buying, and the next I am shorting relentlessly.
In and out, that the secret...
You sound more like a short term trader. What time frame do you trade? For me I don't ever short the market unless it's due for a reversal on the bigger charts, like the weekly. When you try to short these little 5 minute dips, you eventually get burned. Although I will admit it can be fast and adventurous to trade the 1 minute charts if you're quick.